Document And Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Feb. 29, 2012	Jun. 30, 2011
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Entity Registrant Name	RPX Corp
Entity Central Index Key	0001509432
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		50,044,818
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 339.4

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 106,749	$ 46,656
Short-term investments	126,976
Restricted cash	500	500
Accounts receivable	16,160	12,632
Prepaid expenses and other current assets	12,124	5,987
Deferred tax assets	5,192	2,567
Total current assets	267,701	68,342
Patent assets, net	163,352	126,508
Property and equipment, net	2,317	623
Goodwill and intangible assets, net	3,512	583
Restricted cash	147	220
Deferred tax assets, less current portion	300
Other assets	665	746
Total assets	437,994	197,022
Liabilities, redeemable convertible preferred stock and stockholders' equity
Accounts payable	821	634
Accrued liabilities	7,762	7,281
Deferred revenue, current	96,513	73,235
Notes payable and other obligations, current	5,056	18,527
Other current liabilities	2,182	3,314
Total current liabilities	112,334	102,991
Deferred revenue, less current portion	11,762	9,205
Deferred tax liabilities	14,695	6,146
Notes payable and other obligations, less current portion		5,056
Other liabilities	119	124
Total liabilities	138,910	123,522
Commitments and contingencies (Note 12)
Redeemable convertible preferred stock, $0.0001 par value - 10,000 and 26,230 shares authorized: 0 and 26,230 issued and outstanding as of December 31, 2011 and 2010, respectively; aggregate liquidation preference of $0 and $64,361 as of December 31, 2011 and 2010, respectively		62,793
Common stock, $0.0001 par value - 200,000 and 60,000 shares authorized: 49,145 and 11,432 issued and 49,145 and 10,944 outstanding as of December 31, 2011 and 2010, respectively	5	1
Additional paid-in capital	259,292	51
Retained earnings	39,787	10,655
Total stockholders' equity	299,084	10,707
Total liabilities, redeemable convertible preferred stock and stock holders' equity	$ 437,994	$ 197,022

Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Redeemable convertible preferred stock, par value	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized	10,000,000	26,230,000
Redeemable convertible preferred stock, shares issued	0	26,230,000
Redeemable convertible preferred stock, shares outstanding	0	26,230,000
Redeemable convertible preferred stock, liquidation preference	$ 0	$ 64,361
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	60,000,000
Common stock, shares issued	49,145,000	11,432,000
Common stock, shares outstanding	49,145,000	10,944,000

Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Operations [Abstract]
Revenue	$ 154,044	$ 94,874	$ 32,822
Cost of revenue	67,371	43,602	17,710
Selling, general and administrative expenses	40,593	23,917	10,250
Loss on sale of patent assets, net		536
Operating income	46,080	26,819	4,862
Interest income	197	275	15
Other income (expense), net	5	12	(72)
Interest expense	(925)	(3,051)	(4,384)
Income before provision for (benefit from) income taxes	45,357	24,055	421
Provision for (benefit from) income taxes	16,225	10,184	(1,513)
Net income	29,132	13,871	1,934
Less: allocation of net income to participating stockholders	9,435	12,479	1,934
Net income available to common stockholders - basic	19,697	1,392
Undistributed earnings re-allocated to common stockholders	613	279
Net income available to common stockholders - diluted	$ 20,310	$ 1,671
Net income per common share:
Basic	$ 0.61	$ 0.24
Diluted	$ 0.57	$ 0.23
Weighted-average shares used in per common share calculation:
Basic	32,032	5,747	2,148
Diluted	35,920	7,164	2,169

Consolidated Statements Of Redeemable Convertible Preferred Stock And Stockholders' Equity (Deficit) (USD $) In Thousands	Series B Redeemable Convertible Preferred Stock [Member] Redeemable Convertible Preferred Stock [Member]	Series C Redeemable Convertible Preferred Stock [Member] Redeemable Convertible Preferred Stock [Member]	Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Total
Balance at Dec. 31, 2008			$ 25,193	$ 1	$ 1,725	$ (5,150)	$ (3,424)
Balance, shares at Dec. 31, 2008			13,995	11,209
Issuance of redeemable convertible preferred stock	33,819
Issuance of redeemable convertible preferred stock, shares	11,746
Vesting of stock options early exercised					14		14
Stock-based compensation					227		227
Net income						1,934	1,934
Balance at Dec. 31, 2009			59,012	1	1,966	(3,216)	(1,249)
Balance, shares at Dec. 31, 2009			25,741	11,209
Issuance of redeemable convertible preferred stock		3,781
Issuance of redeemable convertible preferred stock, shares		489
Vesting of stock options early exercised					25		25
Stock-based compensation					1,246		1,246
Net income						13,871	13,871
Issuance of common stock in exchange for assets					52		52
Issuance of common stock in exchange for assets, shares				174
Issuance of restricted stock upon early exercise of options ,shares				50
Repurchase of common stock					(3,238)		(3,238)
Repurchase of common stock, shares				(489)
Balance at Dec. 31, 2010			62,793	1	51	10,655	10,707
Balance, shares at Dec. 31, 2010			26,230	10,944
Vesting of stock options early exercised					102		102
Stock-based compensation					7,106		7,106
Net income						29,132	29,132
Issuance of restricted stock upon early exercise of options ,shares				237
Issuance of common stock				1	157,256		157,257
Issuance of common stock, shares				9,065
Issuance of common stock follow on offering					26,855		26,855
Issuance of common stock follow on offering, shares				1,400
Issuance of common stock upon exercise of stock options, vesting of restricted stock units and other common stock issuances					2,835		2,835
Issuance of common stock upon exercise of stock options, vesting of restricted stock units and other common stock issuances, shares				1,269
Conversion of preferred stock into shares of common stock			(62,793)	3	62,790		62,793
Conversion of preferred stock into shares of common stock, shares			(26,230)	26,230
Tax benefit of equity award deductions					2,302		2,302
Other					(5)		(5)
Balance at Dec. 31, 2011				$ 5	$ 259,292	$ 39,787	$ 299,084
Balance, shares at Dec. 31, 2011				49,145

Consolidated Statements Of Redeemable Convertible Preferred Stock And Stockholders' Equity (Deficit) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended			12 Months Ended		12 Months Ended
	Dec. 31, 2009 Series B Redeemable Convertible Preferred Stock [Member]	Dec. 31, 2010 Series C Redeemable Convertible Preferred Stock [Member]	Dec. 31, 2011 Initial Public Offering [Member]	Dec. 31, 2011 Initial Public Offering [Member] Common Stock [Member]	Dec. 31, 2011 Secondary Offering [Member]	Dec. 31, 2011 Secondary Offering [Member] Common Stock [Member]
Stock issued, issuance costs	$ 1,441	$ 20		$ 2,915		$ 540
Issuance of common stock, issue price			$ 19		$ 20.49

Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities
Net income	$ 29,132	$ 13,871	$ 1,934
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	63,446	43,332	17,325
Stock-based compensation	6,996	1,246	227
Loss on sale of patent assets, net		536
Excess tax benefit from stock-based compensation	(2,302)
Imputed interest on other obligations	727	1,649	1,771
Amortization of premium on investments	1,086
Reversal of deferred tax valuation allowance			(3,478)
Deferred taxes	5,624	7,057
Other	8	13	20
Changes in assets and liabilities (net of effect of acquisitions):
Accounts receivable	(3,528)	(5,521)	(7,069)
Prepaid expenses and other assets	(12,085)	(6,014)	(68)
Accounts payable	332	(347)	614
Accrued and other liabilities	5,198	6,563	1,686
Deferred revenue	25,714	57,749	4,620
Net cash provided by operating activities	120,348	120,134	17,582
Cash flows from investing actives
Decrease (increase) in restricted cash	73	(220)
Purchases of investments classified as available-for-sale	(202,430)
Maturities of investments classified as available-for-sale	78,246
Business acquisitions	(3,345)
Purchases of intangible assets	(112)
Purchases of property and equipment	(1,971)	(544)	(27)
Acquisitions of patent assets	(101,170)	(72,097)	(38,542)
Proceeds from sale of patent assets	80	500	15,032
Net cash used in investing activities	(230,629)	(72,361)	(23,537)
Cash flows from financing activities
Repayments of principal on notes payable and other obligations	(19,254)	(30,471)	(13,252)
Proceeds from issuance of common stock in initial public offering, net of issuance costs	157,478	(221)
Proceeds from issuance of common stock in follow-on offering, net of issuance costs	26,855
Proceeds from exercise of stock options and other common stock issuances	2,993	104
Payments for the purchase of common stock		(3,238)
Excess tax benefit from stock-based compensation	2,302
Net cash provided by (used in) financing activities	170,374	(30,045)	20,567
Net increase in cash and cash equivalents	60,093	17,728	14,612
Cash and cash equivalents at beginning of period	46,656	28,928	14,316
Cash and cash equivalents at end of period	106,749	46,656	28,928
Supplemental disclosures of cash flow information
Cash paid for interest	1,216	3,686	2,663
Cash paid for income taxes	9,000	6,110	4
Non-cash investing and financing activities
Conversion of redeemable convertible preferred stock to common stock	62,793
Patent assets purchased or financed through notes payable or other obligations		14,542	19,840
Adjustments to patent asset purchase price and related liability			2,616
Patent assets received in barter transactions			3,176
Change in patent assets purchased and accrued but not paid	(2,000)	2,000
Intangible assets received in barter transactions	120
Change in initial public offering-related costs accrued but not paid	(260)	260
Series B Redeemable Convertible Preferred Stock [Member]
Cash flows from financing activities
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs			33,819
Series C Redeemable Convertible Preferred Stock [Member]
Cash flows from financing activities
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs		$ 3,781

Summary Of The Business	12 Months Ended
Summary Of The Business	Dec. 31, 2011
Summary Of The Business [Abstract]
Summary Of The Business	1. Summary of the Business RPX Corporation (also referred to herein as "RPX" or the "Company") helps companies reduce patent-related risk and expense. The Company provides a subscription-based patent risk management solution that facilitates more efficient exchanges of value between owners and users of patents compared to transactions driven by actual or threatened litigation. The core of the Company's solution is defensive patent aggregation, in which it acquires patents or licenses to patents, which the Company refers to collectively as "patent assets," that are being or may be asserted against the Company's current and prospective clients. The Company's clients pay an annual subscription fee and in return, receive a license from the Company to substantially all of its patent assets. The Company also provides its clients access to its proprietary patent market intelligence and data. The Company was incorporated in the State of Delaware on July 15, 2008. *Liquidity and Capital Resources* In May 2011, the Company completed its initial public offering ("IPO") of its common stock in which the Company issued 9,065,000 common shares and received cash proceeds of $160.2 million, net of underwriting discounts and commissions. The Company incurred offering costs of $2.9 million. Prior to the IPO, substantially all of the Company's operations and patent asset acquisitions had been financed through the private sale of equity securities, subscription fees collected from its clients and patent-seller financing. The Company completed a follow-on offering of its common stock in September 2011, in which it sold 1,400,000 common shares and raised $27.4 million after deducting underwriting discounts and commissions. In connection with this offering, the Company incurred offering costs of $0.5 million. As of December 31, 2011 and 2010, the Company had cash, cash equivalents, and investments of and $233.7 million and $46.7 million, respectively, and retained earnings of $39.8 million and $10.7 million, respectively. Management expects that it will use substantial cash in the future to acquire additional patent assets. Management believes that its existing cash, cash equivalents, investments, and contractual payments due from existing clients will be sufficient to meet its working capital and capital expenditure needs for at least the next 12 months.

Significant Accounting Policies

12 Months Ended

Dec. 31, 2011

Significant Accounting Policies[Abstract]

Significant Accounting Policies

2. Significant Accounting Policies

Basis of Consolidation and Presentation of Financial Information

The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") and include the accounts of RPX and its wholly owned subsidiaries. Intercompany transactions and balances have been eliminated. Management performed an evaluation of the Company's activities through the date of filing of this Annual Report on Form 10-K, and has concluded that there are no subsequent events requiring disclosure through that date, except as discussed in Note 19.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, contingent assets and liabilities, and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and reported amounts of revenues and expenses during the reporting period covered by the consolidated financial statements and accompanying notes. The Company bases its estimates on various factors and information which may include, but are not limited to, history and prior experience, expected future results, new related events and current economic conditions, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ materially from those estimates.

Revenue Recognition

The Company recognizes revenue in accordance with ASC 605, Revenue Recognition ("ASC 605") and related authoritative guidance. The primary source of the Company's revenue is fees paid by its clients under subscription agreements. The Company believes that its patent risk management solution comprises a single deliverable and thus the Company recognizes each subscription fee ratably over the non-cancelable term for which the fee applies. Revenue is recognized net of any discounts or other contractual incentives. The Company starts recognizing revenue when all of the following criteria have been met:

•

Persuasive evidence of an arrangement exists. All subscription fees are supported by a dually executed subscription agreement.

•

Delivery has occurred or services have been rendered. The subscription agreement calls for the Company to provide its patent risk management solution over a specific term commencing on the agreement effective date. Because services are not on an individualized basis (i.e., the Company generally performs its services on behalf of all of its clients as opposed to each client individually), delivery occurs automatically with the passage of time. Consequently, the Company recognizes subscription revenue ratably.

•

Seller's price to the buyer is fixed or determinable. Each client's annual subscription fee is based on the Company's fee schedule in effect at the time of the client's initial agreement. A client's subscription fee is calculated using its fee schedule and its normalized operating income, which is defined as the greater of (i) the average of the three most recently reported fiscal year's operating income and (ii) 5% of the most recently reported fiscal years' revenue. The fee for the first year of the agreement is typically determined and invoiced at the time of contract execution. The fee for each subsequent year of the agreement is generally calculated and invoiced in advance prior to each anniversary date of the agreement.

•

Collectability is reasonably assured. Subscription fees are generally collected on or near the effective date of the agreement and again at or near each anniversary date thereof. The Company does not recognize revenue in instances where collectability is not reasonably assured. Generally, the Company's subscription agreements state that all fees paid are non-refundable.

In some limited instances, the subscription agreement includes a contingency clause, giving one or both parties an option to terminate the agreement and receive a full refund if contingencies are not resolved within a defined time period. In those instances, revenue will not be recognized until all contingencies have been removed. The revenue earned during the period between the effective date of the agreement and the contingency removal date is recognized on the contingency removal date. Thereafter, revenue is recognized ratably over the remaining subscription term.

To the extent that the Company is contractually able, the Company grants its clients a term license to, and a release from all prior damages associated with, each patent asset in the Company's portfolio. The term license to each patent asset converts to a perpetual license at the end of a contractually specified vesting period, provided that the client is a member at such time. The Company does not view the conversion from term license to perpetual license to be a separate deliverable in its arrangements with its clients because the utility of, access to and freedom to practice the inventions covered by the patent asset is no different between a term and perpetual license. The Company does not view providing longer term access to the patent asset as a new deliverable separate from the term license.

In some instances, the Company accepts a payment from a client to finance part or all of an acquisition. The Company refers to such transactions as structured acquisitions. Structured acquisitions where the Company accepts payment from more than one client is referred to as a syndicated acquisition. The accounting for structured acquisitions is complex and often requires judgments on the part of management as to the appropriate accounting treatment. In accordance with ASC 605-45, Revenue Recognition: Principal Agent Considerations, in instances where the Company substantively acts as an agent to acquire patent rights from a seller on behalf of clients who are paying for such rights separately from their subscription agreements, the Company may treat the client payments on a net basis. When treated on a net basis, there may be little or no revenue recognized for such contributions, and the basis of the acquired patent rights may exclude the amounts paid by the contributing client based on the Company's determination that it is not the principal in these transactions. In these situations, where the Company substantively acts as an agent, the contributing clients are typically defendants in an active or threatened patent infringement litigation filed by the owner of a patent. The Company's involvement is to assist its clients to secure a dismissal from litigation and a license to the underlying patents.

Key indicators evaluated to reach the determination that the Company is not the principal in the transaction include:

•

the seller of the patent assets is generally viewed as the primary obligor in the arrangement, given that it owns and controls the underlying patent(s) and thus has the absolute authority to grant and deliver any release from past damages and dismissal from litigation, as well the general terms of the license granted;

•

the Company has no inventory risk, as the clients generally enter into their contractual obligations with the Company prior to or contemporaneous to the Company entering into its contractual obligation with the seller;

•

the Company is not involved in the determination of the product or service specification and has no ability to change the product or perform any part of the service in connection with these transactions, as the seller owns the underlying patent(s); and

•

the Company has limited or no credit risk, as each respective client has a contractually binding obligation, and in many instances the Company collects the client contribution prior to making a payment to the seller.

Accounting for Payments to Clients

The Company occasionally agrees to provide payments, discounts or other contractual incentives to clients in exchange for specified consideration. The Company accounts for such contract provisions in accordance with ASC 605-50, Revenue Recognition: Customer Payments and Incentives, which requires the Company to offset the amount of the payment, discount or other contractual incentive against revenue if the Company is unable to demonstrate both receipt of an identifiable benefit and determine the fair value of the benefit received.

Deferred Revenue

The Company generally invoices its clients upon execution of new subscription agreements and prior to any payment date for existing subscription agreements. The Company records the amount of subscription fees billed as deferred revenue and recognizes such amounts as revenue ratably over the period for which they apply. The Company records deferred revenue when it has the legal right to bill and collect amounts owed and the respective underlying term of the subscription has begun. In the rare instance where a subscription term has commenced but the fees have not yet been invoiced, the Company records an unbilled receivable. Deferred revenue that will be recognized during the succeeding 12-month period from the respective balance sheet date is recorded as deferred revenue, current, and the remaining portion is recorded as non-current.

Accounts Receivable

Accounts receivable primarily includes amounts billed to clients under their subscription agreements. The majority of the Company's clients are well-established operating companies with investment-grade credit. For the periods ended December 31, 2011 and 2010, the Company has not incurred any losses on its accounts receivable. Based upon its historical collections experience and specific client information, the Company has determined that no allowance for doubtful accounts was required at either December 31, 2011 or 2010.

Concentration of Risk

The Company is subject to concentrations of credit risk principally attributable to cash, cash equivalents, investments, and accounts receivable. The Company's cash balances (both, restricted and non-restricted) deposited in U.S. banks are non-interest bearing and are insured up to the Federal Deposit Insurance Corporation ("FDIC") limits. Cash equivalents primarily consist of institutional money market funds, U.S. government and agency securities, municipal bonds and commercial paper denominated primarily in U.S. dollars.

Credit risk with respect to accounts receivable is generally mitigated by short collection periods and/or subscription agreements that provide for payments in advance of the rendering of services. Four clients accounted for 26%, 20%, 14% and 12% of accounts receivable at December 31, 2011. Three clients accounted for 45%, 33%, and 22% of accounts receivable at December 31, 2010. No client accounted for more than 10% of subscription fee revenue for the years ended December 31, 2011 or 2010. Five clients accounted for 15%, 12%, 11%, 10% and 10% of subscription fee revenue for the year ended December 31, 2009.

Fair Value Measurements

The Company adopted the provisions of ASC 820, Fair Value Measurements and Disclosures ("ASC 820"), at its inception on July 15, 2008, for financial assets and liabilities that are being measured and reported at fair value on a recurring basis. Under this standard, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the "exit price") in an orderly transaction between market participants at the measurement date. ASC 820 establishes a hierarchy for inputs used in measuring fair value that minimizes the use of unobservable inputs by requiring the use of observable market data when available. Observable inputs are inputs that market participants would use in pricing the asset or liability based on active market data. Unobservable inputs are inputs that reflect the Company's assumptions about the assumptions market participants would use in pricing the asset or liability based on the best information available in the circumstances.

The fair value hierarchy is comprised of the three input levels summarized below:

Level 1 – Valuations based on quoted prices in active markets for identical assets or liabilities and readily accessible by the Company at the reporting date.

Level 2 – Valuations based on inputs other than quoted prices included within Level 1 that are observable for assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.

Level 3 – Valuations based on inputs that are unobservable.

The carrying amounts of the Company's financial instruments, which include cash, cash equivalents, investments, accounts receivable and accounts payable, approximate their fair values due to their short maturities. Based on borrowing rates currently available to the Company for notes payable and other deferred payment obligations with similar terms, and considering the Company's credit risk, the carrying value of notes payable approximates fair value.

Cash and Cash Equivalents

The Company's cash and cash equivalents principally consists of institutional money market funds, corporate bonds, municipal bonds and commercial paper denominated primarily in U.S. dollars. Cash equivalents are highly liquid, short-term investments having an original maturity of 90 days or less that are readily convertible to known amounts of cash.

Short-Term Investments

The Company holds short-term investments in U.S. government and agency securities, commercial paper corporate bonds, and municipal bonds with maturities greater than 90 days. The Company considers its investments as available to support current operations. As a result, the Company classifies its investments including those with stated maturities beyond twelve months, as current assets in the accompanying consolidated balance sheets. The Company classifies these securities as "available-for-sale," and carries them at fair value on the consolidated balance sheets. Any unrealized gains or losses are recorded, net of estimated taxes, in accumulated other comprehensive income, a component of stockholders' equity. Realized gains and losses are recognized upon sale. The specific identification method is used to determine the cost basis of fixed income securities sold.

The Company periodically evaluates its investments for impairment due to declines in market value considered to be "other-than-temporary." This evaluation consists of several qualitative and quantitative factors, including the Company's ability and intent to hold the investment until a forecasted recovery occurs, as well as any decline in the investment quality of the security and the severity and duration of the unrealized loss. In the event of a determination that a decline in market value is other-than-temporary, the Company will recognize an impairment loss, and a new cost basis in the investment will be established. To date, the Company has not recorded any impairment related to its investments in its consolidated statements of operations.

Restricted Cash

The Company had restricted cash pledged under two lines of credit totaling $647,000 and $720,000 at December 31, 2011 and 2010, respectively. See Note 11.

Property and Equipment

Property and equipment are stated at cost less accumulated depreciation. Depreciation is computed using a straight-line method over the estimated useful lives of the related assets, which is generally three to five years. Maintenance and repairs are charged to expense as incurred, and improvements and betterments are capitalized. When assets are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the consolidated balance sheet and any resulting gain or loss is reflected in the consolidated statement of operations in the period realized. Leasehold improvements are amortized on a straight-line basis over the terms of the lease, or the useful life of the assets, whichever is shorter.

Internal-Use Software and Website Development Costs

The Company capitalizes development costs related to internal-use software and its website and records such amounts as property and equipment, net, on its consolidated balance sheets. These costs include personnel and personnel-related expenses and consultant fees incurred during the application development stages of the project. Costs related to preliminary project activities, minor enhancement and maintenance, and post implementation activities are expensed as incurred. Internal-use software is amortized on a straight-line basis over its useful life, which is generally three years, beginning on the date the software is placed into service. Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets.

During the year ended December 31, 2011, the Company capitalized $1.2 million of internal-use software and website development costs. No amount was capitalized during the year ended December 31, 2010. Amortization of internal-use software was $134,000 for the year ended December 31, 2011. There was no amortization of internal-use software during the years ended December 31, 2010 and 2009.

Patent Assets

The Company generally acquires patent assets from third parties using cash and contractual deferred payments. Patent assets are recorded at fair value. The fair value of the assets acquired is generally based on the fair value of the consideration exchanged. The asset value includes the cost of legal and other fees associated with the acquisition of the assets. Costs incurred to maintain and prosecute patents and patent applications are expensed as incurred.

Because each client receives a license to the vast majority of the Company's patent assets, the Company is unable to reliably determine the pattern over which its patent assets are consumed. As a result, the Company amortizes each patent asset on a straight-line basis. Generally, the amortization period is equal to the shorter of the asset's estimated useful life and the remaining statutory life. Estimating the economic useful life of patent assets requires significant management judgment. The Company considers various factors in estimating the economic useful lives of its patent assets, including the applicability of the assets to future clients, the vesting period for current clients to obtain perpetual licenses to such patent assets, any contractual commitments by clients that are related to such patent assets, its estimate of the period of time during which the Company may sign subscription agreements with prospective clients that may find relevance in the patent assets, the vesting period for which such clients earn the right to a perpetual license in the asset and the remaining contractual term of the Company's existing clients at the time of acquisition. In instances where the Company obtains patent rights that have related client committed cash flows that extend beyond the statutory life of the underlying patents, the useful life may extend beyond the statutory life of the patents. As of December 31, 2011 and 2010, the estimated economic useful life of the Company's patent assets generally ranged from 24 to 60 months and as of December 31, 2011 the weighted average estimated economic useful life was 49 months. The Company periodically evaluates whether events and circumstances have occurred that may warrant a revision to the remaining estimated useful life of its patent assets.

In instances where the Company sells patent assets, the amount of consideration received is compared to the asset's carrying value to determine and recognize a gain or loss.

Patent Asset Financing

The Company may use seller financing in the form of notes payable or contractually deferred payments for acquisitions of patent assets. In such cases, the acquired assets may serve as collateral or be otherwise encumbered during the term of the financing. Contractual amounts owed under such financing arrangements are recorded at fair value using a market rate of interest. If such financing arrangements do not have a stated interest rate, the Company imputes interest at a market rate (thereby discounting the future payments to present value) to account for the time-value-of-money component of the asset purchase. The difference between the contractual amounts due and the present value is recognized as interest expense over the period the payments are due. The Company records a corresponding patent asset for any such contractual obligations. Amounts due within approximately one year of the date of the acquisition under financing arrangements with no stated interest rate are recorded at face value. The interest component is imputed, if necessary, at the time of acquisition by using the then-current market yield of an index of comparable maturity securities with a credit rating comparable to that of the Company.

Impairment of Long-Lived Assets

The Company assesses the recoverability of its long-lived assets, which includes patent assets, other intangible assets and property and equipment, when events or changes in circumstances indicate their carrying value may not be recoverable. Such events or changes in circumstances may include: a significant adverse change in the extent or manner in which a long-lived asset is being used, a significant adverse change in legal factors or in the business climate that could affect the value of a long-lived asset, an accumulation of costs significantly in excess of the amount originally expected for the acquisition or development of a long-lived asset, current or future operating or cash flow losses that demonstrate continuing losses associated with the use of a long-lived asset or a current expectation that, more-likely-than-not, a long-lived asset will be sold or otherwise disposed of significantly before the end of its previously estimated useful life. The Company licenses the portfolio of patent assets to all of its clients and thus views these assets as a single asset group. The Company assesses recoverability of a long-lived asset by determining whether the carrying value of these assets can be recovered through projected undiscounted cash flows. If the carrying value of the assets exceeds the forecasted undiscounted cash flows, an impairment loss is recognized, and is recorded as the amount by which the carrying value exceeds the estimated fair value. An impairment loss is charged to operations in the period in which management determines such impairment. To date, there have been no impairments of long-lived assets identified.

Assets Held for Sale

The Company classifies assets as held for sale when certain criteria are met, including: management's commitment to a plan to sell the assets; the availability of the assets for immediate sale in their present condition; whether an active program to locate buyers and other actions to sell the assets has been initiated; whether the sale of the assets is probable and their transfer is expected to qualify for recognition as a completed sale within one year; whether the assets are being marketed at reasonable prices in relation to their fair value; and how likely it is that significant changes will be made to the plan to sell the assets. There were no assets held for sale at December 31, 2011. The Company had one patent asset held for sale for $80,000 at December 31, 2010, which was recorded as a component of prepaid expenses and other current assets in the consolidated balance sheets. The related patent sale transaction was completed in January 2011.

Goodwill

Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. The Company evaluates goodwill for impairment on an annual basis during its third fiscal quarter or whenever events and changes in circumstances suggest that the carrying amount may not be recoverable. Because the Company has one reporting unit, the Company utilizes the entity-wide approach to assess goodwill for impairment. There have been no impairments of goodwill recorded in the Company's consolidated statements of operations through December 31, 2011.

Intangible Assets, Net

Intangible assets, net primarily consists of intangible assets acquired from other companies as a result of acquisitions. Such assets are capitalized and amortized on a straight-line basis over the estimated useful life of the intangible assets. Intangible assets, net excludes patent related intangible assets, which are recorded within patent assets, net in the accompanying consolidated balance sheets.

Comprehensive Income

Comprehensive income consists of net income and charges or credits to stockholders' equity primarily related to changes in unrealized gains or losses on marketable securities, net of taxes. For the periods presented, the Company's comprehensive net income approximates its net income, therefore no separate components of comprehensive income are provided.

Advertising Costs

The Company expenses advertising costs as they are incurred. Advertising expenses were not material for any of the periods presented.

Foreign Currency Accounting

The Company's subscription agreements are denominated in U.S. dollars; however, several of the Company's clients report revenue and operating income in foreign currencies. As subscription fees are determined using the reported revenue and operating income of the Company's clients, a significant sustained change in exchange rates could result in a change in subscription fees from clients reporting revenue and operating income in a currency other than the U.S. dollar. The Company's expenses are incurred primarily in the United States, with a small portion of expenses incurred and denominated in Japanese Yen and the Euro. The functional currency of the Company's international subsidiaries is the U.S. dollar. Monetary assets and liabilities are remeasured using the current exchange rate at the balance sheet date. Non-monetary assets and liabilities and capital accounts are remeasured using historical exchange rates. Expenses are remeasured using the average exchange rates in effect during the period. Foreign currency exchange gains and losses, which have not been material for any periods presented, are included in the consolidated statements of operations under other income (expense), net.

Income Taxes

The Company accounts for income taxes using an asset and liability approach, which requires the recognition of deferred tax assets or liabilities for the tax-effected temporary differences between the financial reporting and tax bases of its assets and liabilities and for net operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized.

The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income, and to the extent the Company believes that recovery is not likely, the Company establishes a valuation allowance. Judgment is required in determining the Company's provision for income taxes, deferred tax assets, and liabilities and any valuation allowance recorded against the net deferred tax assets. The Company had not applied a valuation allowance against its deferred tax balances for the years ended December 31, 2011 or 2010.

The calculation of the Company's tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations in a multitude of jurisdictions across its global operations. ASC 740 provides that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, on the basis of the technical merits. ASC 740 also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition.

The Company recognizes tax liabilities in accordance with ASC 740 and it adjusts these liabilities when its judgment changes as a result of the evaluation of new information not previously available. Because of the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from its current estimate of the tax liabilities. These differences will be reflected as increases or decreases to income tax expense in the period in which new information is available.

Stock-Based Compensation

The Company accounts for stock-based compensation under ASC 718, Compensation-Stock Compensation ("ASC 718"). ASC 718 requires that compensation expense for all equity-settled awards made to employees and directors be measured and recognized based on estimated grant date fair values. These equity awards include stock options and restricted stock units ("RSUs"). Stock-based compensation expense for RSUs granted to employees and directors is measured based on the fair market value of the Company's common stock on the date of grant. Stock-based compensation expense for stock options awarded to employees and directors is estimated based on the fair value of each stock option using an option pricing model. The value of awards expected to vest is recognized as expense on a straight-line basis over the requisite service period.

The Company accounts for stock-based compensation for equity-settled awards issued to non-employees in exchange for goods and services under ASC 505-50, Equity-Based Payments to Non-Employees ("ASC 505-50"). ASC 505-50 requires that equity awards issued to non-employees be measured at the fair value as of the date at which either the commitment for performance by the non-employee to earn the award is reached or the date the non-employee's performance is complete. Until that point is reached, the award must be revalued at each reporting period with the true-up to expense recorded in the then current period earnings. The value of the award is recognized as an expense over the requisite service period.

The Company selected the Black-Scholes option pricing model as the most appropriate method for determining the estimated fair value for stock options. The Black-Scholes model requires the use of highly subjective and complex assumptions which determine the fair value of stock-based awards, including the option's expected term and the price volatility of the underlying stock. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. See Note 15.

Recent Accounting Pronouncements

In September 2011, the FASB issued Accounting Standard Update ("ASU") No. 2011-08 Intangibles and Other (Topic 350), Testing Goodwill for Impairment ("ASU 2011-08") which permits an entity to make a qualitative assessment of whether it is more-likely-than-not that a reporting unit's fair value is less than its carrying value before applying the two-step goodwill impairment model that is currently in place. If it is determined through the qualitative assessment that a reporting unit's fair value is more-likely-than-not greater than its carrying value, the remaining impairment steps would not be necessary. The qualitative assessment is optional, allowing companies to go directly to the quantitative assessment. ASU 2011-08 is effective for annual and interim goodwill impairment tests performed in fiscal years beginning after December 15, 2011. Early adoption is permitted. The Company early adopted this guidance for the year ended December 31, 2011 and the adoption did not have a material impact on the Company's consolidated financial position, results of operations, or cash flows.

In June 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") No. 2011-05, Presentation of Comprehensive Income ("ASU 2011-05"). ASU 2011-05 eliminates the option to present the components of other comprehensive income as part of the statement of shareholders' equity. Instead, the Company must report comprehensive income in either a single continuous statement of comprehensive income which contains two sections, net income and other comprehensive income, or in two separate but consecutive statements. ASU 2011-05 does not change the items that must be reported in other comprehensive income or when an item of other comprehensive income must be reclassified to net income. ASU 2011-05 is effective retrospectively for fiscal years, and interim periods within those years, beginning after December 15, 2011. Early adoption is permitted. The adoption of this guidance is not expected to have material impact on the Company's consolidated financial position, results of operations, or cash flows.

In May 2011, the FASB issued ASU 2011-04, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS ("ASU 2011-04"). The amendments in ASU 2011-04 result in common fair value measurement and disclosure requirements in U.S. GAAP and IFRS. Consequently, ASU 2011-04 changes the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the FASB does not intend for the amendments in ASU 2011-04 to result in a change in the application of the requirements in Topic 820. ASU 2011-04 is effective prospectively for interim and annual reporting periods beginning after December 15, 2011. The adoption of this guidance is not expected to have material impact on the Company's consolidated financial position, results of operations, or cash flows.

- Definition

The entire disclosure for all significant accounting policies of the reporting entity.

+ References+ Details

Net Income Attributable To Common Stockholders And Net Income Per Share

12 Months Ended

Dec. 31, 2011

Net Income Attributable To Common Stockholders And Net Income Per Share[Abstract]

Net Income Attributable To Common Stockholders And Net Income Per Share

3. Net Income Attributable to Common Stockholders and Net Income Per Share

Upon the Company's initial public offering in May 2011, all shares of the Company's redeemable convertible preferred stock were converted to common stock. Basic and diluted net income per share attributable to common stockholders are presented in conformity with the two-class method required for participating securities. Holders of shares of Series A, Series A-1, Series B and Series C redeemable convertible preferred stock were each entitled to receive 8% per annum non-cumulative dividends, payable prior and in preference to any dividends on common stock. In addition, the holders of restricted common stock were entitled to receive non-forfeitable dividends if declared.

Under the two-class method, basic net income per share attributable to common stockholders is computed by dividing the net income attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Net income attributable to common stockholders is determined by allocating undistributed earnings, calculated as net income less current period shares of Series A, Series A-1, Series B and Series C redeemable convertible preferred stock non-cumulative dividends, among common stockholders, restricted stockholders and Series A, Series A-1, Series B and Series C redeemable convertible preferred stockholders. Diluted net income per share attributable to common stockholders is computed by using the weighted-average number of shares of common stock outstanding, including potential dilutive shares of common stock, assuming the dilutive effect of outstanding stock options using the treasury stock method.

The following table presents the calculation of basic and diluted net income per share available to common stockholders:


	Years Ended December 31,
	2011		2010		2009
Numerator:
Net income	$	29,132	$	13,871	$	1,934
Less: Allocation of net income to participating shares		9,435		12,479		1,934

Numerator for basic calculation		19,697		1,392		—
Undistributed earnings re-allocated to common stock holders		613		279		—

Numerator for diluted calculation	$	20,310	$	1,671	$	—

Denominator:
Denominator for basic calculation, weighted-average number of shares of common stock outstanding		32,032		5,747		2,148
Dilutive effect of options using treasury-stock method		3,888		1,417		21

Denominator for diluted calculation		35,920		7,164		2,169

Net income per common share:
Basic net income per share of common stock	$	0.61	$	0.24	$	—

Diluted net income per share of common stock	$	0.57	$	0.23	$	—

For the years ended December 31, 2011, 2010 and 2009, the following securities were not included in the calculation of diluted shares outstanding, as the effect would have been anti-dilutive (in thousands):


	Years Ended December 31,
	2011		2010		2009
Weighted-average outstanding options		520		—		291
Weighted-average redeemable convertible preferred stock		9,270		25,810		19,466
Weighted-average common stock subject to repurchase		3,114		5,529		9,061
Weighted-average number of Restricted Stock Units outstanding		76		—		—

- Definition

The entire disclosure for earnings per share.

+ References+ Details

Fair Value Measurements

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

Fair Value Measurements

4. Fair Value Measurements

The Company's financial assets are valued using market prices on both active markets ("Level 1") and less active markets ("Level 2"). Level 1 instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets. Level 2 instrument valuations are obtained from readily available pricing sources for comparable instruments. As of December 31, 2011 and 2010, the Company did not have any financial assets without observable market values that would require a high level of judgment to determine fair value ("Level 3").

The following tables present the financial assets measured at fair value on a recurring basis as of December 31, 2011 and 2010 (in thousands):


	December 31, 2011
	Total Balance		Level 1		Level 2
Cash equivalents ⁽¹⁾
Money market funds	$	21,504	$	21,504	$	—
Commercial paper		24,405		—		24,405
Municipal bonds		8,385		—		8,385
Corporate bonds		2,045		—		2,045

	$	56,339	$	21,504	$	34,835

Short-term investments
Commercial paper	$	4,850	$	—	$	4,850
Municipal bonds		65,675		—		65,675
Corporate bonds		6,828		—		6,828
U.S. government and agency securities		49,623		—		49,623

	$	126,976	$	—	$	126,976


	December 31, 2010
	Total Balance		Level 1		Level 2
Money market funds⁽¹⁾	$	36,560	$	36,560	$	—

⁽¹⁾	These assets are included within cash and cash equivalents in the consolidated balance sheets.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13504-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44A, 44B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15C, 15D

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15A

-Subparagraph a-d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15B

-Subparagraph a, b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 3, 10, 14, 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32, 33, 34

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 17-22, 27, 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

+ Details

Investments

12 Months Ended

Dec. 31, 2011

Investments [Abstract]

Investments

5. Investments

The following table presents the Company financial assets measured at fair value on a recurring basis (in thousands):


	December 31, 2011
	Amortized Cost		Unrealized								Fair Value
	Amortized Cost		Gross Gains		Gross Losses			Net Loss			Fair Value
Money market funds	$	21,504	$	—	$	—		$	—		$	21,504
Commercial paper		29,255		—		—			—			29,255
Municipal bonds		74,075		3		(18	)		(15	)		74,060
Corporate bonds		8,887		—		(14	)		(14	)		8,873
U.S. government and agency securities		49,615		8		—			8			49,623

	$	183,336	$	11	$	(32	)	$	(21	)	$	183,315


	December 31, 2010
	Amortized Cost		Unrealized						Fair Value
	Amortized Cost		Gross Gains		Gross Losses		Net Gain (Loss)		Fair Value
Money market funds	$	36,560	$	—	$	—	$	—	$	36,560

The remaining maturity of the Company's investment portfolio was less than one year at December 31, 2011 and 2010. As of December 31, 2011, no individual securities incurred continuous unrealized losses for greater than 12 months. The Company did not have any realized gains (losses) on marketable securities during any of the periods presented.

Patent Assets

12 Months Ended

Dec. 31, 2011

Patent Assets[Abstract]

Patent Assets

6. Patent Assets

The following table presents the changes in the carrying value of patent assets (in thousands):


	December 31,
	2011			2010
Balance, beginning of period	$	126,508		$	82,759
Acquisition of patent assets		99,171			88,639
Reclass to assets held-for-sale		—			(80	)
Sale of patent assets		—			(500	)
Loss on sale of patent assets		—			(1,423	)
Amortization expense		(62,327	)		(42,887	)

Balance, end of period	$	163,352		$	126,508

The Company's acquired patent assets relate to technologies used or supplied by companies in a variety of market sectors, including consumer electronics, e-commerce, financial services, media distribution, mobile communications, networking, semiconductors, and software. The Company amortizes each acquired portfolio of patent assets on a straight-line basis over its estimated economic useful life. As of December 31, 2011 and 2010, the estimated economic useful lives of the Company's patent assets generally ranged from 24 to 60 months. As of December 31, 2011, the weighted average original estimated economic useful life was 49 months.

The following table summarizes the expected future annual amortization expense of patent assets as of December 31, 2011 (in thousands):


Year Ending
2012	$	64,382
2013		49,796
2014		27,137
2015		15,380
2016		6,657

Total estimated future amortization expense	$	163,352

Amortization expense was approximately $62.3 million, $42.9 million and $16.9 million for the years ended December 31, 2011, 2010, and 2009, respectively.

Structured Acquisitions

Structured acquisitions are transactions involving patent assets that may cost more than the Company is prepared to spend with its own capital resources or that are relevant only to a very small number of clients. In such transactions, the Company may work to acquire these assets with financial assistance from the particular clients against whom they are being or may be asserted. Such clients either pay amounts separate from their subscription fee or, less frequently, lend the Company funds to be used in the transaction. As discussed in the revenue recognition policy in Note 2, the Company may treat the contributions from the clients on a gross or net basis depending on the specific facts and circumstances of the transaction. In the event that such contributions are recognized on a net basis, the Company will capitalize the acquired asset that relates to its non-contributing clients. As a result, the cost basis of the acquired patent rights excludes the amounts paid by the contributing client.

Barter Transactions

During the year ended December 31, 2009, the Company entered into two transactions where it granted a subscription agreement to a client in exchange for patent assets. The Company accounts for non-monetary exchanges in accordance with ASC 845, Non-monetary Transactions ("ASC 845"), which requires non-monetary exchanges to be based on the fair value of the assets or services involved. ASC 845 further clarifies that the cost of the non-monetary asset acquired in exchange for another non-monetary asset is the fair value of the asset exchanged to obtain it. In each of the non-monetary transactions that the Company completed, the subscription agreement exchanged as consideration for the acquired patent assets was valued using the Company's standard fee schedule in effect, together with standard discounting practices offered at the time of the transaction. Given that this is the same pricing methodology that the Company uses in arm's-length monetary transactions, it considers the resulting value of the subscription agreement to be indicative of both its fair value and the fair value of the assets received. During the years ended December 31, 2011, 2010 and 2009, the total fair value of subscription services exchanged for patent assets was $120,000, $0 and $3.2 million, respectively. No gain or loss was recorded for either of these exchanges.

Sale of Patent Assets

During the year ended December 31, 2010, the Company entered into two patent asset sale transactions for total cash consideration of $500,000 resulting in a loss of $75,000. In October 2010, the Company committed to sell certain patent assets and accepted an offer from a third party to purchase these patent assets for $80,000 in November 2010 and reduced the carrying value accordingly. As a result, the Company recorded a $1.3 million loss, which is reflected in the consolidated statement of operations for the year ended December 31, 2010. This loss was partially offset by an $887,000 gain recognized in November 2010 from the forgiveness of a portion of the non-recourse financing secured by these patent assets. The Company recorded these patent assets as held for sale as a component of prepaids and other current assets on the consolidated balance sheet as of December 31, 2010 and the sale was consummated in January 2011.

No patent asset sales transactions occurred during the year ended December 31, 2011 and there were no assets held for sale at December 31, 2011.

Goodwill And Intangible Assets, Net

12 Months Ended

Dec. 31, 2011

Goodwill And Intangible Assets, Net [Abstract]

Goodwill And Intangible Assets, Net

7. Goodwill and Intangible Assets, Net

Acquisition of Businesses

In July, 2011, the Company acquired substantially all of the assets of an online provider of patent litigation docket data and related analytic reports in order to further enhance the Company's market intelligence and data analysis capabilities. All assets, except the business and marketing plan of the acquired company, were purchased in exchange for $0.4 million in cash. The purchase price was fully allocated to identifiable intangible assets. The transaction was accounted for as a business combination.

In June, 2011, the Company acquired substantially all of the assets of a patent research and intellectual property news provider for $3.0 million in cash. The acquisition expanded the Company's market intelligence and data analysis capabilities and was accounted for as a business combination. Identifiable intangible assets acquired of $1.3 million were recorded at their estimated fair value as of the acquisition date and the remaining balance of $1.7 million was allocated to goodwill. The goodwill pertained to cost benefits and operational synergies realized by applying the research capabilities inherent in the acquired company's business to other data and research systems at the Company. No cash or other tangible assets were acquired and no liabilities were assumed. Acquisition-related costs of $43,000 were expensed as incurred.

The Company included the effects of these business combinations in its consolidated results of operations prospectively from the date of the acquisition. Pro forma financial information for the acquisitions has not been presented, as the effects were not material to the Company's historical consolidated financial statements.

Goodwill

The Company had no goodwill recorded prior to 2011. The changes in the carrying amount of goodwill for the year ended December 31, 2011 were as follows (in thousands)


Balance as of December 31, 2010	$	—
Goodwill additions		1,675

Balance as of December 31, 2011	$	1,675

Intangible Assets, Net

Intangible assets, net at December 31, 2011 and 2010 consisted of (in thousands):


	Weighted Average Lives	December 31, 2011							December 31, 2010
	Weighted Average Lives	Carrying Amount		Accumulated Amortization			Net Carrying Amount		Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed technology	31 months	$	665	$	(128	)	$	537	$	—	$	—		$	—

Customer relationship	36 months		250		(49	)		201		—		—			—
Non-compete	24 months		80		(22	)		58		—		—			—
Trademarks	36 months		890		(165	)		725		—		—			—
Other intangible assets	48 months		1,450		(1,229	)		221		1,450		(867	)		583
Intangible assets in progress	N/A		95		—			95		—		—			—

		$	3,430	$	(1,593	)	$	1,837	$	1,450	$	(867	)	$	583

In connection with the issuance of the Series A convertible preferred stock in August 2008, the Company entered into a common stock repurchase agreement with its founders in exchange for intellectual property. The fair value of common stock exchanged for the intellectual property was estimated to be approximately $1.5 million based on the then-applicable common stock value of $0.145 per share, as the fair value of the common stock was more readily determinable than the fair value of the intellectual property transferred. These amounts are recorded as other intangible assets in the schedule above. The fair value of the assets received are being amortized over a four-year period from the date of the transaction and recorded as a component of selling, general and administrative expenses.

Amortization expense was $726,000, $363,000 and $363,000 during the years ended December 31, 2011, 2010 and 2009, respectively.

The following table summarizes the expected future annual amortization expense of other intangible assets (excluding intangible assets in progress) as of December 31, 2011 (in thousands):


Year ended December 31,
2012	$	872
2013		621
2014		249

Total estimated future amortization expense	$	1,742

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References+ Details

Property And Equipment, Net

12 Months Ended

Dec. 31, 2011

Property And Equipment, Net [Abstract]

Property And Equipment, Net

8. Property and Equipment, Net

Property and equipment, net is comprised of the following (in thousands):


	December 31,
	2011			2010
Computer equipment and software	$	666		$	399
Internal-use software		1,221			—
Furniture and fixtures		611			220
Leasehold improvements		139			56
Work-in-progress		178			53

		2,815			728
Less: Accumulated depreciation and amortization		(498	)		(105	)

Total property and equipment, net	$	2,317		$	623

Depreciation expense was $392,000, $82,000 and $18,000 during the years ended December 31, 2011, 2010 and 2009, respectively.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References+ Details

Notes Payable And Other Obligations

12 Months Ended

Dec. 31, 2011

Notes Payable And Other Obligations [Abstract]

Notes Payable And Other Obligations

10. Notes Payable and Other Obligations

Notes payable and other obligations consisted of the following (in thousands):


	December 31,
	2011			2010
Notes payable	$	—		$	7,579
Other obligations		5,056			16,004

		5,056			23,583
Less: Current portion		(5,056	)		(18,527	)

Total notes payable and other obligations, non-current	$	—		$	5,056

The Company's note payable and other obligations will be paid off during the year ending December 31, 2012, payoff will include the amount of unamortized discount of $94,000.

Notes Payable

On January 29, 2010, in conjunction with an acquisition of certain patent assets, the Company issued a full recourse, secured promissory note in the amount of $3.0 million due January 30, 2011. The note bore interest of 10% per annum. Upon the execution of a subscription agreement by any of certain named companies, the Company was required to make a prepayment in the amount defined in the agreement. Such prepayments were to be applied first, to any costs and expenses, second, to accrued interest and third, to principal. The acquired patent assets were pledged as security for the note. As of December 31, 2010, the note had been fully discharged and the associated security agreement terminated under its terms.

On January 27, 2010, the Company entered into a loan agreement with a client in order to partially finance the acquisition of certain patent assets from a third party. Under the terms of the agreement, the Company issued a promissory note payable in the amount of $2.0 million. The note bore interest of 0.57% per annum. The interest and the principal was payable in its entirety on the maturity date of April 1, 2011. The principal balance was recorded at fair value. The outstanding principal balance at December 31, 2010 was $2.0 million. The Company repaid the note in April 2011.

On November 2, 2009, the Company entered into a loan agreement with a client in order to finance the purchase of certain patent assets from a third party. Under the terms of the agreement, the Company issued a promissory note payable in the amount of $1.4 million. The principal balance was recorded at fair value and bore interest of 0.71% per annum. The interest was payable in annual installments and the principal was payable in its entirety on the maturity date of January 30, 2011. The note was non-recourse to the Company and was secured by the purchased patent assets. The outstanding principal due at December 31, 2009 was $1.4 million. In November 2010, a portion of the outstanding balance was forgiven in connection with the decision to sell the related patent assets. The gain on the forgiveness of such debt is presented as an offset against the loss on the sale of the related assets. The outstanding principal due at December 31, 2010 was $80,000. The remaining principal balance of $80,000 was paid in full in January 2011.

On October 7, 2008, the Company entered into a patent rights purchase and assignment agreement to purchase patent assets for a total of $15.0 million. Under the terms of the agreement, the Company paid $1.5 million in cash and issued a promissory note in the amount of $13.5 million bearing interest of 10% per annum and payable in quarterly installments over a three-year period ending October 7, 2011. The principal balance was recorded at fair value. The remaining principal due was $3.4 million and $7.9 million at December 31, 2010 and 2009, respectively. The Company's membership interest in its wholly-owned subsidiary that purchased the patent assets was pledged as collateral against the note. The Company repaid the note in full in June 2011.

On September 11, 2008, the Company entered into a patent rights purchase and assignment agreement to purchase patent assets for a total of $17.0 million. Under the terms of the agreement, the Company issued a promissory note in the amount of $17.0 million of which 10%, or $1.7 million, was paid up front. The note bears interest of 10% per annum. The principal and interest are payable in quarterly installments over a three-year period ending September 11, 2011. The principal balance was recorded at fair value. The remaining principal due was $2.1 million and $8.3 million at December 31, 2010 and 2009, respectively. The Company's membership interest in its wholly-owned subsidiary that purchased the patent assets was pledged as collateral against the note. The Company repaid the note in full in June 2011.

Other Obligations

On July 6, 2009, the Company entered into an agreement to purchase certain patent assets for a total of $4.4 million. Under the terms of the agreements, the Company paid $1.1 million in cash at signing, with a remaining non-interest bearing contract obligation of $3.3 million due in three equal installments in July of each of 2010, 2011 and 2012. The contract obligation was recorded at fair value utilizing the imputed interest rate method. Interest was imputed using a rate of 10.2% per annum, which represents the Company's estimated market borrowing rate as of the initial transaction date. As of December 31, 2011 and 2010, the remaining unpaid principal balance associated with the obligation was $1.1 million and $2.2 million, respectively.

On February 18, 2009, the Company entered into an agreement to acquire certain patent assets for a total of $12.0 million. Under the terms of the agreement, the Company paid $4.0 million upfront, with a remaining non-interest bearing contract obligation of $8.0 million due in two equal installments in February 2010 and 2011. The contract obligation was recorded at fair value utilizing the imputed interest rate method. Interest was imputed using a rate of 13.0% per annum, which represented the Company's estimated market borrowing rate as of the initial transaction date. As of December 31, 2010, the remaining unpaid principal balance associated with the obligation was $4.0 million. The Company repaid the remaining principal balance of $4.0 million in February 2011.

On January 26, 2009, the Company entered into an agreement to acquire certain patent assets for a total of $12.0 million. Under the terms of the agreement, the Company paid $3.0 million upfront, with a remaining non-interest bearing contract obligation of $9.0 million due in three equal installments in January 2010, 2011 and 2012. The contract obligation was recorded at fair value utilizing the imputed interest rate method. Interest was imputed using a rate of 13.9% per annum, which represented the Company's estimated market borrowing rate as of the date of the transaction. As of December 31, 2011 and 2010, the remaining unpaid principal balance associated with the obligation was $3.0 million and $6.0 million, respectively.

On December 16, 2008, the Company entered into agreements to acquire certain patent assets for a total of $2.2 million. Under the terms of the agreements, the Company paid $550,000 upfront, with a remaining non-interest bearing contract obligation of $1.7 million due in three equal installments in December 2011, 2010 and 2009. The contract obligation was recorded at fair value utilizing the imputed interest rate method. Interest was imputed using a rate of 10% per annum, which represented the Company's estimated market borrowing rate as of the initial transaction date. The remaining unpaid principal balance associated with the obligation was nil and $550,000 at December 31, 2011 and 2010, respectively.

Lines Of Credit	12 Months Ended
Lines Of Credit	Dec. 31, 2011
Lines Of Credit [Abstract]
Lines Of Credit	11. Lines of Credit On August 5, 2010, the Company entered into a standby letter of credit agreement with a banking institution. As of December 31, 2011, the credit facility provided for a $147,000 line of credit in support of a corporate real estate lease. The credit facility, which expires on June 14, 2013, is secured by a priority interest in the Company's savings account held with the banking institution in the amount of $147,000. The balance in this account has been classified as non-current restricted cash on the accompanying consolidated balance sheets. On September 23, 2008, the Company entered into a line of credit agreement with a banking institution. The credit facility provides for a $500,000 line of credit. Under the credit facility, a sub-facility of $300,000 is available for a Company-sponsored travel and expense credit card program, and a sub-facility of $200,000 is available under a revolving line of credit. Amounts borrowed under the $300,000 sub-facility, which terminates on April 5, 2012, will be charged a fixed rate of interest of 5% per year. Amounts borrowed under the $200,000 line of credit, which terminates on April 15, 2012, will be charged a variable interest rate equal to the greater of the banking institution's prime rate or 5%. The banking institution's prime rate at December 31, 2011 and 2010 was 3.25%. The credit is secured by a priority interest in the Company's savings account at the banking institution in the amount of $500,000. This amount has been classified as restricted cash on the consolidated balance sheets at December 31, 2011 and 2010. As of December 31, 2011 and 2010, balances under the corporate credit card are $153,000 and $108,000, respectively, and recorded in accounts payable on the consolidated balance sheets. There was no outstanding balance under the revolving line of credit at December 31, 2011 or 2010.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References+ Details

Commitments And Contingencies

12 Months Ended

Dec. 31, 2011

Commitments And Contingencies [Abstract]

Commitments And Contingencies

12. Commitments and Contingencies

Operating Lease Commitments

In July 2011, the Company entered into a non-cancelable operating lease agreement to sublease approximately 32,000 square feet of office space located in San Francisco, California. The future minimum lease payments under the sublease totaled approximately $1.2 million as of December 31, 2011. The Company also leases approximately 30,000 square feet of additional office space in San Francisco, California under two separate, non-cancelable agreements, which commenced in August 2010 and December 2009. All of the office space leases in San Francisco expire in April 2013. In November 2010, the Company entered into a non-cancelable lease agreement for approximately 1,400 square feet of office space in Japan, which expires in August 2013. Rent expense related to these non-cancelable operating leases was $1.7 million, $733,000 and $352,000 for the years ended December 31, 2011, 2010 and 2009, respectively.

The aggregate future non-cancelable minimum lease payments for the Company's operating leases as of December 31, 2011 are as follows (in thousands):


Year Ending
2012	$	2,487
2013		949

Total future non-cancelable minimum lease payments	$	3,436

Litigation

From time to time, the Company may be a party to various litigation claims in the normal course of business. Legal fees and other costs associated with such actions are expensed as incurred. The Company assesses, in conjunction with its legal counsel, the need to record a liability for litigation or contingencies. A liability is recorded when and if it is determined that such a liability for litigation or contingencies is both probable and reasonably estimable. No liability for litigation or contingencies had been recorded for the years ended December 31, 2011, 2010 and 2009.

Other Commitments

On September 10, 2010, the Company entered into certain agreements with a special-purpose entity formed for the sole purpose of acquiring specific patent assets that had been made available for sale by a third party. If the entity was successful in acquiring the patent assets, the Company had agreed to make a $5.0 million investment in the equity securities of the entity and serve as the exclusive licensing agent for the entity. As of December 31, 2011, the third party had completed the sale of the assets and the special-purpose entity was not the buyer. Therefore, no investment in such entity had been made and the Company has no further obligations under these agreements.

In December 2008, in connection with the acquisition of certain patent assets from an unaffiliated third party in an arm's-length transaction, the Company agreed to make a one-time payment of $5.0 million in the event that the Company earns $170.0 million of annual subscription revenues in any calendar year. No provision had been made for this contingent payment as of September 30, 2011. In October 2011, the underlying agreement with the unaffiliated third party was amended in exchange for a fixed payment of $4.0 million. Such payment was made in October 2011 and the contingent payment noted above and any related obligations were eliminated.

Guarantees and Indemnifications

The Company has, in connection with the sale of patent assets, agreed to indemnify and hold harmless the buyer of such patent assets for losses resulting from breaches of representations and warranties made by the Company. The terms of these indemnification agreements are generally perpetual. The maximum amount of potential future indemnification is unlimited. To date, the Company has not paid any amount to settle claims or defend lawsuits. The Company is unable to reasonably estimate the maximum amount that could be payable under these arrangements since these obligations are not capped but are conditional to the unique facts and circumstances involved. Accordingly, the Company had no liabilities recorded for these agreements as of December 31, 2011 or 2010. The Company has no reason to believe that there is any material liability related to such indemnification provisions. The Company does not indemnify its clients for patent infringement.

The Company also, in accordance with its Amended and Restated Bylaws, indemnifies certain officers and employees for certain events or occurrences, subject to certain limits, while the officer or employee is or was serving at its request in such capacity. The term of the indemnification period is indefinite. The maximum amount of potential future indemnification is unspecified. The Company has no reason to believe that there is any material liability for actions, events or occurrences that have occurred to date.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 14

-Paragraph 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.25)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Common Stock	12 Months Ended
Common Stock	Dec. 31, 2011
Common Stock [Abstract]
Common Stock	13. Common Stock In September 2011, the Company completed a follow-on offering in which it sold and issued 1,400,000 shares of common stock. The shares were sold by the underwriters at a price of $20.49 per share and the Company received proceeds of $27.4 million after deducting underwriting discounts and commissions. The Company incurred offering costs of $0.5 million. In May 2011, the Company completed its IPO in which the Company sold and issued 9,065,000 shares of common stock, including 634,565 shares issued pursuant to an option to purchase additional shares granted to the underwriters. The shares were sold by the underwriter at a price of $19.00 per share and the Company received proceeds of $160.2 million after deduction of underwriting discounts and commissions. The Company incurred offering costs of $2.9 million. Upon the closing of the IPO, all shares of redeemable convertible preferred stock outstanding automatically converted into 26,229,722 shares of common stock. In connection with the IPO, the Company increased the number of shares of common stock authorized for issuance from 60,000,000 shares to 200,000,000 shares. In November 2010, the Company issued 488,433 shares of Series C redeemable convertible preferred stock at a price of $7.78 per share. In connection with the issuance of the Series C redeemable convertible preferred stock, the Company increased the number of shares of common stock authorized for issuance from 45,000,000 shares to 60,000,000 shares. This transaction resulted in proceeds of $3.8 million, which the Company used to buy back 488,433 shares of common stock from certain employees at $7.78 per share. These shares were retired in January 2011. In connection with the issuance of the Series B redeemable convertible preferred stock in July 2009, the Company increased the number of shares of common stock authorized for issuance from 30,000,000 shares to 45,000,000 shares. In connection with the issuance of the Series A redeemable convertible preferred stock in August 2008, the Company entered into a common stock repurchase agreement with its founders. The Company issued 9,999,998 shares of common stock to the Company's founders in exchange for the assignment of intellectual property to the Company. The Company has the right to repurchase these shares of common stock upon the termination of a founder's service to the Company. The repurchase rights lapse over a four-year period, 25% on the first anniversary from the issuance date and thereafter ratably each month over the ensuing 36-month period. As of December 31, 2011, 2010 and 2009, 1,666,666, 4,166,666 and 6,666,667 of these shares were subject to repurchase, respectively. The value of common stock exchanged for the intellectual property was estimated to be $1.5 million based on the then-applicable common stock value of $0.145 per share. The assets received are recorded as intangible assets in the consolidated balance sheets and are being amortized over a four-year period. In connection with the acquisition of certain patent assets in September and October 2008, the Company issued 999,916 shares of common stock as consideration. The value of common stock given for the patent assets was estimated to be $250,000 based on the then-applicable common stock value of $0.25 per share. The $250,000 was capitalized as part of the cost to acquire the patent assets.

Preferred Stock

12 Months Ended

Dec. 31, 2011

Preferred Stock [Abstract]

Preferred Stock

14. Preferred Stock

Upon completion of its IPO, the Company authorized 10,000,000 shares of undesignated preferred stock.

No preferred stock shares were outstanding as of December 31, 2011. Redeemable convertible preferred stock consisted of the following at December 31, 2010 (in thousands):


Authorized
Series A (par value $0.0001)		6,979
Series A-1 (par value $0.0001)		7,016
Series B (par value $0.0001)		11,746
Series C (par value $0.0001)		489

Total redeemable convertible preferred stock		26,230

Issued and outstanding
Series A		6,979
Series A-1		7,016
Series B		11,746
Series C		489

Total redeemable convertible preferred stock		26,230

Carrying value
Series A	$	10,067
Series A-1		15,126
Series B		33,819
Series C		3,781

Total redeemable convertible preferred stock	$	62,793

Liquidation value
Series A	$	10,120
Series A-1		15,180
Series B		35,260
Series C		3,801

Total redeemable convertible preferred stock	$	64,361

Voting

The holders of Series A, Series A-1, Series B and Series C stock had one vote for each share of common stock into which their shares may be converted.

As long as any shares of preferred stock were outstanding, the holders of such shares of preferred stock were entitled to elect three directors at any election of directors. As long as each of John Amster, Geoffrey Barker and Eran Zur (together, the "Founders") continued to provide services to the Company as an employee or consultant, the holders of any outstanding shares of common stock held by Founders were entitled to elect three directors at any election of directors. For each Founder who ceases to provide services to the Company as an employee or consultant, the number of directors the Founders were entitled to elect would be reduced by one, but would never be reduced below one. The holders of preferred stock and common stock (voting together as a single class and not as separate series, and on an as-converted basis) would be entitled to elect one director at any election of directors.

As long as any shares of preferred stock remained outstanding, the Company must obtain approval from 55% of the holders of preferred stock in order to alter the certificate of incorporation, alter the rights, preferences, or privileges of the preferred stock, change the authorized number of shares of preferred stock or common stock, repurchase any shares of preferred stock or common stock other than shares subject to the right of repurchase by the Company, change the authorized number of directors, authorize a dividend for any class or series of stock, authorize or issue any equity security with rights superior to or on par with any series of preferred stock, incur any indebtedness other than in the ordinary course of business in excess of $750,000 individually or $1,500,000 in the aggregate in any 12-month period or consummate a liquidation event.

Dividends

Holders of Series B and Series C redeemable convertible preferred stock were entitled to receive non-cumulative dividends at the per annum rate of 8% of the applicable original issue price of $3.0019 or $7.78 per share, respectively, when and if declared by the board of directors, prior and in preference to any payment of any dividend on the Series A, Series A-1 or common stock. After payment of any such dividend, holders of Series A and Series A-1 stock were entitled to receive non-cumulative dividends at the per annum rate of 8% of the applicable original issue price of $1.45 or $2.1636 per share, respectively, when and if declared by the board of directors, prior and in preference to any payment of any dividend on the common stock. After payment of any such dividends, any additional dividends or distributions would be distributed among holders of common stock and preferred stock in proportion to the number of shares of common stock that would be held by each such holder as if the preferred stock were converted into shares of common stock. No dividends on shares of convertible preferred stock or common stock have been declared by the board from inception through December 31, 2011.

Liquidation

In the event of any liquidation, dissolution or winding up of the Company, either voluntary or involuntary, the holders of the then-outstanding Series B and Series C stock were entitled to receive, in preference to the holders of the Series A and Series A-1 and common stock, the amount per share equal to the respective purchase price of $3.0019 per share and $7.78 per share, plus declared and unpaid dividends. Upon completion of the distribution required to the Series B and Series C stockholders, the holders of Series A stock and Series A-1 stock were entitled to receive, in preference to the holders of the common stock, the amount per share equal to the respective purchase price of $1.45 per share and $2.1636 per share, plus declared and unpaid dividends. Thereafter, the remaining assets of the Company would be distributed ratably to the holders of the common stock. For purposes of determining the amount each holder of shares of Series A stock, Series A-1 stock, Series B stock and Series C stock was entitled to receive in such event of liquidation, each holder of shares of preferred stock shall be deemed to have converted (regardless of whether the holder actually converted) such holder's shares into common stock immediately prior to liquidation if, as a result of an actual conversion, such holder would receive, in the aggregate, an amount greater than the amount that would be distributed to such holder if such holder did not convert such series of preferred stock into shares of common stock. These liquidation features cause the Company's convertible preferred stock to be classified as mezzanine capital rather than as a component of stockholders' equity.

If, in the event of liquidation, the assets and funds distributed among the holders of the preferred stock are insufficient to permit the payment to such holders of the full preferential amount, then the entire assets and funds of the Company legally available for distribution were to be distributed ratably among the holders of the preferred stock in proportion to the preferential amount each such holder is otherwise entitled to receive.

Conversion

Each share of Series A, Series A-1, Series B and Series C stock was convertible into such number of shares of common stock as is determined by dividing the applicable original issue price for such series by the applicable conversion price for such series. The conversion price was $1.45, $2.1636, $3.0019 and $7.78 per share for Series A, Series A-1, Series B and Series C stock, respectively. Conversion was either at the option of the holder or was automatic upon the earlier of (a) the closing date of a public offering of the Company's common stock for which the public offering price is at least three times the original issue price for the Series B stock and the aggregate net proceeds to the Company are not less than $30.0 million or (b) upon the written consent of, in the case of the Series A and Series A-1 stock, the holders of at least 55% of the outstanding Series A and Series A-1 stock, and in the case of the Series B and Series C stock, the holders of at least a majority of the outstanding Series B and Series C stock. As of December 31, 2010 and 2009, the conversion ratio for Series A, Series A-1, Series B and Series C was 1-to-1. All preferred stock converted to common stock upon the Company's IPO in 2011.

Equity Award Plans And Stock-Based Compensation

12 Months Ended

Dec. 31, 2011

Equity Award Plans And Stock-Based Compensation[Abstract]

Equity Award Plans And Stock-Based Compensation

15. Equity Award Plans and Stock-Based Compensation

Equity Award Plans

In February 2011, the Company's board of directors adopted the 2011 Equity Incentive Plan (the "2011 Plan"), which became effective on the date of the Company's IPO. The 2011 Plan provides for the issuance of incentive stock options, non-qualified stock options, stock appreciation rights, restricted shares of the Company's common stock and stock units to employees, directors, and non-employees. The

board of directors reserved 1,500,000 shares of common stock for future issuance under the 2011 Plan. As of December 31, 2011, there were 1,004,352 shares available for grant under the 2011 Plan.

In August 2008, the Company's board of directors adopted the 2008 Plan (the "2008 Plan") which provides for the issuance of incentive stock options, non-qualified stock options, as well as the direct award or sale of shares of common stock to employees, directors, and non-employees for up to 9,019,474 shares of common stock, as amended. No further awards will be made under the 2008 Plan; however, all awards outstanding under the 2008 Plan will continue to be governed by the existing terms. As of December 31, 2010 and 2009, there were 2,131,308 and 601,917 shares of common stock reserved for future issuance, respectively, under the 2008 Plan. No common stock was reserved for issuance under the 2008 Plan as of December 31, 2011.

Under both the 2011 Plan and 2008 Plan, incentive stock options and non-qualified stock options are to be granted at a price that is not less than 100% of the fair value of the stock at the date of grant. Stock options granted to newly hired employees vest 25% on the first anniversary of the date of hire and ratably each month over the ensuing 36-month period. Stock options granted to existing employees generally vest ratably over the 48-months following the date of grant. Stock options are exercisable for a maximum period of 10 years after date of grant. Incentive stock options granted to stockholders who own more than 10% of the outstanding stock of the Company at the time of grant must be issued at an exercise price not to be less than 110% of the fair value of the stock on the date of grant.

Stock Options

The total stock options outstanding, vested and expected to vest, and exercisable are summarized as follows:


	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life		Aggregate Intrinsic Value
						(in years)		(in thousands)
Outstanding at December 31, 2010		6,455,646			2.83
Granted		2,525,399			13.71
Exercised		(1,384,778	)		1.08
Forfeited		(93,542	)		2.49

Outstanding at December 31, 2011		7,502,725			6.82		8.6	$	50,556

Vested and expected to vest at December 31, 2011		6,577,712			6.58		8.5	$	45,915
Exercisable at December 31, 2011		1,833,953			3.07		7.9	$	18,297

The aggregate intrinsic value in the table above represents the total pretax intrinsic value (the difference between the market value of the Company's common stock as of December 31, 2011 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options. The intrinsic value of options exercised during the period ended December 31, 2011, 2010 and 2009 was $19.0 million, $637,000, and $0, respectively.

Early Exercises. Stock options granted under the 2008 Plan allow the board of directors to grant awards to provide employee option holders the right to elect to exercise unvested options in exchange for restricted common stock. Unvested shares, which amounted to 192,178, 130,851, and 152,113 at December 31, 2011, 2010 and 2009, respectively, were subject to a repurchase right held by the Company at the original issue price in the event the optionees' employment was terminated either voluntarily or involuntarily. For exercises of employee options, this right lapses according to the vesting schedule designated on the associated option grant. The repurchase terms are considered to be a forfeiture provision. In accordance with ASC 718, the shares purchased by the employees pursuant to the early exercise of stock options are not deemed to be outstanding stock options. In addition, cash received from employee exercises of unvested options is treated as a refundable deposit shown as a liability in the accompanying consolidated balance sheets. As of December 31, 2011, 2010 and 2009, cash received related to unvested shares totaled approximately $118,000, $63,000, and $38,000, respectively. Amounts recorded are transferred into common stock and additional paid-in-capital as the shares vest.

Restricted Stock Units

RSUs granted to newly hired employees vest 25% on the first anniversary of the date of hire and ratably each quarter over the ensuing 36-month period. RSUs granted to existing employees generally vest quarterly over the 48-months following the date of grant. The summary of RSU activity is as follows:


	Number of Units			Weighted- Average Grant Date Fair Value
Unvested at December 31, 2010		—		$	—
Granted		185,099			25.20
Vested		(6,168	)		26.66
Forfeited		—			—

Unvested at December 31, 2011		178,931		$	25.15

Stock-Based Compensation Related to Employees and Directors

Valuation Method. The fair value of stock options is calculated using the Black-Scholes option-pricing model, taking into account the relevant terms and conditions of the option contract. Option valuation models, including the Black-Scholes option pricing model, require the input of assumptions. Changes in the input assumptions can materially affect the fair value.

Fair Value of Common Stock. The fair value of the Company's common stock has historically been determined by the board of directors as there was no public market for the common stock, subsequent to the IPO the Company used the traded stock price. Determining the fair value of the Company's common stock required complex and subjective judgment and estimates. There is inherent uncertainty in making these judgments and estimates. The Company performed its analysis in accordance with applicable elements of the practice aid issued by the American Institute of Certified Public Accountants entitled Valuation of Privately Held Company Equity Securities Issued as Compensation.

The Company performed regular contemporaneous valuations to assist the Company's board of directors in estimating the fair value of the common stock at each meeting of which options were granted. The procedures performed to determine the fair value of the Company's common stock were based on a combination of factors including: the Company's valuation in the last sale of preferred stock, the operating and financial performance of the Company, the hiring of key personnel, patent and customer acquisitions, the lack of liquidity of the shares of common stock, the liquidation preference of the shares of preferred stock as well as subjective factors relating to the Company's business. The aforementioned factors were used to estimate the aggregate equity value of the Company at specific stock option grant dates.

After estimating the Company's equity value, the Company then utilized the option pricing method. Under this method, the value of the common stock was estimated based upon an analysis of values for the Company assuming various outcomes, such as: an initial public offering; a merger or sale; a liquidation; and remaining private, along with the estimated probability of each outcome assuming that all preferred stock is converted into common stock.

Expected Term. The expected term represents the period over which options are expected to be outstanding. As the Company does not have sufficient historical experience for determining the expected term, the Company derived the expected term using the simplified method available under U.S. generally accepted accounting principles.

Expected Volatility. Expected volatility is based on an analysis of reported data for a group of peer companies that granted stock options with substantially similar terms. The expected volatility of stock options granted was determined using an average of the historical volatility measures of this peer group of companies for a period equal to the expected life of the stock option. The Company re-evaluates the appropriateness of peer companies used for this purpose for every stock option grant. The Company intends to apply this process consistently using the same or similar entities until a sufficient amount of historical information regarding the volatility of its own share price becomes available or the identified entities cease to be comparable to the Company. In the latter case, more suitable entities whose share prices are publicly available would be utilized in the calculation.

Risk-free Interest Rate. The risk-free interest rate was based on a zero-coupon treasury instrument with a term consistent with the expected term of the stock options.

Expected Dividends. The expected dividend assumption is based on the Company's current expectation about its future dividend policy.

The weighted-average assumptions and resulting fair values were as follows:


	Years Ended December 31,
	2011			2010			2009
Risk-free interest rate		1.44	%		2.00	%		2.46	%
Expected volatility		59	%		59	%		122	%
Expected dividend yield		—			—			—
Expected term		6.4 years			6.2 years			6 years
Weighted-average estimated fair value	$	7.81		$	3.06		$	0.69

For RSUs, stock-based compensation expense was calculated based on the Company's stock price on the date of grant, multiplied by the number of units granted. The grant date fair value of RSUs, less estimated forfeitures, is recognized on a straight-line basis over the requisite service period.

Stock compensation expense related to employees and directors stock options was $5.5 million, $1.0 million and $172,000 during the years ended December 31, 2011, 2010 and 2009, respectively, and $406,000 stock compensation expense related to restricted stock units for the year ended December 31, 2011. Stock-based compensation of $110,000 was capitalized year ended December 31, 2011 as part of the cost of internal-use software. No stock-based compensation expense was capitalized during the years ended December 31, 2010 and 2009.

Compensation expense is recognized ratably over the requisite service period. At December 31, 2011, the total unrecognized compensation cost related to options was $24.1 million, which is expected to be recognized over a weighted average period of 3.5 years. At December 31, 2011, the total unrecognized compensation cost related to RSUs was $2.6 million, which is expected to be recognized over a weighted average period of 3.4 years.

Stock-Based Compensation Related to Non-Employees

The Company periodically grants options to non-employees in exchange for goods and services. For the year ended December 31, 2011, the Company issued 10,000 shares of common stock, 75,000 options to purchase common stock and restricted stock units of 62,632 to non-employees in exchange for services. No options were granted to non-employees in exchange for goods and services during the year ended December 31, 2010. During the year ended December 31, 2009, the Company issued to non-employees in exchange for services, options to purchase 80,398 shares of common stock.

Stock compensation expense related to non-employees was $1.1 million, $232,000, and $55,000 for the years ended December 31, 2011, 2010 and 2009, respectively. The Company accounts for non-employee stock options on a fair value basis using the Black-Scholes option pricing model. The fair value of non-employee options is recognized ratably over the requisite service period of the underlying award. Each reporting period, the fair value of the unvested non-employee options is revalued and amortized over the remaining requisite service period.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65, A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-6

-Paragraph 53

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 50

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

Income Taxes

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Income Taxes

16. Income Taxes

Income before income tax (provision) benefit consists of the following (in thousands):


	Year Ended December 31,
	2011		2010		2009
Domestic	$	45,256	$	23,973	$	413
International		101		82		8

Total income before income tax (provision) benefit	$	45,357	$	24,055	$	421

The components of the (provision for) benefit from income taxes are as follows (in thousands):


	Year Ended December 31,
	2011			2010			2009
Current
Federal	$	(5,603	)	$	—		$	—
State		(421	)		(268	)		(317	)
Foreign		(4,576	)		(2,859	)		(1,648	)

Total current		(10,600	)	$	(3,127	)	$	(1,965	)
Deferred
Federal	$	(6,555	)	$	(5,825	)	$	2,826
State		930			(1,232	)		652

Total deferred	$	(5,625	)	$	(7,057	)	$	3,478

Total (provision for) benefit from income taxes	$	(16,225	)	$	(10,184	)	$	1,513

Net deferred tax assets (liabilities) consist of the following (in thousands):


	Year Ended December 31,
	2011			2010
Current deferred tax assets:
Deferred revenue	$	3,183		$	1,034
Reserves and other		268			851
Stock-based compensation		1,606			137
Other tax credits		13			545
Net operating losses		122			—

Gross current deferred tax asset	$	5,192		$	2,567
Valuation allowance		—			—

Total current deferred tax assets	$	5,192		$	2,567

Non-current deferred tax assets (liabilities):
Depreciation and amortization	$	(14,695	)	$	(10,489	)
Foreign tax credits		—			3,909
Net operating losses		300			434

Total non-current net deferred tax liabilities	$	(14,395	)	$	(6,146	)

The following is a reconciliation of the statutory federal income tax to the Company's effective tax (in thousands):


	Year ended December 31,
	2011			2010
Tax at statutory federal rate	$	(15,875	)	$	(8,420	)
State tax – net of federal benefit		(176	)		(1,345	)
Permanent differences and other		(341	)		(398	)
Foreign tax		(4,576	)		(2,858	)
Foreign tax credit		4,555			2,837
Foreign income not taxed at Federal rate		36			—
EZ credit		152			—

Total provision for income taxes	$	(16,225	)	$	(10,184	)

In assessing the realization of deferred tax assets, management considers whether it is more-likely-than-not that some portion or all of deferred assets will not be realized. The ultimate realization of the deferred tax asset is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Based on the available objective evidence as of December 31, 2011 and 2010, management believes it is more-likely-than-not that the U.S. net deferred tax asset will be fully realized. Accordingly, management has not applied a valuation allowance against its net deferred tax assets.

As of December 31, 2011, the Company had state net operating loss carryforwards of $7.3 million available to reduce future taxable income, which will begin to expire in 2031. As of December 31, 2011, the Company had foreign tax credits of $1.7 million for federal purposes, all of which is associated with windfall tax benefits that will be recorded as additional paid-in capital when realized. The foreign tax credits will begin to expire in 2021.

Internal Revenue Code Section 382 places a limitation (the Section 382 Limitation) on the amount of taxable income that can be offset by net operating loss carryforwards after a change in control (generally greater than 50% change in ownership) of a loss corporation. California has similar rules. The Company's capitalization described herein may have resulted in such a change. Generally, after a change in control, a loss corporation cannot deduct operating loss carryforwards in excess of the Section 382 Limitation. Management has considered the impact of such limitation in determining the utilization of its operating loss carryforwards against taxable income in future periods.

Deferred tax liabilities have not been recognized for undistributed earnings for foreign subsidiaries because it is management's intention to permanently reinvest such undistributed earnings outside the U. S. Generally, such earnings are subject to potential foreign withholding tax and the U.S. tax upon remittance of dividends and under certain other circumstances. Determination of the amount of recognized deferred tax liability for temporary differences related to investments in these non-U.S. subsidiaries are considered immaterial.

Uncertain Tax Positions

On January 1, 2009, the Company adopted authoritative accounting guidance that clarifies the accounting for uncertainty in income taxes recognized in an enterprise's financial statements and prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of an uncertain tax position taken or expected to be taken in a tax return. Under the guidance, the Company is required to recognize in the consolidated financial statements the impact of a tax position, if that position is more-likely-than-not of being sustained on audit, based on the technical merits of the position. A tax position that meets the more-likely-than-not threshold is measured as the largest amount of tax benefit that is greater than 50 percent likely of being realized on ultimate settlement with a taxing authority that has full knowledge of all relevant information. The guidance also prescribes rules for: derecognition, classification, interest and penalties, accounting in interim periods and disclosure. There was no adjustment to the opening balance of retained earnings for the cumulative effect of adopting this guidance as a change in accounting principle. The adoption did not impact the Company's consolidated financial condition, results of operations, or cash flows.

As of December 31, 2011, the Company's total amount of unrecognized tax benefits was $0.4 million, all of which would impact the Company's effective tax rate, if recognized.

The following table summarizes the activity related to the Company's unrecognized tax benefits (in thousands):


Balance as of January 1, 2011	$	—
Gross increase related to current period tax positions		369

Balance as of December 31,	$	369

The Company does not believe it is reasonably possible that its unrecognized tax benefits will significantly change within the next twelve months.

The Company's policy is to recognize interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense and as of December 31, 2011, there were no accrued interest and penalties related to uncertain tax positions.

The Internal Revenue Service is currently examining the Company's employment taxes for the 2010 and 2009 tax years and federal income tax returns for the 2009 and 2008 tax years. During the fourth quarter of 2011 the IRS issued a Notice of Proposed Adjustments ("NOPA") for the 2008 and 2009 tax years with proposed adjustments and no assessment. The Company has agreed to the adjustments which are pending final approval from the IRS. The proposed adjustments will not have a material impact on the Company's consolidated financial statements. The IRS examination is expected to conclude in 2012. The Company's 2009 and 2008 tax years are currently under examination by State of California Franchise Tax Board. The Company does not expect a material impact on its consolidated financial statements as a result of this examination. The tax periods open to examination by the federal and most state tax authorities includes 2008 through 2011. For the Company's foreign jurisdictions, the 2009 through 2011 tax years remain open to examination by their respective tax authorities.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 136, 172

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 43, 44, 45, 46, 47, 48, 49

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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+ Details

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2011
Related Party Transactions [Abstract]
Related Party Transactions	17. Related Party Transactions During the year ended December 31, 2011, one member of the Company's board of directors also served on the board of directors of one of RPX's clients. For the year ended December 31, 2011, the Company recognized subscription fee revenue of $2.6 million related to this client. During the years ended December 31, 2010 and 2009, two members of the Company's board of directors served on the boards of directors of RPX's clients. For the years ended December 31, 2010 and 2009, the Company recognized subscription fee revenue of $2.7 million and $505,000, respectively, related to these clients. In March 2009, the Company additionally sold certain patent assets to one of these clients for a total cash consideration of $1.5 million. As of December 31, 2011 and 2010, there were no receivables due from either of these clients. In April 2011, the Company sold an aggregate of 105,708 shares of its common stock at a price of $14.19 per share to two members of its board of directors.

- Definition

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph k

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 3A

-Section 04

-Paragraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 1-4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 4

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

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-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 6

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-Topic 850

-SubTopic 10

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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864

+ Details

Segments

12 Months Ended

Dec. 31, 2011

Segments [Abstract]

Segments

18. Segments

Operating segments are reported in a manner consistent with the internal reporting provided to, and defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or decision making group, in deciding how to allocate resources and in assessing performance. The Company's chief operating decision maker is its chief executive officer. The Company's chief executive officer reviews financial information presented on a consolidated basis and, as a result, the Company concluded that there is only one reportable segment.

The Company markets its solution to companies around the world. Revenues are generally attributed to geographic areas based on the country in which the customer is domiciled.

Revenue information by location is presented below (in thousands):


	Years Ended December 31,
	2011		2010		2009
United States	$	93,145	$	53,040	$	13,992
Europe		12,079		10,084		2,854
Asia		48,820		31,750		15,976

Total	$	154,044	$	94,874	$	32,822

The following table presents revenue generated by country as a percentage of net revenue for the countries which represent 10% or more of net revenues for the periods presented below:


	Years Ended December 31,
	2011			2010			2009
United States		60	%		56	%		43	%
Japan		17	%		18	%		26	%
Korea		5	%		8	%		22	%

No other country represented 10% or more of revenues from the above periods.

Long-lived assets information by location is presented below (in thousands):


	December 31,
	2011		2010
United States	$	169,132	$	127,640
Japan		49		74

Total	$	169,171	$	127,714

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2011
Subsequent Events [Abstract]
Subsequent Events	19. Subsequent Events In March 2012, the Company entered into an amended lease agreement to increase its San Francisco, California office space to approximately 67,000 total square feet from May 2013 through October 2019. The monthly base rent payments pursuant to this lease will initially be approximately $330,000 per month, increasing to approximately $364,000 per month. Total future non-cancelable minimum lease payments will be $26.1 million. In March 2012, a complaint was filed against the Company and some of its clients (collectively the "Defendants"). The complaint alleges that the Defendants violated federal antitrust law, California antitrust law and California unfair competition law. The complaint claims that after the Company terminated its negotiations with the plaintiff to license certain patents held by the plaintiff, the Defendants violated the law by jointly refusing to negotiate or accept licenses under the plaintiff's patents. The plaintiff seeks unspecified monetary damages and injunctive relief. Because the case is at a very early stage, the Company is not currently able to determine whether there is a reasonable possibility that a loss has been incurred nor can it estimate the range of the potential loss that may result from this litigation.

Selected Quarterly Financial Information

12 Months Ended

Dec. 31, 2011

Selected Quarterly Financial Information[Abstract]

Selected Quarterly Financial Information

20. Selected Quarterly Financial Information (Unaudited)

Summarized quarterly financial information for the years ended December 31, 2011 and 2010 is as follows (in thousands):


	Three months ended
	March 31, 2011			June 30, 2011			September 30, 2011			December 31, 2011
Revenue	$	34,390		$	38,850		$	38,394		$	42,410
Cost of revenue		13,665			14,528			16,459			22,719
Selling, general and administrative expenses		8,110			11,286			9,069			12,128

Operating income		12,615			13,036			12,866			7,563
Interest income		26			42			68			61
Interest expense		(399	)		(235	)		(147	)		(144	)
Other income, net		—			—			—			5

Income before provision for income taxes		12,242			12,843			12,787			7,485
Provision for income taxes		5,547			5,177			4,935			566

Net income	$	6,695		$	7,666		$	7,852		$	6,919

Net income available to common stockholders:
Basic	$	1,046		$	4,714		$	7,381		$	6,615

Diluted	$	1,249		$	4,924		$	7,421		$	6,633

Net income available to common stockholders:
Basic	$	0.14		$	0.16		$	0.17		$	0.14

Diluted	$	0.14		$	0.15		$	0.15		$	0.13

Other Data:
Deferred revenue, including current portion		92,763			87,574			97,535			108,275
Stock-based compensation expense		1,048			1,888			1,913			2,147


	Three months ended
	March 31, 2010			June 30, 2010			September 30, 2010			December 31, 2010
Revenue	$	18,212		$	21,835		$	25,131		$	29,696
Cost of revenue		7,733			10,216			12,401			13,252
Selling, general and administrative expenses		4,268			5,191			5,891			8,567
Loss on sale of patent assets, net		—			—			75			461

Operating income		6,211			6,428			6,764			7,416
Interest income		131			67			53			24
Interest expense		(971	)		(781	)		(698	)		(601	)
Other income, net		—			—			—			12

Income before provision for income taxes		5,371			5,714			6,119			6,851
Provision for income taxes		2,251			2,393			2,553			2,987

Net income	$	3,120		$	3,321		$	3,566		$	3,864

Net income available to common stockholders:
Basic	$	249		$	313		$	389		$	457

Diluted	$	285		$	385		$	489		$	543

Net income available to common stockholders:
Basic	$	0.05		$	0.06		$	0.06		$	0.07

Diluted	$	0.05		$	0.05		$	0.06		$	0.07

Other Data:
Deferred revenue, including current portion		62,226			67,399			77,471			82,440
Stock-based compensation expense		157			192			282			615

- Definition

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

+ References+ Details