RPX (RPXC) 10-Q 4 Aug 15 2015 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Entity Trading Symbol	RPXC
Entity Registrant Name	RPX Corporation
Entity Central Index Key	1,509,432
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		54,806,951

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 101,872	$ 78,019
Short-term investments	279,282	239,514
Restricted cash	679	584
Accounts receivable	11,590	24,793
Prepaid expenses and other current assets	11,947	3,466
Deferred tax assets	4,459	4,400
Total current assets	409,829	350,776
Patent assets, net	242,198	236,349
Property and equipment, net	4,417	4,151
Intangible assets, net	2,663	3,526
Goodwill	19,978	19,978
Restricted cash, less current portion	727	1,091
Deferred tax assets, less current portion	0	93
Other assets	6,359	26,100
Total assets	686,171	642,064
Current liabilities:
Accounts payable	653	235
Accrued liabilities	9,115	14,257
Deferred revenue	137,849	133,316
Deferred payment obligations	8,650	0
Other current liabilities	502	640
Total current liabilities	156,769	148,448
Deferred revenue, less current portion	4,774	2,893
Deferred tax liabilities	44	0
Other liabilities	5,783	5,678
Total liabilities	$ 167,370	$ 157,019
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock	$ 5	$ 5
Additional paid-in capital	337,647	326,280
Retained earnings	181,389	158,868
Accumulated other comprehensive loss	(240)	(108)
Total stockholders’ equity	518,801	485,045
Total liabilities and stockholders’ equity	$ 686,171	$ 642,064

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenue	$ 67,551	$ 64,293	$ 150,838	$ 126,181
Cost of revenue	36,985	31,542	71,744	60,462
Selling, general and administrative expenses	18,997	18,579	38,456	35,834
Gain on sale of patent assets, net	(592)	(699)	(592)	(699)
Operating income	12,161	14,871	41,230	30,584
Other income, net	934	94	1,055	193
Income before provision for income taxes	13,095	14,965	42,285	30,777
Provision for income taxes	5,065	5,566	16,224	11,518
Net income	$ 8,030	$ 9,399	$ 26,061	$ 19,259
Net income per share:
Basic (dollars per common share)	$ 0.15	$ 0.18	$ 0.48	$ 0.36
Diluted (dollars per common share)	$ 0.14	$ 0.17	$ 0.47	$ 0.35
Weighted-average shares used in computing net income per share:
Basic (in shares)	54,490	53,203	54,334	53,004
Diluted (in shares)	55,687	54,776	55,457	54,622

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 8,030	$ 9,399	$ 26,061	$ 19,259
Other comprehensive income, net of tax:
Unrealized holding losses on available-for-sale securities arising during the period, net of tax	(216)	(1)	(132)	(19)
Comprehensive income	$ 7,814	$ 9,398	$ 25,929	$ 19,240

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 26,061	$ 19,259
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	69,991	59,289
Stock-based compensation	8,525	8,868
Excess tax benefit from stock-based compensation	(1,195)	(2,006)
Gain on sale of patent assets, net	(592)	(699)
Amortization of premium on investments	3,181	3,380
Deferred taxes	(186)	(978)
Fair value adjustment on deferred payment obligations	(705)	0
Other	0	(500)
Changes in assets and liabilities, net of business acquired:
Accounts receivable	13,203	26,414
Prepaid expenses and other assets	(12,097)	(5,274)
Accounts payable	418	11
Accrued and other liabilities	(4,850)	(823)
Deferred revenue	6,314	(6,636)
Net cash provided by operating activities	108,068	100,305
Investing activities
Purchases of investments	(137,663)	(106,618)
Maturities of investments	100,548	98,920
Business acquisition, net of cash acquired	(425)	(2,169)
Decrease in restricted cash	269	144
Purchases of property and equipment	(1,134)	(790)
Acquisitions of patent assets	(48,936)	(73,948)
Proceeds from sale of patent assets	650	860
Acquisition of other assets	(2,500)	0
Net cash used in investing activities	(89,191)	(83,601)
Financing activities
Proceeds from sale of patent assets	(935)	0
Proceeds from deferred payment obligations	6,270	0
Proceeds from exercise of stock options and other common stock issuances	4,294	2,399
Taxes paid related to net-share settlements of restricted stock units	(2,307)	(2,675)
Excess tax benefit from stock-based compensation	1,195	2,006
Repurchase of common stock	(3,541)	0
Net cash provided by financing activities	4,976	1,730
Net increase in cash and cash equivalents	23,853	18,434
Cash and cash equivalents at beginning of period	78,019
Cash and cash equivalents at end of period	101,872	118,589
Non-cash investing and financing activities
Change in patent assets purchased and accrued but not paid	200	(500)
Change in fixed assets purchased and accrued but not paid	0	(166)
Change in other assets purchased and accrued but not paid	0	(63)
Unpaid cash consideration for business acquisition	0	542
Nonmonetary exchange for investments	$ 5,935	$ 0

Nature of Business

Nature of Business	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature Of Business	Nature of Business RPX Corporation (also referred to herein as “RPX” or the “Company”) helps companies reduce patent-related risk and expense by providing 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 that are being or may be asserted against the Company’s current or prospective clients. The Company may occasionally enter into agreements to acquire covenants not to sue in order to further mitigate its clients’ litigation risk. The acquired patents, licenses to patents, patent rights and agreements for covenants not to sue are collectively referred to as “patent assets.” 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 and access to its proprietary patent market intelligence and data. In addition to the Company’s core solution, in August 2012, the Company began underwriting patent infringement liability insurance policies to insure against certain costs of litigation from non-practicing entities (“NPEs”). In March 2014, the Company formed a reinsurance company to assume some portion of the underwriting risk on insurance policies that the Company issues on behalf of a Lloyd’s of London underwriting syndicate. The Company began placing new policies under the reinsurance model in May 2014. As of, and for the six months ended June 30, 2015 , the effect of the insurance policies that the Company has issued or assumed through our reinsurance business was not material to the Company’s results of operations, financial condition or cash flows.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Standards In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which will supersede most existing revenue recognition guidance in U.S. generally accepted accounting principles (“U.S. GAAP”) once it becomes effective. ASU 2014-09 requires an entity to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 will be effective for annual and interim periods beginning after December 15, 2017 and early adoption is permitted for annual and interim periods beginning after December 31, 2016. The Company is currently evaluating the impact of the adoption of ASU 2014-09 on its consolidated financial statements.
Basis Of Presentation And Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Basis of Presentation The accompanying condensed consolidated balance sheet as of June 30, 2015 , the condensed consolidated statements of operations, the condensed consolidated statements of comprehensive income and the condensed consolidated statements of cash flows for the six months ended June 30, 2015 and 2014 , are unaudited. The condensed consolidated balance sheet as of December 31, 2014 was derived from the audited consolidated financial statements which are included in the Company’s Form 10-K for the fiscal year ended December 31, 2014 , which was filed with the U.S. Securities and Exchange Commission (“SEC”) on March 2, 2015. The unaudited condensed consolidated financial statements should be read in conjunction with the audited financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 . The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America and with the instructions for Form 10-Q and Regulation S-X for interim financial statements. Accordingly, they do not include all of the information and notes required for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring items, necessary to state fairly the results of the interim periods have been included in the accompanying financial statements. Operating results for the six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for any subsequent interim period or for the year ending December 31, 2015. Recently Adopted Accounting Standards In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which will supersede most existing revenue recognition guidance in U.S. generally accepted accounting principles (“U.S. GAAP”) once it becomes effective. ASU 2014-09 requires an entity to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 will be effective for annual and interim periods beginning after December 15, 2017 and early adoption is permitted for annual and interim periods beginning after December 31, 2016. The Company is currently evaluating the impact of the adoption of ASU 2014-09 on its consolidated financial statements. Significant Accounting Policies There have been no material changes to the Company’s significant accounting policies during the six months ended June 30, 2015 , as compared to the significant accounting policies presented under the heading “Basis of Presentation and Significant Accounting Policies” in Note 2 of the Notes to Consolidated Financial Statements in Part II, Item 8 of the Company’s Annual Report on Form 10-K filed with the SEC on March 2, 2015.
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The accompanying condensed consolidated balance sheet as of June 30, 2015 , the condensed consolidated statements of operations, the condensed consolidated statements of comprehensive income and the condensed consolidated statements of cash flows for the six months ended June 30, 2015 and 2014 , are unaudited. The condensed consolidated balance sheet as of December 31, 2014 was derived from the audited consolidated financial statements which are included in the Company’s Form 10-K for the fiscal year ended December 31, 2014 , which was filed with the U.S. Securities and Exchange Commission (“SEC”) on March 2, 2015. The unaudited condensed consolidated financial statements should be read in conjunction with the audited financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 . The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America and with the instructions for Form 10-Q and Regulation S-X for interim financial statements. Accordingly, they do not include all of the information and notes required for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring items, necessary to state fairly the results of the interim periods have been included in the accompanying financial statements. Operating results for the six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for any subsequent interim period or for the year ending December 31, 2015.

Net Income Available to Common

Net Income Available to Common Stockholders	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Net Income Available to Common Stockholders	Net Income Per Share Basic and diluted net income per share are computed by dividing the net income by the weighted-average number of shares of common stock outstanding during the period. Diluted net income per share 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 and restricted stock units using the treasury stock method. The following table presents the calculation of basic and diluted net income per share (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Numerator: Net income $ 8,030 $ 9,399 $ 26,061 $ 19,259 Denominator: Basic shares: Weighted-average shares used in computing basic net income per share 54,490 53,203 54,334 53,004 Diluted shares: Weighted-average shares used in computing basic net income per share 54,490 53,203 54,334 53,004 Dilutive effect of stock options and restricted stock units using the treasury-stock method 1,197 1,573 1,123 1,618 Weighted-average shares used in computing diluted net income per share 55,687 54,776 55,457 54,622 Net income per share: Basic $ 0.15 $ 0.18 $ 0.48 $ 0.36 Diluted $ 0.14 $ 0.17 $ 0.47 $ 0.35 The following securities were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Weighted-average: Stock options outstanding 530 757 694 762 Restricted stock units outstanding 139 46 190 37

Financial Instruments

Financial Instruments	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Financial Instruments The following tables present the Company's financial assets and liabilities measured at fair value on a recurring basis (in thousands): June 30, 2015 Amortized Cost Unrealized Estimated Fair Value Level 1 Level 2 Level 3 Gains Losses Assets: Cash equivalents: Commercial paper $ 14,798 $ — $ — $ 14,798 $ — $ 14,798 $ — Municipal bonds 1,978 — — 1,978 — 1,978 — Money market funds 7,504 — — 7,504 7,504 — — $ 24,280 $ — $ — $ 24,280 $ 7,504 $ 16,776 $ — Short-term investments: Municipal bonds $ 150,771 $ 15 $ (46 ) 150,740 $ — $ 150,740 $ — Commercial paper 7,295 — — 7,295 — 7,295 — Corporate bonds 65,142 3 (46 ) 65,099 — 65,099 — U.S. government and agency securities 47,064 20 (1 ) 47,083 — 47,083 — Equity securities 577 — (185 ) 392 392 — — $ 270,849 $ 38 $ (278 ) $ 270,609 $ 392 $ 270,217 $ — Liabilities: Current liabilities: Deferred payment obligations $ 4,355 $ 705 $ — $ 3,650 $ — $ — $ 3,650 $ 4,355 $ 705 $ — $ 3,650 $ — $ — $ 3,650 December 31, 2014 Amortized Cost Unrealized Estimated Fair Value Level 1 Level 2 Level 3 Gains Losses Assets: Cash equivalents: Commercial paper $ 5,749 $ — $ — $ 5,749 $ — $ 5,749 $ — U.S. government and agency securities 2,000 — — 2,000 — 2,000 — Municipal bonds 1,409 — — 1,409 — 1,409 — Money market funds 451 — — 451 451 — — $ 9,609 $ — $ — $ 9,609 $ 451 $ 9,158 $ — Short-term investments: Municipal bonds $ 120,270 $ 24 $ (12 ) $ 120,282 $ — $ 120,282 $ — Commercial paper $ 2,498 — — 2,498 — 2,498 — Corporate bonds $ 68,758 1 (87 ) 68,672 — 68,672 — U.S. government and agency securities $ 48,095 — (33 ) 48,062 — 48,062 — $ 239,621 $ 25 $ (132 ) $ 239,514 $ — $ 239,514 $ — The Company's financial assets are generally classified as available-for-sale. Available-for-sale securities are reported at fair value, with unrealized gains and losses, net of tax, included as a separate component of stockholders’ equity within accumulated other comprehensive loss. Realized gains and losses on these securities are included in other income, net in the Company’s condensed consolidated statements of operations and have not been material for all periods presented. As of June 30, 2015 and December 31, 2014 , approximately 79% and 76% , respectively, of our marketable securities investments mature within one year and 21% and 24% , respectively, mature within one to five years. As of June 30, 2015 , no individual securities incurred continuous unrealized losses for greater than 12 months . As of June 30, 2015 and December 31, 2014 , the Company had short-term cost method investments of $3.7 million and nil , respectively. As of June 30, 2015 and December 31, 2014 , the Company had short-term investments classified as held-to-maturity of $5.0 million and nil , respectively, which had no unrealized gains or losses since acquired. Cost method and held-to-maturity investments are recorded at amortized cost in short-term investments in the Company's condensed consolidated balance sheets. In connection with the Rockstar Transaction (see Note 9, "Commitments and Contingencies"), the Company received funding of $6.3 million from a syndicate participant. At June 30, 2015 , the fair value of the loan from the syndicate participant was $3.7 million and was categorized as Level 3. Level 3 Valuation Techniques Level 3 financial liabilities consist of repayment obligations to a third party for which determination of fair value requires significant judgment and estimation. Changes in fair value measurement categorized within Level 3 of the fair value hierarchy are analyzed each period for changes in estimates or assumptions and recorded as the Company deems appropriate. The Company uses the Black-Scholes option valuation model to value deferred payment obligations at inception and subsequent valuation dates. This model incorporates assumptions about details such as the value of underlying securities, expected terms, maturity, risk-free interest rates, as well as volatility. A significant change in volatility and expected term could result in a significant change in fair value. The risk-free interest rate was based on the implied yield currently available on U.S. Treasury zero coupon issues with an equivalent remaining term at the measurement date. The expected volatility was calculated using the standard deviation of the underlying security's weekly returns over the estimated period of time to take to settle the liability. The expected term of the liability is determined by the estimated settlement date of the liability. Changes in the fair value are recorded in the Company's condensed consolidated statements of operations. As of June 30, 2015 , there were no transfers in or out of Level 3 from other levels of the fair value hierarchy.

Patent Assets, Net

Patent Assets, Net	6 Months Ended
	Jun. 30, 2015
Patent Assets, Net [Abstract]
Patent Assets, Net	ent assets, net, consisted of the following (in thousands): December 31, Additions Disposals June 30, Patent assets $ 665,290 $ 74,136 $ (138 ) $ 739,288 Accumulated amortization (428,941 ) (68,202 ) 53 (497,090 ) Patent assets, net $ 236,349 $ 242,198 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 June 30, 2015 , the estimated economic useful lives of the Company’s patent assets generally ranged from 24 to 60 months . As of June 30, 2015 , the weighted-average estimated economic useful life at the time of acquisition of all patents acquired since the Company’s inception was 45 months . As of June 30, 2015 , the Company expects amortization expense in future periods to be as follows (in thousands): 2015 (remainder) $ 66,315 2016 104,029 2017 49,695 2018 14,852 2019 6,864 Thereafter 443 Total estimated future amortization expense $ 242,198 Amortization expense was $35.1 million and $30.1 million for the three months ended June 30, 2015 and 2014 , respectively, and $68.2 million and $57.7 million for the six months ended June 30, 2015 and 2014 , respectively. On December 22, 2014, the Company and RPX Clearinghouse LLC (a wholly-owned subsidiary of the Company) entered into an Asset Purchase Agreement by and among Rockstar Consortium US LP, Rockstar Consortium LLC, Bockstar Technologies LLC, Constellation Technologies LLC, MobileStar Technologies LLC, and NetStar Technologies LLC (the “Sellers”), for the purchase of substantially all of the patent assets owned or controlled by the Sellers (the “Rockstar Transaction”), as well as other ancillary agreements, including but not limited to an Escrow Agreement by and among the Sellers, Citibank, N.A., acting as escrow agent, RPX Clearinghouse LLC and the Company (the “Escrow Agreement”). Upon the closing of the Rockstar Transaction, syndicate participants received non-exclusive licenses to the patent assets included in the Rockstar Transaction, and RPX Clearinghouse made the patent assets available for license to all other interested companies under fair, reasonable, and non-discriminatory terms. RPX Clearinghouse LLC paid the Sellers $25.0 million as a non-refundable deposit on December 26, 2014 upon the execution of the Asset Purchase Agreement. The third-party funding commitments described below were derived pursuant with the Escrow Agreement and the remaining closing conditions under the Asset Purchase Agreement were met on January 28, 2015 on which date the Rockstar Transaction was consummated and the Sellers received an additional payment of $875.0 million from escrow. RPX Clearinghouse LLC received funding commitments for the Rockstar Transaction from a syndicate of more than 30 companies. The Company evaluated the contributions from syndicate members to determine whether they should be recorded on a gross or net basis. As a result, the Company accounted for these third-party funding commitments on a net basis as it acted as an agent to acquire patent rights from the Sellers on behalf of the syndicate who paid for such rights separately from a subscription agreement. The Company contributed approximately $29.0 million which was recorded as a patent asset upon closing of the Rockstar Transaction and is amortized over its estimated economic useful life of 60 months.

Property and Equipment, Net

Property and Equipment, Net	6 Months Ended
	Jun. 30, 2015
Property, Plant and Equipment, Net, by Type [Abstract]
Property and Equipment, Net	Property and Equipment, Net Property and equipment, net, consisted of the following (in thousands): June 30, December 31, Internal-use software $ 6,523 $ 5,358 Leasehold improvements 1,799 1,799 Computer, equipment and software 1,387 1,221 Furniture and fixtures 818 818 Construction-in-progress — 167 Total property and equipment, gross 10,527 9,363 Less: Accumulated depreciation and amortization (6,110 ) (5,212 ) Total property and equipment, net $ 4,417 $ 4,151 Depreciation and amortization expense was $0.4 million and $0.5 million for the three months ended June 30, 2015 and 2014 , respectively, and $0.9 million and $1.0 million for the six months ended June 30, 2015 and 2014 , respectively. Stock-based compensation capitalized as part of the cost of internal-use software was nil and $0.1 million for the three months ended June 30, 2015 and 2014 , respectively, and nil and $0.1 million for the six months ended June 30, 2015 and 2014 , respectively.

Intangible Assets, Net

Intangible Assets, Net	6 Months Ended
	Jun. 30, 2015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets, Net	Intangible Assets, Net Intangible assets, net, consisted of the following (in thousands): June 30, 2015 December 31, 2014 Carrying Amount Accumulated Amortization Net Carrying Amount Carrying Amount Accumulated Amortization Net Carrying Amount Covenant not to compete $ 1,900 $ (655 ) $ 1,245 $ 1,920 $ (358 ) $ 1,562 Proprietary data and models 2,100 (1,406 ) 694 2,100 (1,119 ) 981 Customer relationships 1,050 (526 ) 524 1,050 (392 ) 658 Trademarks 1,720 (1,520 ) 200 1,890 (1,565 ) 325 Developed technology 120 (120 ) — 433 (433 ) — $ 6,890 $ (4,227 ) $ 2,663 $ 7,393 $ (3,867 ) $ 3,526 As of June 30, 2015 , the Company expects amortization expense in future periods to be as follows (in thousands): 2015 (remainder) $ 862 2016 1,288 2017 513 Total estimated future amortization expense $ 2,663 Amortization expense was $0.4 million and $0.3 million for the three months ended June 30, 2015 and 2014 , respectively, and $0.9 million and $0.6 million for the six months ended June 30, 2015 and 2014 , respectively.

Accrued and Other Current Liabi

Accrued and Other Current Liabilities	6 Months Ended
	Jun. 30, 2015
Payables and Accruals [Abstract]
Accrued And Other Current Liabilities	Accrued Liabilities Accrued liabilities consisted of the following (in thousands): June 30, December 31, Accrued payroll-related expenses $ 7,068 $ 9,270 Accrued expenses 2,047 4,987 Total accrued liabilities $ 9,115 $ 14,257

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	Commitments and Contingencies Operating Lease Commitments The Company generally does not enter into long-term minimum purchase commitments. Its principal long-term commitments consist of obligations under operating leases for office space. There were no substantial changes to the Company’s contractual obligations or commitments during the six months ended June 30, 2015 as compared to those presented under the heading “Commitments and Contingencies” in Note 12 of the Notes to Consolidated Financial Statements in Part II, Item 8 of the Company’s Annual Report on Form 10-K filed with the SEC on March 2, 2015. Rent expense related to non-cancelable operating leases was $0.8 million and $0.9 million for the three months ended June 30, 2015 and 2014 , respectively, net of sublease income of $0.2 million for each period, respectively. Rent expense related to non-cancelable operating leases was $1.7 million and $1.8 million for the six months ended June 30, 2015 and 2014 , respectively, net of sublease income of $0.3 million for each period, respectively. Deferred Payment Obligations In connection with the Rockstar Transaction (see Note 5, "Patent Assets, Net"), the Company acquired certain common stock, convertible preferred stock, and redeemable convertible preferred stock investments held by the Sellers. To fund the acquisition of these securities, the Company received funding of $6.3 million from a syndicate participant and seller financing of $5.9 million . These balances were considered loans in the Company's condensed consolidated balance sheets and were recorded as deferred payment obligations under current liabilities as they are expected to be repaid within 12 months . The loan received from the syndicate participant bears no interest. The terms of the obligation require repayment up to the $6.3 million received only to the extent of proceeds from the sale of the common and convertible preferred stock securities, which resulted in a difference between the funding received and the fair value of the loan. The Company elected to carry this loan at fair value and has categorized it as a Level 3 instrument due to the significance of unobservable inputs developed using company-specific information used to estimate the loan’s fair value. Changes in fair value are reported in other income, net in the Company's condensed consolidated statements of operations. During the six months ended June 30, 2015 , the fair value of this loan decreased from $4.4 million to $3.7 million , resulting in a gain of $0.7 million recognized in other income, net in the condensed consolidated statements of operations. The loan received from the Sellers is carried at cost, bears no interest, and is repayable upon redemption or conversion of the redeemable convertible preferred stock. During the three months ended June 30, 2015 , the Company repaid $0.9 million of the seller financing. At June 30, 2015 , the loan was recorded at $5.0 million . 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 was recorded as of June 30, 2015 or December 31, 2014 . In June 2013, Kevin O’Halloran, as Trustee of the Liquidating Trust of Teltronics, Inc. (the “Debtor”), filed a complaint in the U.S. Bankruptcy Court for the Middle District of Florida against the Company and Harris Corporation (the “Defendants”). The complaint alleges that the Defendants are liable under federal and state bankruptcy law regarding fraudulent transfers for the value of a patent portfolio purchased by the Company from Harris Corporation pursuant to an agreement entered into in January 2009, and within four years of the date the Debtor filed its petition in bankruptcy. 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 potential loss or range of the potential loss that may result from this litigation. In March 2012, Cascades Computer Innovations LLC filed a complaint in U.S. District Court for the Northern District of California (the “Court”) against the Company and five 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 further alleges that after we terminated our 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. In January 2013, the Court dismissed the complaint against the Defendants and granted the plaintiff leave to amend its complaint. In February 2013, the plaintiff filed an amended lawsuit alleging that the Defendants violated federal antitrust law, California antitrust law and California unfair competition law. In March 2014, the Court entered an order staying the litigation pending the resolution of related litigation in the U.S. District Court for the Northern District of Illinois, and has subsequently continued the stay until July 2015. We are not currently able to determine whether there is a reasonable possibility that a loss has been incurred, nor can we estimate the potential loss or range of the potential loss that may result from this litigation. 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. The Company had no liabilities recorded for these agreements as of June 30, 2015 or December 31, 2014 . 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. In accordance with its amended and restated bylaws, the Company also indemnifies certain officers and employees for losses incurred in connection with actions, suits or proceedings threatened or brought against such officer or employee arising from his or her service to the Company as an officer or employee, subject to certain limitations. 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. Reserves for Known and Incurred but not Reported Claims In August 2012, the Company began offering insurance to cover certain costs of litigation brought against its insured clients by NPEs. As of June 30, 2015 , the Company had a total of 62 active policies and had recorded a reserve of $0.5 million for known and incurred but not reported claims that represents estimated claim costs and related expenses. The Company regularly reviews its loss reserves using a variety of actuarial techniques and updates them as its loss experience develops.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2015
Stockholders Equity and Share-based Compensation [Abstract]
Stockholders' Equity	Stockholders’ Equity Equity Plans A summary of the Company’s activity under its equity-settled award plans and related information is as follows (in thousands, except per share data): Options Outstanding Shares Available for Grant Number of Shares Weighted-Average Exercise Price Weighted-Average Remaining Contractual Life in Years Aggregate Intrinsic Value Balance - December 31, 2014 2,685 3,264 $ 10.38 Shares authorized (1) 1,000 — — Options exercised — (663 ) 6.46 Options forfeited/canceled 86 (86 ) 14.15 Restricted stock units granted (1,371 ) — — Restricted stock units forfeited 362 — — Restricted stock units withheld related to net-share settlement of restricted stock units 151 — — Balance - June 30, 2015 2,913 2,515 11.28 5.6 $ 15,738 Vested and exercisable - June 30, 2015 2,038 11.79 5.6 12,016 Vested and expected to vest - June 30, 2015 2,475 11.32 5.6 15,402 ( 1) In March 2015, the Company reserved an additional 1,000,000 shares of its common stock for future issuance under the 2011 Plan. The aggregate intrinsic value of stock options exercised during the three months ended June 30, 2015 and 2014 was $4.3 million and $3.6 million , respectively, and $5.9 million and $5.3 million for stock options exercised during the six months ended June 30, 2015 and 2014 , respectively. The total grant date fair value of stock options vested during the three months ended June 30, 2015 and 2014 was $0.8 million and $1.8 million , respectively, and $1.8 million and $3.5 million for stock options vested during the six months ended June 30, 2015 and 2014 , respectively. Restricted Stock Units The summary of restricted stock unit (“RSU”) activity, which includes performance-based restricted stock units (“PBRSUs”), is as follows (in thousands, except per share data): Number of Shares Weighted-Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested units - December 31, 2014 2,460 $ 13.15 Granted 1,371 13.92 Vested (460 ) 14.25 Forfeited (362 ) 13.08 Non-vested units - June 30, 2015 3,009 13.34 $ 50,831 The total grant date fair value of RSUs vested during the three months ended June 30, 2015 and 2014 was $4.8 million and $5.5 million , respectively, and $7.1 million and $7.9 million for RSUs vested during the six months ended June 30, 2015 and 2014 , respectively. In October 2013, the Board of Directors approved net-share settlement for tax withholdings on RSU vesting. During the six months ended June 30, 2015 , the Company withheld issuing 150,422 shares of its common stock based on the value of the RSUs on their vesting dates as determined by the Company’s closing common stock price. Total payments for employees’ minimum tax obligations to taxing authorities were $2.3 million for the six months ended June 30, 2015 , and were recorded as a reduction to additional paid-in capital and reflected as a financing activity within the condensed consolidated statements of cash flows. The net-share settlements reduced the number of shares that would have otherwise been issued on the vesting date and increased the number of shares reserved for future issuance under the 2011 Plan. Stock-Based Compensation Related to Employees and Directors The fair value of RSUs granted to employees and directors is measured by reference to the fair value of the underlying shares on the date of grant. PBRSUs granted during the six months ended June 30, 2015 contain both service and performance conditions that affect the quantity of awards that will vest. PBRSU's granted during the six months ended June 30, 2014 contain both service and market conditions that affect the quantity of awards that will vest. During the three months ended June 30, 2015 and 2014 , the Company granted 54,375 and nil PBRSUs, respectively. During the six months ended June 30, 2015 and 2014 , the Company granted 54,375 and 200,000 PBRSUs, respectively. The Company estimates the grant date fair value of PBRSUs which include market conditions using the Monte Carlo simulation model which are only applicable for the six months ended June 30, 2014 . The weighted-average assumptions used to estimate the fair value of PBRSUs with market conditions and the resulting fair values are as follows: Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Dividend yield n/a n/a n/a — % Risk-free rate n/a n/a n/a 0.11 % Expected volatility n/a n/a n/a 48 % Grant date fair value n/a n/a n/a $ 7.47 Stock-based compensation expense related to stock options granted to employees and directors was $0.7 million and $1.5 million for the three months ended June 30, 2015 and 2014 , respectively, and $1.5 million and $3.0 million for the six months ended June 30, 2015 and 2014 , respectively. Stock-based compensation expense related to RSUs granted to employees and directors was $3.7 million and $3.4 million for the three months ended June 30, 2015 and 2014 , respectively, and $6.8 million and $5.6 million for the six months ended June 30, 2015 and 2014 , respectively. Stock-based compensation expense related to PBRSUs granted to employees was $0.2 million for each of the three months ended June 30, 2015 and 2014 , respectively, and $0.3 million and $0.4 million for the six months ended June 30, 2015 and 2014 , respectively. As of June 30, 2015 , there was $2.5 million and $36.7 million of unrecognized compensation cost related to stock options and RSUs, including PBRSUs, respectively, which is expected to be recognized over a weighted-average period of 1.0 year and 2.7 years , respectively. Future grants of equity awards will increase the amount of stock-based compensation expense to be recorded. Stock Repurchase Program On February 10, 2015, the Company announced that its Board of Directors had authorized a share repurchase program under which the Company is authorized to repurchase up to $75.0 million of its outstanding common stock with no expiration date from the date of authorization. As of June 30, 2015 , the Company repurchased $3.5 million of the outstanding common stock. Under the program, shares may be purchased in open market transactions, including through block purchases, through privately negotiated transactions, or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). The share repurchase program does not have an expiration date and may be suspended, terminated or modified at any time for any reason. The Company’s share repurchase program does not obligate it to acquire any specific number of shares. The Company repurchased shares of its common stock in the open market, which were retired upon repurchase, during the period presented as follows (in thousands, except per share data): Shares Repurchased Average Price per Share Value of Shares Repurchased Balance as of January 1, 2015 — $ — $ — Repurchase of shares of common stock 238 14.88 3,541 Balance as of June 30, 2015 238 $ 14.88 $ 3,541

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company uses an estimated annual effective tax rate based upon a projection of its annual fiscal year results to measure the income tax benefit or expense recognized in each interim period. The Company’s effective tax rate, including the impact of discrete benefit items, was 39% and 37% for the three months ended June 30, 2015 and 2014 , respectively and 38% and 37% for the six months ended June 30, 2015 and 2014 , respectively. The Company’s 2010 tax year is currently under examination by the 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 2011 through 2013 tax periods remain open to examination by the Internal Revenue Service and the 2010 through 2013 tax periods remain open to examination by most state tax authorities. For the Company's foreign jurisdictions, the 2009 through 2014 tax years remain open to examination by their respective tax authorities.

Related-Party Transactions

Related-Party Transactions	6 Months Ended
	Jun. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related-Party Transactions During the three months ended June 30, 2015 and 2014 , four and five members, respectively, of the Company’s Board of Directors also served on the boards of directors of RPX clients. During each of the six months ended June 30, 2015 and 2014 , five members of the Company's Board of Directors also served on the boards of directors of RPX clients. The Company recognized subscription revenue from these clients in the amount of $2.3 million and $2.2 million for the three months ended June 30, 2015 and 2014 , respectively, and $4.7 million and $4.3 million for the six months ended June 30, 2015 and 2014 , respectively. As of December 31, 2014 , there was $0.1 million of receivables due from these clients. There were no receivables due from these clients as of June 30, 2015 .

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting Operating segments are components of an enterprise about which separate financial information is available. Operating segments are reported in a manner consistent with the internal reporting provided to 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 operating and reportable segment. The Company markets its solution to companies around the world. Revenue is generally attributed to geographic areas based on the country in which the client is domiciled. The following table presents revenue by location and revenue generated by country as a percentage of total revenue for the applicable period, for countries representing 10% or more of revenues for one or more of the periods presented (dollars in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 United States $ 41,949 62 % $ 40,839 64 % $ 96,995 65 % $ 77,944 62 % Korea 7,282 11 4,325 7 13,969 9 8,843 7 Japan 9,153 13 9,293 14 18,485 12 18,849 15 Other 9,167 14 9,836 15 21,389 14 20,545 16 Total revenue $ 67,551 100 % $ 64,293 100 % $ 150,838 100 % $ 126,181 100 %

Basis of Presentation and Sig19

Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated balance sheet as of June 30, 2015 , the condensed consolidated statements of operations, the condensed consolidated statements of comprehensive income and the condensed consolidated statements of cash flows for the six months ended June 30, 2015 and 2014 , are unaudited. The condensed consolidated balance sheet as of December 31, 2014 was derived from the audited consolidated financial statements which are included in the Company’s Form 10-K for the fiscal year ended December 31, 2014 , which was filed with the U.S. Securities and Exchange Commission (“SEC”) on March 2, 2015. The unaudited condensed consolidated financial statements should be read in conjunction with the audited financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 . The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America and with the instructions for Form 10-Q and Regulation S-X for interim financial statements. Accordingly, they do not include all of the information and notes required for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring items, necessary to state fairly the results of the interim periods have been included in the accompanying financial statements. Operating results for the six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for any subsequent interim period or for the year ending December 31, 2015.
Recently Issued Accounting Standards	Recently Adopted Accounting Standards In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which will supersede most existing revenue recognition guidance in U.S. generally accepted accounting principles (“U.S. GAAP”) once it becomes effective. ASU 2014-09 requires an entity to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 will be effective for annual and interim periods beginning after December 15, 2017 and early adoption is permitted for annual and interim periods beginning after December 31, 2016. The Company is currently evaluating the impact of the adoption of ASU 2014-09 on its consolidated financial statements.

Net Income Available to Commo20

Net Income Available to Common Stockholders (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Basic and Diluted Net Income Per Share Available To Common Stockholders	The following table presents the calculation of basic and diluted net income per share (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Numerator: Net income $ 8,030 $ 9,399 $ 26,061 $ 19,259 Denominator: Basic shares: Weighted-average shares used in computing basic net income per share 54,490 53,203 54,334 53,004 Diluted shares: Weighted-average shares used in computing basic net income per share 54,490 53,203 54,334 53,004 Dilutive effect of stock options and restricted stock units using the treasury-stock method 1,197 1,573 1,123 1,618 Weighted-average shares used in computing diluted net income per share 55,687 54,776 55,457 54,622 Net income per share: Basic $ 0.15 $ 0.18 $ 0.48 $ 0.36 Diluted $ 0.14 $ 0.17 $ 0.47 $ 0.35
Anti-Dilutive Securities Not Included In Diluted Shares Outstanding Calculation	The following securities were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Weighted-average: Stock options outstanding 530 757 694 762 Restricted stock units outstanding 139 46 190 37

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Finance Assets Measured At Fair Value On A Recurring Basis	The following tables present the Company's financial assets and liabilities measured at fair value on a recurring basis (in thousands): June 30, 2015 Amortized Cost Unrealized Estimated Fair Value Level 1 Level 2 Level 3 Gains Losses Assets: Cash equivalents: Commercial paper $ 14,798 $ — $ — $ 14,798 $ — $ 14,798 $ — Municipal bonds 1,978 — — 1,978 — 1,978 — Money market funds 7,504 — — 7,504 7,504 — — $ 24,280 $ — $ — $ 24,280 $ 7,504 $ 16,776 $ — Short-term investments: Municipal bonds $ 150,771 $ 15 $ (46 ) 150,740 $ — $ 150,740 $ — Commercial paper 7,295 — — 7,295 — 7,295 — Corporate bonds 65,142 3 (46 ) 65,099 — 65,099 — U.S. government and agency securities 47,064 20 (1 ) 47,083 — 47,083 — Equity securities 577 — (185 ) 392 392 — — $ 270,849 $ 38 $ (278 ) $ 270,609 $ 392 $ 270,217 $ — Liabilities: Current liabilities: Deferred payment obligations $ 4,355 $ 705 $ — $ 3,650 $ — $ — $ 3,650 $ 4,355 $ 705 $ — $ 3,650 $ — $ — $ 3,650 December 31, 2014 Amortized Cost Unrealized Estimated Fair Value Level 1 Level 2 Level 3 Gains Losses Assets: Cash equivalents: Commercial paper $ 5,749 $ — $ — $ 5,749 $ — $ 5,749 $ — U.S. government and agency securities 2,000 — — 2,000 — 2,000 — Municipal bonds 1,409 — — 1,409 — 1,409 — Money market funds 451 — — 451 451 — — $ 9,609 $ — $ — $ 9,609 $ 451 $ 9,158 $ — Short-term investments: Municipal bonds $ 120,270 $ 24 $ (12 ) $ 120,282 $ — $ 120,282 $ — Commercial paper $ 2,498 — — 2,498 — 2,498 — Corporate bonds $ 68,758 1 (87 ) 68,672 — 68,672 — U.S. government and agency securities $ 48,095 — (33 ) 48,062 — 48,062 — $ 239,621 $ 25 $ (132 ) $ 239,514 $ — $ 239,514 $ —

Patent Assets, Net (Tables)

Patent Assets, Net (Tables)	6 Months Ended
	Jun. 30, 2015
Patent Assets, Net [Abstract]
Patent Assets, Net	Patent assets, net, consisted of the following (in thousands): December 31, Additions Disposals June 30, Patent assets $ 665,290 $ 74,136 $ (138 ) $ 739,288 Accumulated amortization (428,941 ) (68,202 ) 53 (497,090 ) Patent assets, net $ 236,349 $ 242,198
Expected Future Annual Amortization Of Patent Assets	As of June 30, 2015 , the Company expects amortization expense in future periods to be as follows (in thousands): 2015 (remainder) $ 66,315 2016 104,029 2017 49,695 2018 14,852 2019 6,864 Thereafter 443 Total estimated future amortization expense $ 242,198

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	6 Months Ended
	Jun. 30, 2015
Property, Plant and Equipment, Net, by Type [Abstract]
Property And Equipment, Net	Property and equipment, net, consisted of the following (in thousands): June 30, December 31, Internal-use software $ 6,523 $ 5,358 Leasehold improvements 1,799 1,799 Computer, equipment and software 1,387 1,221 Furniture and fixtures 818 818 Construction-in-progress — 167 Total property and equipment, gross 10,527 9,363 Less: Accumulated depreciation and amortization (6,110 ) (5,212 ) Total property and equipment, net $ 4,417 $ 4,151

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	6 Months Ended
	Jun. 30, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Net	Intangible assets, net, consisted of the following (in thousands): June 30, 2015 December 31, 2014 Carrying Amount Accumulated Amortization Net Carrying Amount Carrying Amount Accumulated Amortization Net Carrying Amount Covenant not to compete $ 1,900 $ (655 ) $ 1,245 $ 1,920 $ (358 ) $ 1,562 Proprietary data and models 2,100 (1,406 ) 694 2,100 (1,119 ) 981 Customer relationships 1,050 (526 ) 524 1,050 (392 ) 658 Trademarks 1,720 (1,520 ) 200 1,890 (1,565 ) 325 Developed technology 120 (120 ) — 433 (433 ) — $ 6,890 $ (4,227 ) $ 2,663 $ 7,393 $ (3,867 ) $ 3,526
Expected Future Annual Amortization Of Intangible Assets	As of June 30, 2015 , the Company expects amortization expense in future periods to be as follows (in thousands): 2015 (remainder) $ 66,315 2016 104,029 2017 49,695 2018 14,852 2019 6,864 Thereafter 443 Total estimated future amortization expense $ 242,198
Intangible Assets Net
Acquired Finite-Lived Intangible Assets [Line Items]
Expected Future Annual Amortization Of Intangible Assets	As of June 30, 2015 , the Company expects amortization expense in future periods to be as follows (in thousands): 2015 (remainder) $ 862 2016 1,288 2017 513 Total estimated future amortization expense $ 2,663

Accrued and Other Current Lia25

Accrued and Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2015
Payables and Accruals [Abstract]
Accrued And Other Current Liabilities	Accrued liabilities consisted of the following (in thousands): June 30, December 31, Accrued payroll-related expenses $ 7,068 $ 9,270 Accrued expenses 2,047 4,987 Total accrued liabilities $ 9,115 $ 14,257

Stockholders_ Equity (Tables)

Stockholders’ Equity (Tables)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Stockholders Equity and Share-based Compensation [Abstract]
Schedule of Repurchase Agreements [Table Text Block]	The Company repurchased shares of its common stock in the open market, which were retired upon repurchase, during the period presented as follows (in thousands, except per share data): Shares Repurchased Average Price per Share Value of Shares Repurchased Balance as of January 1, 2015 — $ — $ — Repurchase of shares of common stock 238 14.88 3,541 Balance as of June 30, 2015 238 $ 14.88 $ 3,541
Restricted Stock Unit Activity	The summary of restricted stock unit (“RSU”) activity, which includes performance-based restricted stock units (“PBRSUs”), is as follows (in thousands, except per share data): Number of Shares Weighted-Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested units - December 31, 2014 2,460 $ 13.15 Granted 1,371 13.92 Vested (460 ) 14.25 Forfeited (362 ) 13.08 Non-vested units - June 30, 2015 3,009 13.34 $ 50,831
Activity Under Equity Settled Award Plans And Related Information	A summary of the Company’s activity under its equity-settled award plans and related information is as follows (in thousands, except per share data): Options Outstanding Shares Available for Grant Number of Shares Weighted-Average Exercise Price Weighted-Average Remaining Contractual Life in Years Aggregate Intrinsic Value Balance - December 31, 2014 2,685 3,264 $ 10.38 Shares authorized (1) 1,000 — — Options exercised — (663 ) 6.46 Options forfeited/canceled 86 (86 ) 14.15 Restricted stock units granted (1,371 ) — — Restricted stock units forfeited 362 — — Restricted stock units withheld related to net-share settlement of restricted stock units 151 — — Balance - June 30, 2015 2,913 2,515 11.28 5.6 $ 15,738 Vested and exercisable - June 30, 2015 2,038 11.79 5.6 12,016 Vested and expected to vest - June 30, 2015 2,475 11.32 5.6 15,402 ( 1) In March 2015, the Company reserved an additional 1,000,000 shares of its common stock for future issuance under the 2011 Plan.
Weighted-Average Assumptions Used To Estimate The Fair Value Of PBRSUs		The weighted-average assumptions used to estimate the fair value of PBRSUs with market conditions and the resulting fair values are as follows: Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Dividend yield n/a n/a n/a — % Risk-free rate n/a n/a n/a 0.11 % Expected volatility n/a n/a n/a 48 % Grant date fair value n/a n/a n/a $ 7.47

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Revenue By Location	The following table presents revenue by location and revenue generated by country as a percentage of total revenue for the applicable period, for countries representing 10% or more of revenues for one or more of the periods presented (dollars in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 United States $ 41,949 62 % $ 40,839 64 % $ 96,995 65 % $ 77,944 62 % Korea 7,282 11 4,325 7 13,969 9 8,843 7 Japan 9,153 13 9,293 14 18,485 12 18,849 15 Other 9,167 14 9,836 15 21,389 14 20,545 16 Total revenue $ 67,551 100 % $ 64,293 100 % $ 150,838 100 % $ 126,181 100 %
Long-Lived Assets Information By Location

Net Income Available to Commo28

Net Income Available to Common Stockholders (Detail) - Basic and Diluted Net Income Per Share Available To Common Stockholders - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net income	$ 8,030	$ 9,399	$ 26,061	$ 19,259
Basic shares:
Weighted-average shares used in computing basic net income per share	54,490	53,203	54,334	53,004
Diluted shares:
Dilutive effect of stock options and restricted stock units using the treasury-stock method	1,197	1,573	1,123	1,618
Weighted-average shares used in computing diluted net income per share	55,687	54,776	55,457	54,622
Net income per share:
Basic (dollars per common share)	$ 0.15	$ 0.18	$ 0.48	$ 0.36
Diluted (dollars per common share)	$ 0.14	$ 0.17	$ 0.47	$ 0.35

Net Income Available to Commo29

Net Income Available to Common Stockholders (Detail) - Anti-Dilutive Securities Not Included In Diluted Shares Outstanding Calculation - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stock options outstanding
Weighted-average:
Weighted-average anti-dilutive securities	530	757	694	762
Restricted stock units outstanding
Weighted-average:
Weighted-average anti-dilutive securities	139	46	190	37

Financial Instruments (Detail)

Financial Instruments (Detail) - Financial Assets Measured At Fair Value On A Recurring Basis - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Document Period End Date	Jun. 30, 2015
Cash equivalents	$ 24,280	$ 9,609
Short-term investments, amortized Cost	270,849	239,621
Short-term investments, unrealized gains	38	25
Short-term investments, unrealized losses	(278)	(132)
Short-term investments, total estimated fair value	270,609	239,514
Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred payment obligation, amortized cost	4,355
Deferred payment obligation, unrealized gains	705
Deferred payment obligation, estimated fair value	3,650
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	7,504	451
Short-term investments, estimated fair value	392	0
Fair Value, Inputs, Level 1 | Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred payment obligation, estimated fair value	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	16,776	9,158
Short-term investments, estimated fair value	270,217	239,514
Fair Value, Inputs, Level 2 | Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred payment obligation, estimated fair value	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Short-term investments, estimated fair value	0	0
Fair Value, Inputs, Level 3 | Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred payment obligation, estimated fair value	3,650
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, amortized Cost	150,771	120,270
Short-term investments, unrealized gains	15	24
Short-term investments, unrealized losses	(46)	(12)
Short-term investments, total estimated fair value	150,740	120,282
Municipal bonds | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
Municipal bonds | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	150,740	120,282
Municipal bonds | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, amortized Cost	7,295	2,498
Short-term investments, unrealized gains	0	0
Short-term investments, unrealized losses	0	0
Short-term investments, total estimated fair value	7,295	2,498
Commercial paper | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
Commercial paper | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	7,295	2,498
Commercial paper | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, amortized Cost	65,142	68,758
Short-term investments, unrealized gains	3	1
Short-term investments, unrealized losses	(46)	(87)
Short-term investments, total estimated fair value	65,099	68,672
Corporate bonds | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
Corporate bonds | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	65,099	68,672
Corporate bonds | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, amortized Cost	47,064	48,095
Short-term investments, unrealized gains	20	0
Short-term investments, unrealized losses	(1)	(33)
Short-term investments, total estimated fair value	47,083	48,062
U.S. government and agency securities | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
U.S. government and agency securities | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	47,083	48,062
U.S. government and agency securities | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0	0
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, amortized Cost	577
Short-term investments, unrealized gains	0
Short-term investments, unrealized losses	(185)
Short-term investments, total estimated fair value	392
Equity securities | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	392
Equity securities | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0
Equity securities | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, estimated fair value	0
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	14,798	5,749
Commercial paper | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Commercial paper | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	14,798	5,749
Commercial paper | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		2,000
U.S. government and agency securities | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		0
U.S. government and agency securities | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		2,000
U.S. government and agency securities | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		0
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	1,978	1,409
Municipal bonds | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Municipal bonds | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	1,978	1,409
Municipal bonds | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	7,504	451
Money market funds | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	7,504	451
Money market funds | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Money market funds | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 0	$ 0

Financial Instruments (Detail)

Financial Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2015	Jun. 30, 2014
Investment Holdings [Line Items]
Document Period End Date			Jun. 30, 2015
Held-to-maturity Securities	$ 5,000	$ 0	$ 5,000
Cost Method Investments	$ 3,700	$ 0	$ 3,700
Percentage of marketable securities investments maturing within one year	79.00%	76.00%	79.00%
Percentage of marketable securities investments maturing within one to five years	21.00%	24.00%	21.00%
Funding from a syndicate participant			$ 6,270	$ 0
Other Debt Obligations
Investment Holdings [Line Items]
Fair value of loan from syndicate participant	$ 3,650		3,650
Fair Value, Inputs, Level 3 | Other Debt Obligations
Investment Holdings [Line Items]
Fair value of loan from syndicate participant	$ 3,650		$ 3,650
Minimum
Investment Holdings [Line Items]
Maturity term within one year (in years)	1 year	1 year
Maturity term within one to five years (in years)	1 year	1 year
Maximum
Investment Holdings [Line Items]
Maturity term within one to five years (in years)	5 years	5 years

Patent Assets, Net (Detail)

Patent Assets, Net (Detail) $ in Thousands	Jan. 28, 2015USD ($)syndicate_company	Dec. 26, 2012USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)
Finite-Lived Intangible Assets [Line Items]
Document Period End Date					Jun. 30, 2015
Accumulated amortization - Additions			$ 400	$ 300	$ 900	$ 600
Patents
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization - Additions			$ 35,100	$ 30,100	$ 68,202	$ 57,700
Minimum | Patents
Finite-Lived Intangible Assets [Line Items]
Patent assets, useful life					24 months
Maximum | Patents
Finite-Lived Intangible Assets [Line Items]
Patent assets, useful life					60 months
Weighted Average | Patents
Finite-Lived Intangible Assets [Line Items]
Patent assets, useful life			45 months
Subsidiaries [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 29,000
Contributions to Escrow Deposit		$ 25,000
Number of Companies Involved in Syndicate | syndicate_company	30
Subsidiaries [Member] | Patents
Finite-Lived Intangible Assets [Line Items]
Patent assets, useful life	60 months
The Sellers [Member]
Finite-Lived Intangible Assets [Line Items]
Contributions to Escrow Deposit	$ 875,000

Patent Assets, Net (Detail) - P

Patent Assets, Net (Detail) - Patent Assets, Net - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Document Period End Date			Jun. 30, 2015
Finite-lived Intangible Assets [Roll Forward]
Patent assets, beginning balance				$ 7,393
Patent assets - Additions			$ 48,936	73,948
Patent assets, ending balance	$ 6,890		6,890
Accumulated amortization, beginning balance				(3,867)
Accumulated amortization - Additions	(400)	$ (300)	(900)	(600)
Accumulated amortization, ending balance	(4,227)		(4,227)
Patent assets, net	242,198		242,198		$ 236,349
Patents
Finite-lived Intangible Assets [Roll Forward]
Patent assets, beginning balance				665,290
Patent assets - Additions			74,136
Patent assets - Sales			(138)
Patent assets, ending balance	739,288		739,288
Accumulated amortization, beginning balance				(428,941)
Accumulated amortization - Additions	(35,100)	$ (30,100)	(68,202)	$ (57,700)
Accumulated amortization - Sales			53
Accumulated amortization, ending balance	(497,090)		(497,090)
Patent assets, net	$ 242,198		$ 242,198			$ 236,349
Minimum | Patents
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			24 months
Maximum | Patents
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			60 months
Weighted Average [Member] | Patents
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	45 months

Patent Assets, Net (Detail) - E

Patent Assets, Net (Detail) - Expected Future Annual Amortization Expense Of Patent Assets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
2015 (remainder)	$ 862
2,015	1,288
2,016	513
Patent assets, net	242,198	$ 236,349
Patents
Finite-Lived Intangible Assets [Line Items]
2015 (remainder)	66,315
2,015	104,029
2,016	49,695
2,017	14,852
2,018	6,864
Thereafter	443
Patent assets, net	$ 242,198		$ 236,349

Property and Equipment, Net (De

Property and Equipment, Net (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense			$ 69,991,000	$ 59,289,000
Internal-use software
Property, Plant and Equipment [Line Items]
Stock-based compensation capitalized as part of internal-use software	$ 100,000	$ 0	0	100,000
Property and equipment, types
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 400,000	$ 500,000	$ 900,000	$ 1,000,000

Property and Equipment, Net (36

Property and Equipment, Net (Detail) - Property And Equipment, Net - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 10,527		$ 9,363
Less: Accumulated depreciation and amortization	(6,110)		(5,212)
Total property and equipment, net	4,417	$ 4,151	4,151
Internal-use software
Property, Plant and Equipment [Line Items]
Internal-use software	6,523		5,358
Leasehold improvements
Property, Plant and Equipment [Line Items]
Leasehold improvements	1,799		1,799
Computer, equipment and software
Property, Plant and Equipment [Line Items]
Computer, equipment and software	1,387		1,221
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Furniture and fixtures	818		818
Construction-in-progress
Property, Plant and Equipment [Line Items]
Construction-in-progress	$ 0		$ 167

Intangible Assets, Net (Detail)

Intangible Assets, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortization of intangible assets	$ 0.4	$ 0.3	$ 0.9	$ 0.6

Intangible Assets, Net (Detai38

Intangible Assets, Net (Detail) - Intangible Assets, Net - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 400	$ 300	$ 900	$ 600
Carrying amount	6,890		6,890		$ 7,393
Accumulated amortization	(4,227)		(4,227)		(3,867)
Total estimated future amortization expense	2,663		2,663		3,526
Covenant not to compete
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	1,900		1,900		1,920
Accumulated amortization	(655)		(655)		(358)
Total estimated future amortization expense	1,245		1,245		1,562
Proprietary data and models
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	2,100		2,100		2,100
Accumulated amortization	(1,406)		(1,406)		(1,119)
Total estimated future amortization expense	694		694		981
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	1,050		1,050		1,050
Accumulated amortization	(526)		(526)		(392)
Total estimated future amortization expense	524		524		658
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	1,720		1,720		1,890
Accumulated amortization	(1,520)		(1,520)		(1,565)
Total estimated future amortization expense	200		200		325
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	120		120		433
Accumulated amortization	(120)		(120)		(433)
Total estimated future amortization expense	$ 0		$ 0		$ 0

Intangible Assets, Net (Detai39

Intangible Assets, Net (Detail) - Estimated Future Amortization Expenses For Intangible Assets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract]
2015 (remainder)	$ 862
2,015	1,288
2,016	513
Total estimated future amortization expense	$ 2,663	$ 3,526

Accrued and Other Current Lia40

Accrued and Other Current Liabilities (Detail) - Accrued And Other Current Liabilities - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Accrued liabilities	$ 9,115	$ 14,257	$ 14,257
Other current liabilities	502	$ 640
Accrued payroll-related expenses
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Accrued liabilities	7,068		9,270
Accrued expenses
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Accrued liabilities	$ 2,047		$ 4,987

Commitments and Contingencies (

Commitments and Contingencies (Detail) $ in Thousands	Mar. 31, 2012defendant	Jun. 30, 2015USD ($)insurance_policy	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)insurance_policy	Jun. 30, 2014USD ($)	Jan. 28, 2015USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Document Period End Date				Jun. 30, 2015
Loss Contingency, Number of Defendants | defendant	5
Rent expense related to non-cancelable operating leases net of sublease income		$ 800	$ 900	$ 1,700	$ 1,800
Sublease income		200		300
Repayments of Deferred Payment Obligations		$ 900		$ 935	0
Number of active insurance policies | insurance_policy		62		62
Reserves for known and incurred but not reported claims		$ 500		$ 500
Proceeds from deferred payment obligations				6,270	$ 0
Debt Instrument, Repayable Upon Redemption, Preferred Stock		5,000		5,000		$ 5,900
Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Amortized Cost		4,355		4,355
Fair value of loan from syndicate participant		3,650		3,650
Fair Value, Inputs, Level 3 | Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of loan from syndicate participant		$ 3,650		3,650
Gain recognized as a result of changes in fair value				$ 700

Stockholders_ Equity (Detail)

Stockholders’ Equity (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares of common stock reserved for issuance under the 2011 Plan (in shares)	[1]			1,000,000
Aggregate intrinsic value of stock options exercised		$ 4,300	$ 3,600	$ 5,900	$ 5,300
Total fair value of stock options vested		800	1,800	1,800	3,500
Total fair value of RSUs vested		$ 4,800	$ 5,500	$ 7,100	7,900
Shares withheld for tax withholdings (in shares)				150,422
Total payments for the employees’ minimum tax obligations to taxing authorities				$ 2,307	$ 2,675
PBRSUs granted (in shares)		54,375	0	54,375	200,000
Document Period End Date				Jun. 30, 2015
Stock Repurchase Program, Authorized Amount		$ 75,000		$ 75,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		700	$ 1,500	1,500	$ 3,000
Unrecognized compensation cost related to unvested equity awards		2,500		$ 2,500
Weighted-average service period of unrecognized compensation cost related to unvested equity awards				1 year
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		3,700	3,400	$ 6,800	5,600
Unrecognized compensation cost related to unvested equity awards		36,700		$ 36,700
Weighted-average service period of unrecognized compensation cost related to unvested equity awards				2 years 8 months
Performance-based restricted stock units with a market condition
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 200	$ 200	$ 300	$ 400
2011 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares of common stock reserved for issuance under the 2011 Plan (in shares)				1,000,000
[1]	In March 2015, the Company reserved an additional 1,000,000 shares of its common stock for future issuance under the 2011 Plan.

Stockholders_ Equity (Detail) -

Stockholders’ Equity (Detail) - Activity Under Equity Award Plans And Related Information - Jun. 30, 2015 - USD ($) $ / shares in Units, $ in Thousands		Total
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares Available for Grant - Shares authorized (in shares)	[1]	1,000,000
Number of Shares - Options exercised (in shares)		(663,000)
Weighted Average Exercise Price - Options exercised (in dollars per share)		$ 6.46
Shares Available for Grant - Options forfeited/canceled		86,000
Number of Shares - Options forfeited/canceled (in shares)		(86,000)
Weighted-Average Exercise Price - Options forfeited/canceled (in dollars per share)		$ 14.15
Share Available for Grant - Restricted stock units granted (in shares)		(1,371,000)
Shares Available for Grant - Restricted stock units forfeited (in shares)		362,000
Shares Available for Grant - Restricted stock units withheld related to net-share settlement of restricted stock units (in shares)		151,000
Shares Available for Grant - Outstanding, ending balance (in shares)		2,913,000
Number of Shares - Outstanding, ending balance (in shares)		2,515,000
Weighted-Average Exercise Price - Outstanding, ending balance (in dollars per share)		$ 11.28
Outstanding (weighted-average contractual life)		5 years 6 months 24 days
Outstanding (intrinsic value)		$ 15,738
Vested and exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Vested and exercisable (shares)		2,038,000
Vested and exercisable (in dollars per share)		$ 11.79
Vested and exercisable (weighted-average contractual life)		5 years 6 months 24 days
Vested and exercisable (intrinsic value)		$ 12,016
Vested and expected to vest
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Vested and expected to vest (shares)		2,475,000
Vested and expected to vest (in dollars per share)		$ 11.32
Vested and expected to vest (weighted-average contractual life)		5 years 6 months 24 days
Vested and expected to vest (intrinsic value)		$ 15,402
[1]	In March 2015, the Company reserved an additional 1,000,000 shares of its common stock for future issuance under the 2011 Plan.

Stockholders_ Equity (Detail)44

Stockholders’ Equity (Detail) - Restricted Stock Unit Activity - Jun. 30, 2015 - USD ($) $ / shares in Units, $ in Thousands	Total
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested units, ending balance (in shares)	3,009,000
Non-vested units, ending balance (in dollars per share)	$ 13.34
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, intrinsic value	$ 50,831
Restricted stock units granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)	1,371,000
Granted (in dollars per share)	$ 13.92
Restricted stock units vested
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested (in shares)	(460,000)
Vested (in dollars per share)	$ 14.25
Restricted stock units forfeited
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Forfeited (in shares)	(362,000)
Forfeited (in dollars per share)	$ 13.08

Stockholders_ Equity (Detail)45

Stockholders’ Equity (Detail) - Weighted Average Assumptions To Estimate The Fair Value Of Equity Awards - 6 months ended Jun. 30, 2014 - Performance-based restricted stock units with a market condition - $ / shares	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate	0.11%
Expected volatility	48.00%
Grant date fair value	$ 7.47

Stockholders' Equity Stockholde

Stockholders' Equity Stockholders’ Equity (Detail) - Repurchased and Retired Common Stock - 6 months ended Jun. 30, 2015 - USD ($) $ / shares in Units, shares in Thousands	Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased, balance as of beginning of period	$ 0
Shares repurchased, repurchase of shares of common stock	238
Shares repurchased, balance as of end of period	$ 238,000
Shares repurchased, average price per share at beginning of period (usd per share)	$ 0
Shares repurchased, average price per share for repurchase of shares of common stock (usd per share)	14.88
Shares repurchased, average price per share at end of period (usd per share)	$ 14.88
Shares repurchased, value of shares repurchased as of beginning of period	$ 0
Shares repurchased, value of repurchase of shares of common stock	3,541,000
Shares repurchased, value of shares repurchased as of end of period	$ 3,541,000

Income Taxes Income Taxes (Deta

Income Taxes Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Effective tax rate	39.00%	37.00%	38.00%	37.00%

Related-Party Transactions (Det

Related-Party Transactions (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013
Related Party Transactions [Abstract]
Subscription fee revenue from related party transaction	$ 2,300,000	$ 2,200,000	$ 4,700,000	$ 4,300,000
Receivables due from related parties	$ 0		$ 0		$ 100,000

Segment Reporting (Detail)

Segment Reporting (Detail)	6 Months Ended
	Jun. 30, 2015segment
Segment Reporting [Abstract]
Number of reportable segments	1

Segment Reporting (Detail) - Re

Segment Reporting (Detail) - Revenue By Location - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Total revenue	$ 67,551	$ 64,293	$ 150,838	$ 126,181
Total revenue	100.00%	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
United States	62.00%	64.00%	65.00%	62.00%
Total revenue	$ 41,949	$ 40,839	$ 96,995	$ 77,944
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
United States	11.00%	7.00%	9.00%	7.00%
Total revenue	$ 7,282	$ 4,325	$ 13,969	$ 8,843
Japan
Segment Reporting Information [Line Items]
Other foreign country	13.00%	14.00%	12.00%	15.00%
Total revenue	$ 9,153	$ 9,293	$ 18,485	$ 18,849
Other
Segment Reporting Information [Line Items]
Other foreign country	14.00%	15.00%	14.00%	16.00%
Total revenue	$ 9,167	$ 9,836	$ 21,389	$ 20,545

Uncategorized Items - rpxc-2015

Label	Element	Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	$ 10.38
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	2,685,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3,264,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2,460,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	$ 13.15