Cornerstone OnDemand (CSOD) 10-Q 6 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Document Documentand Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'CSOD	'
Entity Registrant Name	'CORNERSTONE ONDEMAND INC	'
Entity Central Index Key	'0001401680	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	52,031,735

Consolidated_Balance_Sheets_un

Consolidated Balance Sheets (unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Cash and cash equivalents	$89,641	$76,442
Short-term Investments	142,096	0
Accounts receivable, net	55,612	47,528
Deferred commissions	12,436	9,354
Prepaid expenses and other current assets	13,094	8,249
Total current assets	312,879	141,573
Capitalized software development costs, net	9,572	7,007
Property and equipment, net	12,014	7,947
Long-term Investments	58,813	0
Intangible assets, net	5,195	6,887
Goodwill	8,193	8,193
Other assets, net	6,129	227
Total Assets	412,795	171,834
Liabilities:	'	'
Accounts payable	7,237	4,849
Accrued expenses	17,210	14,986
Deferred revenue, current portion	106,799	87,759
Capital lease obligations, current portion	1,124	1,643
Debt, current portion	514	916
Other liabilities	4,245	3,885
Total current liabilities	137,129	114,038
Convertible notes, net	216,236	0
Other liabilities, non-current	3,418	3,592
Deferred revenue, net of current portion	2,413	4,493
Capital lease obligations, net of current portion	357	1,227
Other long-term debt, net of current portion	534	1,836
Total liabilities	360,087	125,186
Commitments and contingencies (Note 10)	'	'
Stockholders' Equity:	'	'
Common stock, $0.0001 par value; 1,000,000 shares authorized, 51,942 and 50,689 shares issued and outstanding at September 30, 2013 and December 31, 2012	5	5
Additional paid-in capital	278,214	242,767
Accumulated deficit	-225,712	-196,041
Accumulated other comprehensive income (loss)	201	-83
Total stockholders' equity	52,708	46,648
Total Liabilities and Stockholders' Equity	$412,795	$171,834

Consolidated_Balance_Sheets_un1

Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	51,942,000	50,689,000
Common stock, shares outstanding	51,942,000	50,689,000

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue	$48,270	$30,768	$130,273	$81,488
Cost of revenue	13,644	9,135	38,060	23,869
Gross profit	34,626	21,633	92,213	57,619
Operating expenses:	'	'	'	'
Sales and marketing	28,601	18,624	77,885	52,283
Research and development	5,716	4,101	15,367	10,625
General and administrative	8,261	6,600	24,357	18,346
Amortization of certain acquired intangible assets	251	251	753	488
Total operating expenses	42,829	29,576	118,362	81,742
Loss from operations	-8,203	-7,943	-26,149	-24,123
Other income (expense):	'	'	'	'
Interest income	151	0	152	0
Interest expense	-2,977	-121	-3,562	-358
Other, net	79	139	-143	-42
Other income (expense), net	-2,747	18	-3,553	-400
Loss before income tax (provision) benefit	-10,950	-7,925	-29,702	-24,523
Income tax (provision) benefit	-104	298	31	550
Net loss	($11,054)	($7,627)	($29,671)	($23,973)
Net loss per share, basic and diluted	($0.21)	($0.15)	($0.58)	($0.48)
Weighted average common shares outstanding, basic and diluted (in shares)	51,544	50,163	51,164	49,755

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Loss (unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net loss	($11,054)	($7,627)	($29,671)	($23,973)
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'	'	'
Foreign currency translation adjustment	-547	-271	171	-269
Net change in unrealized gains (losses) on investments	113	0	113	0
Other comprehensive income (loss), net of tax	-434	-271	284	-269
Total comprehensive loss	($11,488)	($7,898)	($29,387)	($24,242)

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:	'	'
Net loss	($29,671)	($23,973)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'
Depreciation and amortization	6,997	4,939
Accretion of debt discount and amortization of debt issuance costs	2,267	106
Purchased investment premium, net of amortization	-3,031	0
Unrealized foreign exchange loss (gain)	375	-37
Stock-based compensation expense	14,263	8,297
Deferred income taxes	-350	-652
Changes in operating assets and liabilities:	'	'
Accounts receivable	-8,045	-10,058
Deferred commissions	-3,041	-572
Prepaid expenses and other assets	-4,249	-3,408
Accounts payable	3,011	1,656
Accrued expenses	2,308	1,124
Deferred revenue	16,562	15,743
Other liabilities	540	3,042
Net cash used in operating activities	-2,064	-3,793
Cash flows from investing activities:	'	'
Purchases of investment securities	-203,959	0
Maturities and sales of investment securities	5,459	0
Purchases of property and equipment	-6,467	-347
Capitalized software costs	-4,987	-3,662
Cash paid for acquisition, net of cash acquired	0	-12,428
Net cash used in investing activities	-209,954	-16,437
Cash flows from financing activities:	'	'
Proceeds from issuance of convertible notes, net	245,664	0
Payments for convertible note hedges	-49,537	0
Proceeds from the issuance of warrants	23,225	0
Proceeds from issuance of debt	1,914	0
Repayment of debt	-3,901	-1,250
Principal payments under capital lease obligations	-1,389	-1,396
Proceeds from stock option and warrant exercises	9,238	1,983
Net cash provided by (used in) financing activities	225,214	-663
Effect of exchange rate changes on cash and cash equivalents	3	-24
Net increase (decrease) in cash and cash equivalents	13,199	-20,917
Cash and cash equivalents at beginning of period	76,442	85,409
Cash and cash equivalents at end of period	89,641	64,492
Supplemental cash flow information:	'	'
Cash paid for interest	209	257
Cash paid for income taxes	457	84
Non-cash investing and financing activities:	'	'
Assets acquired under capital leases and other financing arrangements	88	2,833
Common stock issued for business acquisition	0	335
Capitalized assets financed by accounts payable	150	844
Capitalized stock-based compensation	$639	$380

Organization_And_Summary_Of_Si

Organization And Summary Of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization And Summary Of Significant Accounting Policies	'
	ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Company Overview
	Cornerstone OnDemand, Inc. (“Cornerstone” or the “Company”) was incorporated on May 24, 1999 in the state of Delaware and began its principal operations in November 1999.
	The Company is a leading global provider of comprehensive talent management solutions delivered as Software-as-a-Service (“SaaS”). The Company’s core solution consists of four integrated clouds for recruiting, learning management, performance management and extended enterprise. Customers may subscribe to one or more of the clouds.
	The Company’s solutions are designed to enable organizations to meet the challenges they face in empowering and maximizing the productivity of their human capital. These challenges include developing employees throughout their careers, engaging all employees effectively, improving business execution, cultivating future leaders, and integrating with an organization’s extended enterprise of clients, vendors and distributors by delivering training, certification programs and other content. Management has determined that it operates in one segment as it only reports financial information on an aggregate and consolidated basis to its chief executive officer, who is the Company’s chief operating decision maker.
	The Company also offers Cornerstone Small Business, a talent management solution for small businesses and Cornerstone for Salesforce, a cloud-based talent management solution developed on the Salesforce.com platform which allows organizations to provide access to sales enablement and just-in-time training from within Salesforce.
	Office Locations
	The Company is headquartered in Santa Monica, California and has offices in Auckland, Hong Kong, London, Mumbai, Munich, Madrid, Paris, Rome, Sydney, Tel Aviv, and Tokyo.
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with (i) United States generally accepted accounting principles (“GAAP”) for interim financial information and (ii) the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, such financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the financial statements include all adjustments (consisting of normal recurring adjustments) considered necessary for the fair statement of the interim periods presented. Results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013, for any other interim period or for any other future year.
	The condensed consolidated balance sheet at December 31, 2012 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP.
	The Company’s significant accounting policies were described in “Note 1. Summary of Significant Accounting Policies” in the Annual Report on Form 10-K for the year ended December 31, 2012. The Company follows the same accounting policies for interim reporting. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and related notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2012.
	Recent Accounting Pronouncements
	In February 2013, the Financial Accounting Standards Board (“FASB”) issued a new accounting standards update amending the accounting guidance for the presentation of comprehensive income to improve the reporting of reclassifications out of accumulated other comprehensive income. The amendment requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by significant component. The new standard is effective prospectively for reporting periods beginning after December 15, 2012. The new guidance is not expected to have a significant impact on the Company’s disclosures and does not have an impact on the Company’s results of operations or financial position.
	In March 2013, the FASB issued new accounting guidance clarifying the accounting for the release of cumulative translation adjustment into net income when a company either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning on or after December 15, 2013. The Company does not anticipate that the adoption of this guidance will have a significant impact on its financial position, results of operations or cash flows.
	In July 2013, the FASB issued a new accounting standards update amending the guidance related to the presentation of unrecognized tax benefits. The accounting standards update states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The new standard is effective for annual and interim periods for fiscal years beginning after December 15, 2013, and early adoption is permitted. The new guidance will not have a significant impact on the Company’s results of operations or financial position.

Business_Acquisition

Business Acquisition	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Business Acquisition	'
	BUSINESS ACQUISITION
	On April 5, 2012, the Company completed the acquisition of all of the issued and outstanding shares of Sonar Limited (“Sonar”), a New Zealand based SaaS talent management vendor serving small businesses worldwide.
	Unaudited Pro Forma Financial Information
	The following table reflects the unaudited pro forma consolidated results of operations for the nine months ended September 30, 2012 as if the Sonar acquisition had taken place on January 1, 2011, after giving effect to certain adjustments including the amortization of acquired intangible assets and the associated tax effect and the elimination of the Company’s and Sonar’s non-recurring acquisition-related expenses (in thousands):
		Nine Months Ended
		September 30,
		2013			2012
		Actual			Pro Forma
	Revenue	$	130,273		$	82,491
	Net loss	$	(29,671	)	$	(23,655	)
	The unaudited pro forma information presented does not purport to be indicative of the results that would have been achieved had the acquisition been consummated as of January 1, 2011 nor of the results which may occur in the future. The pro forma adjustments are based upon available information and certain assumptions that the Company believes are reasonable. The unaudited pro forma information does not include any adjustments for any restructuring activities, operating efficiencies or cost savings.

Net_Loss_Per_Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Net Loss Per Share	'
	NET LOSS PER SHARE
	The following table presents our basic and diluted loss per share (in thousands, except per share amounts):
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013				2012			2013			2012
	Net loss	$	(11,054	)		$	(7,627	)	$	(29,671	)	$	(23,973	)
	Weighted-average shares of common stock outstanding	51,544				50,163			51,164			49,755
	Net loss per share – basic and diluted	$	(0.21	)		$	(0.15	)	$	(0.58	)	$	(0.48	)
	At September 30, 2013 and 2012, anti-dilutive shares excluded from the calculation of diluted net loss per share were (in thousands):
		September 30,
		2013			2012
	Options to purchase common stock and restricted stock units	7,716			7,059
	Convertible notes	4,682			—
	Common stock warrants	4,682			—
	Shares issued for purchase consideration held in escrow	—			16
	Common stock subject to repurchase right	—			15
	Other restricted common stock	22			31
	Total shares excluded from net loss per share	17,102			7,121
	Under the treasury stock method, the convertible notes and common stock warrants will have a dilutive impact on net earnings per share when the average stock price for the period exceeds the respective conversion prices and the Company has net income attributable to common stockholders. See Note 7 of the Notes to Condensed Consolidated Financial Statements.

Investments_Investments

Investments Investments	9 Months Ended
	Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'
Cash, Cash Equivalents, and Marketable Securities [Text Block]	'
	4. INVESTMENTS
	The Company’s investments in available-for-sale marketable securities are made within the guidelines of its investment policy, which has established guidelines relative to the diversification of the Company’s investments and their maturities, with the principle objective of capital preservation and maintaining liquidity that is sufficient to meet cash flow requirements.
	The following is a summary of investments, including cash equivalents, as of September 30, 2013 (in thousands):
		30-Sep-13
		Amortized Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
	Money market funds	$	69,066	$	—	$	—		$	69,066
	Corporate bonds	79,288		81		(2		)	79,367
	Agency bonds	121,508		44		(10		)	121,542
		$	269,862	$	125	$	(12	)	$	269,975
	The Company’s investment in marketable securities had a weighted-average maturity date of approximately eight months. Unrealized gains and losses on investments were not significant, and the Company does not believe the unrealized losses represent other-than-temporary impairments as of September 30, 2013.

Intangible_Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Intangible Assets	'
	INTANGIBLE ASSETS
	The Company has finite-lived intangible assets which are amortized over the estimated useful lives on a straight-line basis. The following table presents the gross carrying amount and accumulated amortization of finite-lived intangible assets as of September 30, 2013 and December 31, 2012 (in thousands):
		30-Sep-13							December 31, 2012
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
		Amount					Amount		Amount					Amount
	Developed technology	$	3,800	$	(1,412	)	$	2,388	$	3,800	$	(700	)	$	3,100
	Customer relationships	2,400		(892		)	1,508		2,400		(441		)	1,959
	Domains/trademarks/tradenames	320		(238		)	82		320		(118		)	202
	Software license rights	1,654		(685		)	969		1,654		(459		)	1,195
	Non-compete agreements	610		(362		)	248		610		(179		)	431
	Total	$	8,784	$	(3,589	)	$	5,195	$	8,784	$	(1,897	)	$	6,887
	Total amortization expense from finite-lived intangible assets was $0.6 million and $1.7 million for the three and nine months ended September 30, 2013, respectively, and $0.6 million and $1.1 million for the three and nine months ended September 30, 2012, respectively. Amortization expense of $0.3 million and $0.9 million for the three and nine months ended September 30, 2013, respectively, and $0.3 million and $0.7 million for the three and nine months ended September 30, 2012, respectively, related to developed technology and software license rights was recorded in cost of revenue and the remainder in “Amortization of certain acquired intangible assets” in the accompanying Consolidated Statements of Operations.
	The following table presents the Company’s estimate of remaining amortization expense for each of the five succeeding fiscal years ending December 31 for finite-lived intangible assets that existed at September 30, 2013 (in thousands):
	2013	$	571
	2014	2,078
	2015	1,840
	2016	554
	2017	145
	Thereafter	7
	Total	$	5,195
	Estimated remaining amortization expense of $0.3 million, $1.2 million, $1.2 million, $0.4 million, and $0.2 million is expected to be recorded in cost of revenue for 2013, 2014, 2015, 2016, and 2017 and thereafter, respectively. The remaining estimated amortization expense will be recorded in amortization of certain acquired intangible assets within operating expenses.
	The Company evaluates the recoverability of its long-lived assets with finite useful lives, including intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amounts may not be recoverable. Based on the assessment of various factors in connection with the preparation of the Company's third quarter financial statements, the Company does not believe there were any negative qualitative factors impacting the recoverability of the carrying values. There were no impairment charges related to identifiable intangible assets in the three and nine months ended September 30, 2013 and the year ended December 31, 2012.

Fair_Value_Of_Financial_Instru

Fair Value Of Financial Instruments	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Of Financial Instruments	'
	FAIR VALUE OF FINANCIAL INSTRUMENTS
	Fair value represents the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Observable inputs are based on market data obtained from independent sources. The fair value hierarchy is based on the following three levels of inputs, of which the first two are considered observable and the last one is considered unobservable:
	•	Level 1 – Quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access at the measurement date.
	•	Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.
	•	Level 3 – Unobservable inputs.
	Assets and liabilities measured at fair value on a recurring basis included the following as of September 30, 2013 and December 31, 2012 (in thousands):
		30-Sep-13								December 31, 2012
		Fair Value		Level 1		Level 2		Level 3		Fair Value		Level 1		Level 2		Level 3
	Cash equivalents	$	69,066	$	69,066	$	—	$	—	$	51,521	$	51,521	$	—	$	—
	Corporate bonds	79,367		—		79,367		—		—		—		—		—
	Agency bonds	121,542		—		121,542		—		—		—		—		—
		$	269,975	$	69,066	$	200,909	$	—	$	51,521	$	51,521	$	—	$	—
	At September 30, 2013 and December 31, 2012, cash equivalents of $69.1 million and $51.5 million, respectively, consisted of money market funds with original maturity dates of three months or less backed by U.S. Treasury bills.
	As of September 30, 2013, corporate and agency bonds were classified within Level 2 of the fair value hierarchy. The bonds were valued using information obtained from pricing services, which obtained quoted market prices from a variety of industry data providers, security master files from large financial institutions, and other third-party sources. The Company performed supplemental analysis to validate information obtained from its pricing services. As of September 30, 2013, no adjustments were made to such pricing information.
	Senior Convertible Notes
	The convertible notes are shown in the accompanying consolidated balance sheets at their original issuance value, net of unamortized discount, and are not marked to market each period. The approximate fair value of our convertible notes as of September 30, 2013 was $302.1 million. The fair value of the convertible notes were estimated on the basis of quoted market prices, which, due to limited trading activity, are considered Level 2 in the fair value hierarchy.

Debt

Debt	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Debt	'
	DEBT
	Senior Convertible Notes
	In June 2013, the Company issued senior convertible notes (the “Notes”) raising gross proceeds of $253.0 million.
	The Notes are governed by an Indenture, dated June 17, 2013 (“Indenture”), between the Company and U.S. Bank National Association, as trustee. The Notes will mature on July 1, 2018, unless earlier repurchased or converted, and bear interest at a rate of 1.50% per year payable semi-annually in arrears on January 1 and July 1 of each year, commencing January 1, 2014.
	The Notes are convertible at an initial conversion rate of 18.5046 shares of common stock per $1,000 principal amount of Notes, which represents an initial conversion price of approximately $54.04 per share, subject to adjustment for anti-dilutive issuances, voluntary increases in the conversion rate and make-whole adjustments upon a fundamental change. A fundamental change includes a change in control, delisting of the Company's stock and a liquidation of the Company. Upon conversion, the Company will deliver cash for the principal amount, and the Company has the right to settle any amounts in excess of the principal in cash or shares.
	Prior to April 1, 2018, the Notes are only convertible upon satisfaction of certain conditions as follows:
	•	during any calendar quarter after September 30, 2013, if the last reported sale price of common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;
	•	during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the Notes for each trading day of that five consecutive trading day period was less than 98% of the product of the last reported sale price of common stock and the conversion rate on each such trading day; or
	•	upon the occurrence of specified corporate events as defined in the Indenture.
	Holders of the Notes may convert their Notes at anytime on or after April 1, 2018, until the close of business on the second scheduled trading day immediately preceding the maturity date.
	The holders of the Notes may require the Company to repurchase all or a portion of their Notes at a cash repurchase price equal to 100% of the principal amount of the Notes being repurchased, plus accrued and unpaid interest, upon a fundamental change and events of default, including non-payment of interest or principal and other obligations under the Indenture.
	In accounting for the Notes at issuance, the Company separated the Notes into debt and equity components pursuant to the accounting standards for convertible debt instruments that may be fully or partially settled in cash upon conversion. The fair value of the debt component was estimated using an interest rate for nonconvertible debt, with terms similar to the Notes, excluding the conversion feature. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The excess of the principal amount of the Notes over the fair value of the debt component was recorded as a debt discount and a corresponding increase in additional paid-in capital. The debt discount is accreted to interest expense over the term of the Notes using the interest method. The amount recorded to additional paid-in capital is not to be remeasured as long as it continues to meet the conditions for equity classification. Upon issuance of the $253.0 million of Notes, the Company recorded $214.3 million to debt and $38.7 million to additional paid-in capital.
	The Company incurred transaction costs of approximately $7.3 million related to the issuance of the Notes. In accounting for these costs, the Company allocated the costs to the debt and equity components in proportion to the allocation of proceeds from the issuance of the Notes to such components. Transaction costs allocated to the debt component of $6.2 million are deferred as an asset and amortized to interest expense over the term of the Notes. The transaction costs allocated to the equity component of $1.1 million were recorded to additional paid-in capital. The transaction costs allocated to the debt component were recorded as deferred offering costs in other noncurrent assets.
	The net carrying amount of the liability component of the Notes as of September 30, 2013 consists of the following (in thousands):
	Principal amount	$	253,000
	Unamortized debt discount	(36,764		)
	Net carrying value	$	216,236
	The following table presents the interest expense recognized related to the Notes for the three and nine months ended September 30, 2013 and 2012 (in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013		2012
	Contractual interest expense at 1.5% per annum	$	949		$	—	$	1,086	$	—
	Amortization of debt issuance costs	274			—		314		—
	Accretion of debt discount	1,707			—		1,953		—
	Total	$	2,930		$	—	$	3,353	$	—
	The net proceeds from the Notes were approximately $246.0 million after payment of the initial purchasers' offering expenses. The Company used approximately $49.5 million of the net proceeds of the Notes offering to pay the cost of the Note Hedges described below, which was partially offset by $23.2 million of the proceeds from the Company's sale of the Warrants also described below.
	Note Hedges
	Concurrent with the issuance of the Notes, the Company entered into note hedges (“Note Hedges”) with certain bank counterparties, with respect to its common stock. The Company paid $49.5 million for the Note Hedges. The Note Hedges cover approximately 4.7 million shares of the Company's common stock at a strike price of $54.04 per share, and are exercisable by the Company upon conversion of the Notes. The Note Hedges will expire upon the maturity of the Notes. The Note Hedges are intended to reduce the potential economic dilution upon conversion of the Notes in the event that the fair value per share of the Company's common stock at the time of exercise is greater than the conversion price of the Notes.
	Warrants
	Separately and concurrently, the Company entered into warrant transactions, whereby it sold warrants to the same bank counterparties as the Note Hedges to acquire up to 4.7 million shares of the Company's common stock at a strike price of $80.06 per share (“Warrants”), subject to anti-dilution adjustments. The Company received proceeds of $23.2 million from the sale of the Warrants. The Warrants expire at various dates during 2018 and 2019. If the fair value per share of the Company's common stock exceeds the strike price of the Warrants, the Warrants will reduce diluted earnings per share to the extent that the calculation does not have an anti-dilutive effect.
	The amounts paid and received for the Note Hedges and the Warrants have been recorded in additional paid-in capital. The fair value of the Note Hedges and the Warrants are not remeasured through earnings each reporting period.
	Silicon Valley Bank
	In November 2012, the Company amended its SVB Credit Facility to allow for additional loan advances up to an aggregate of $5.0 million for the purchase of equipment. In June 2013, concurrent with the issuance of the Notes, the Company repaid its total outstanding borrowings under the SVB Credit Facility in the amount of $3.0 million. The SVB Credit Facility was extinguished upon the June 2013 repayment.
	Other Debt Arrangements
	The Company has other debt arrangements with finance companies to finance the purchase of property and equipment and software. The total amounts outstanding under these arrangements were $1.0 million and $1.4 million as of September 30, 2013 and December 31, 2012, respectively.

Stockholders_Equity_and_StockB

Stockholders' Equity and Stock-Based Awards	9 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Awards	'
	STOCKHOLDERS’ EQUITY AND STOCK-BASED AWARDS
	Stockholders’ Equity
	During the nine months ended September 30, 2013, additional paid-in capital increased by $35.4 million. The increase in additional paid-in capital was from proceeds received from the issuance of Warrants of $23.2 million, recording of the note discount of $38.7 million, exercises of stock options and warrants of $9.2 million, and stock-based compensation of $14.9 million offset by payments for the Note Hedges of $49.5 million and an allocation of the Note issuance costs of $1.1 million to equity.
	Stock-Based Awards
	The following table summarizes the Company’s stock option activity for the nine months ended September 30, 2013 (in thousands, except per share and term information):
		Shares		Weighted-			Weighted-		Aggregate
				Average			Average		Intrinsic
				Exercise			Remaining		Value
				Price			Contractual
							Term
	Outstanding, December 31, 2012	6,610		$	12.49		8.2		$	112,899
	Granted	2,028		42.11
	Exercised	(1,209	)	7.63
	Forfeited	(249	)	25.42
	Outstanding, September 30, 2013	7,180		$	21.22		8.2		$	217,164
		Shares		Weighted-			Weighted-		Aggregate
				Average			Average		Intrinsic
				Exercise			Remaining		Value
				Price			Contractual
							Term
	Exercisable at September 30, 2013	2,847		$	9.84		7.1		$	118,442
	Vested and expected to vest at September 30, 2013	7,070		21.11			8.2		214,568
	Unrecognized compensation expense relating to stock options was $57.1 million at September 30, 2013, which is expected to be recognized over a weighted-average period of 2.7 years.
	The aggregate grant date fair value of stock options granted during the nine months ended September 30, 2013 was $42.5 million.
	Restricted Stock Awards
	In connection with the acquisition of Sonar in 2012, the Company issued 31,164 restricted shares of its common stock, valued at approximately $0.7 million, to certain Sonar shareholders who also became employees of the Company upon the acquisition. The vesting of the restricted shares is subject to continued employment, and the fair value of the restricted shares is being recognized as compensation expense over the 2 year vesting period. As of September 30, 2013, 9,350 of the issued shares were vested.
	Restricted Stock Units
	At September 30, 2013, 535,530 shares of the Company’s common stock subject to unvested restricted stock units were outstanding. Unrecognized compensation expense related to shares of the Company’s common stock subject to unvested restricted stock units was $8.7 million at September 30, 2013, which is expected to be recognized as expense over the weighted-average period of 1.9 years.
	Performance Based Options and Restricted Stock Units
	The Company recognized compensation expense related to performance based awards of $0.1 million and $0.2 million for the three and nine months ended September 30, 2013, respectively. Unrecognized compensation expense related to unvested performance based options and restricted stock units was $0.5 million at September 30, 2013, based on the probable performance target at that date, which is expected to be recognized as expense over the weighted-average period of 2.3 years.
	Stock-Based Compensation
	Stock-based compensation expense related to stock options, restricted stock and restricted stock units is included in the following line items in the accompanying Consolidated Statement of Operations for the three and nine months ended September 30, 2013 and 2012 (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Cost of revenue	$	601		$	294		$	1,501		$	1,305
	Sales and marketing expense	2,911			1,118			6,559			2,244
	Research and development expense	610			258			1,361			598
	General and administrative expense	1,795			1,646			4,842			4,150
	Total	$	5,917		$	3,316		$	14,263		$	8,297

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	The Company’s income tax provision was approximately $0.1 million with an effective income tax rate of 0.9% for the three months ended September 30, 2013. The Company had an insignificant tax benefit for the nine months ended September 30, 2013. This compares to an income tax benefit of $0.3 million and $0.6 million and effective income tax rates of 3.8% and 2.2% for the three and nine months ended September 30, 2012, respectively. The income tax provision is offset by the benefits related to the amortization of deferred tax liabilities assumed in connection with the Sonar acquisition, partially offset by foreign and state income taxes. The Company’s effective tax rate differs from the statutory rate primarily due to the amortization of deferred tax liabilities assumed as part of the Sonar acquisition, the change in the valuation allowance on the Company’s deferred tax assets and foreign income taxes.
	As a result of historical losses in the U.S. and U.K., the Company recorded valuation allowances on the net deferred tax assets of the Company’s U.S. and U.K. deferred tax assets and does not anticipate recording an income tax benefit related to these deferred tax assets. The Company will reassess the realization of deferred tax assets each reporting period and will be able to reduce the valuation allowance to the extent that the financial results of these operations improve and it becomes more likely than not that the deferred tax assets are realizable.
	The Company is subject to U.S. federal income tax, state income tax and various foreign income taxes. The Company is subject to examination for years after 2009 and 2008 for its U.S. federal income tax returns and state income tax returns, respectively. The Company is subject to examination by various foreign jurisdictions for years after 2007. The Internal Revenue Service has selected for examination the U.S. federal income tax return for the year ended December 31, 2011.  The Company does not believe the examination will have a material impact on the Company's financial condition or results of operation. The Company believes it has adequately reserved for its uncertain tax positions; there is no assurance, however, that taxing authorities will not propose adjustments that are more or less than the Company's expected outcome. In addition, the Company does not expect the change in uncertain tax positions to have a material impact on its financial position, results of operations or liquidity.

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	Guarantees and Indemnifications
	The Company has made guarantees and indemnities under which it may be required to make payments to a guaranteed or indemnified party in relation to certain transactions, including revenue transactions in the ordinary course of business. In connection with certain facility leases, the Company has agreed to indemnify its lessors for certain claims arising from the facility or the lease. The Company is obligated to indemnify its directors and officers to the maximum extent permitted under the laws of the State of Delaware. However, the Company has a directors and officers insurance policy that may reduce its exposure in certain circumstances and may enable it to recover a portion of future amounts that may be payable, if any. The duration of the guarantees and indemnities varies and, in many cases, is indefinite but subject to statutes of limitations. To date, the Company has made no payments related to these guarantees and indemnities. The Company estimates the fair value of its indemnification obligations as insignificant based on this history and the Company’s insurance coverage and therefore has not recorded any liability for these guarantees and indemnities in the accompanying consolidated balance sheets.
	Lease Commitments
	During the nine months ended September 30, 2013, the Company amended its Santa Monica office lease to increase its office space. Additional obligations under the amended lease are approximately $0.1 million for 2013, $0.6 million for 2014, $0.7 million for 2015, $0.7 million for 2016, $0.7 million for 2017, and $0.5 million for 2018. The Company has also entered into various other operating lease agreements with obligations of approximately $0.1 million for 2013, $0.4 million for 2014, $0.6 million for 2015, $0.7 million for 2016, and $1.1 million for 2017 and thereafter.
	Other Contractual Obligations
	In June 2013, the Company issued senior convertible notes (the “Notes”) raising gross proceeds of $253.0 million. The Notes are governed by an Indenture, dated June 17, 2013, between the Company and U.S. Bank National Association, as trustee. The Notes will mature on July 1, 2018, unless earlier repurchased or converted, and bear interest at a rate of 1.50% per year payable semi-annually in arrears on January 1 and July 1 of each year, commencing January 1, 2014.
	Litigation
	During 2012, the Company received an unfavorable ruling in arbitration related to an employment matter. Based on this ruling, the Company has estimated the probable loss for this matter, including both the award and estimated plaintiff attorneys' fees, to be approximately $2.3 million and accrued this amount within other current liabilities. The Company determined that insurance recovery for this loss is probable, and has recorded a related receivable in other current assets for this matter. Based on the above, the Company believes this matter will not have a material adverse effect on the Company's business, operating results, cash flows and financial condition.
	The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. If the Company determines that it is probable that a loss has been incurred and the amount is reasonably estimable, the Company will record a liability. Except for the matter described above, the Company has determined that it does not have a potential liability related to any legal proceedings or claims that would individually or in the aggregate materially adversely affect its financial conditions or operating results.

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	SUBSEQUENT EVENTS
	During October and November 2013, the Compensation Committee of the Board of Directors granted stock options to purchase 218,705 shares of the Company's common stock at a weighted-average exercise price of $49.80 per share. The stock options vest over four years. During October and November 2013, the Compensation Committee of the Board of Directors granted 6,000 shares of the Company's common stock subject to restricted stock units which vest annually over four years.
	During October 2013, the Company entered into operating leases with commitments of approximately $0.3 million in 2014, $0.3 million in 2015, $0.3 million in 2016, $0.3 million in 2017, and $0.3 million thereafter.
	During November 2013, the Company amended an agreement with one of its third party service providers, whereby the Company has committed to provide certain dollar amounts of professional service projects related to implementation and other services for clients of the Company. The amendment increased the contractual commitment amount by $4.0 million in 2015.

Organization_And_Summary_Of_Si1

Organization And Summary Of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with (i) United States generally accepted accounting principles (“GAAP”) for interim financial information and (ii) the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, such financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the financial statements include all adjustments (consisting of normal recurring adjustments) considered necessary for the fair statement of the interim periods presented. Results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013, for any other interim period or for any other future year.
	The condensed consolidated balance sheet at December 31, 2012 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP.
	The Company’s significant accounting policies were described in “Note 1. Summary of Significant Accounting Policies” in the Annual Report on Form 10-K for the year ended December 31, 2012. The Company follows the same accounting policies for interim reporting. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and related notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2012.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In February 2013, the Financial Accounting Standards Board (“FASB”) issued a new accounting standards update amending the accounting guidance for the presentation of comprehensive income to improve the reporting of reclassifications out of accumulated other comprehensive income. The amendment requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by significant component. The new standard is effective prospectively for reporting periods beginning after December 15, 2012. The new guidance is not expected to have a significant impact on the Company’s disclosures and does not have an impact on the Company’s results of operations or financial position.
	In March 2013, the FASB issued new accounting guidance clarifying the accounting for the release of cumulative translation adjustment into net income when a company either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning on or after December 15, 2013. The Company does not anticipate that the adoption of this guidance will have a significant impact on its financial position, results of operations or cash flows.

Business_Acquisition_Tables

Business Acquisition (Tables)	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Unaudited Pro Forma Financial Information	'
	The following table reflects the unaudited pro forma consolidated results of operations for the nine months ended September 30, 2012 as if the Sonar acquisition had taken place on January 1, 2011, after giving effect to certain adjustments including the amortization of acquired intangible assets and the associated tax effect and the elimination of the Company’s and Sonar’s non-recurring acquisition-related expenses (in thousands):
		Nine Months Ended
		September 30,
		2013			2012
		Actual			Pro Forma
	Revenue	$	130,273		$	82,491
	Net loss	$	(29,671	)	$	(23,655	)

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Basic and Diluted Loss Per Share Attributable to Common Stockholders	'
	The following table presents our basic and diluted loss per share (in thousands, except per share amounts):
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013				2012			2013			2012
	Net loss	$	(11,054	)		$	(7,627	)	$	(29,671	)	$	(23,973	)
	Weighted-average shares of common stock outstanding	51,544				50,163			51,164			49,755
	Net loss per share – basic and diluted	$	(0.21	)		$	(0.15	)	$	(0.58	)	$	(0.48	)
Anti-Dilutive Shares Excluded from Calculation of Diluted Net Loss Per Share	'
	At September 30, 2013 and 2012, anti-dilutive shares excluded from the calculation of diluted net loss per share were (in thousands):
		September 30,
		2013			2012
	Options to purchase common stock and restricted stock units	7,716			7,059
	Convertible notes	4,682			—
	Common stock warrants	4,682			—
	Shares issued for purchase consideration held in escrow	—			16
	Common stock subject to repurchase right	—			15
	Other restricted common stock	22			31
	Total shares excluded from net loss per share	17,102			7,121

Investments_Investments_Tables

Investments Investments (Tables)	9 Months Ended
	Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'
Marketable Securities [Table Text Block]	'
		30-Sep-13
		Amortized Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
	Money market funds	$	69,066	$	—	$	—		$	69,066
	Corporate bonds	79,288		81		(2		)	79,367
	Agency bonds	121,508		44		(10		)	121,542
		$	269,862	$	125	$	(12	)	$	269,975

Intangible_Assets_Tables

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Gross Carrying Value and Accumulated Amortization of Definite-lived Intangible Assets	'
	The following table presents the gross carrying amount and accumulated amortization of finite-lived intangible assets as of September 30, 2013 and December 31, 2012 (in thousands):
		30-Sep-13							December 31, 2012
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
		Amount					Amount		Amount					Amount
	Developed technology	$	3,800	$	(1,412	)	$	2,388	$	3,800	$	(700	)	$	3,100
	Customer relationships	2,400		(892		)	1,508		2,400		(441		)	1,959
	Domains/trademarks/tradenames	320		(238		)	82		320		(118		)	202
	Software license rights	1,654		(685		)	969		1,654		(459		)	1,195
	Non-compete agreements	610		(362		)	248		610		(179		)	431
	Total	$	8,784	$	(3,589	)	$	5,195	$	8,784	$	(1,897	)	$	6,887
Estimate Amortization Expense for Definite-Lived Intangible Assets	'
	The following table presents the Company’s estimate of remaining amortization expense for each of the five succeeding fiscal years ending December 31 for finite-lived intangible assets that existed at September 30, 2013 (in thousands):
	2013	$	571
	2014	2,078
	2015	1,840
	2016	554
	2017	145
	Thereafter	7
	Total	$	5,195

Fair_Value_Of_Financial_Instru1

Fair Value Of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'
	Assets and liabilities measured at fair value on a recurring basis included the following as of September 30, 2013 and December 31, 2012 (in thousands):
		30-Sep-13								December 31, 2012
		Fair Value		Level 1		Level 2		Level 3		Fair Value		Level 1		Level 2		Level 3
	Cash equivalents	$	69,066	$	69,066	$	—	$	—	$	51,521	$	51,521	$	—	$	—
	Corporate bonds	79,367		—		79,367		—		—		—		—		—
	Agency bonds	121,542		—		121,542		—		—		—		—		—
		$	269,975	$	69,066	$	200,909	$	—	$	51,521	$	51,521	$	—	$	—

Debt_Tables

Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Convertible Debt Costs	'
	The net carrying amount of the liability component of the Notes as of September 30, 2013 consists of the following (in thousands):
	Principal amount	$	253,000
	Unamortized debt discount	(36,764		)
	Net carrying value	$	216,236
Schedule of Debt cost and interest expense recognized	'
	The following table presents the interest expense recognized related to the Notes for the three and nine months ended September 30, 2013 and 2012 (in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013		2012
	Contractual interest expense at 1.5% per annum	$	949		$	—	$	1,086	$	—
	Amortization of debt issuance costs	274			—		314		—
	Accretion of debt discount	1,707			—		1,953		—
	Total	$	2,930		$	—	$	3,353	$	—

Stockholders_Equity_and_StockB1

Stockholders' Equity and Stock-Based Awards (Tables)	9 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of Stock Option Activity	'
	The following table summarizes the Company’s stock option activity for the nine months ended September 30, 2013 (in thousands, except per share and term information):
		Shares		Weighted-			Weighted-		Aggregate
				Average			Average		Intrinsic
				Exercise			Remaining		Value
				Price			Contractual
							Term
	Outstanding, December 31, 2012	6,610		$	12.49		8.2		$	112,899
	Granted	2,028		42.11
	Exercised	(1,209	)	7.63
	Forfeited	(249	)	25.42
	Outstanding, September 30, 2013	7,180		$	21.22		8.2		$	217,164
		Shares		Weighted-			Weighted-		Aggregate
				Average			Average		Intrinsic
				Exercise			Remaining		Value
				Price			Contractual
							Term
	Exercisable at September 30, 2013	2,847		$	9.84		7.1		$	118,442
	Vested and expected to vest at September 30, 2013	7,070		21.11			8.2		214,568
Stock-Based Compensation Expense Related to Stock Options and Restricted Stock Units	'
	Stock-based compensation expense related to stock options, restricted stock and restricted stock units is included in the following line items in the accompanying Consolidated Statement of Operations for the three and nine months ended September 30, 2013 and 2012 (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Cost of revenue	$	601		$	294		$	1,501		$	1,305
	Sales and marketing expense	2,911			1,118			6,559			2,244
	Research and development expense	610			258			1,361			598
	General and administrative expense	1,795			1,646			4,842			4,150
	Total	$	5,917		$	3,316		$	14,263		$	8,297

Recovered_Sheet1

Organization And Summary of Significant Accounting Policies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Date of incorporation	24-May-99
State of incorporation	'Delaware
Principal operation beginning date	'1999-11

Business_Acquisition_Unaudited

Business Acquisition - Unaudited Pro forma Financial Information (Detail) (Sonar Limited [Member], USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Sonar Limited [Member]	'	'
Business Acquisition [Line Items]	'	'
Revenues	$130,273	$82,491
Net loss	($29,671)	($23,655)

Net_Loss_Per_Share_Basic_and_D

Net Loss Per Share - Basic and Diluted Loss Per Share Attributable to Common Stockholders (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Net loss	($11,054)	($7,627)	($29,671)	($23,973)
Weighted-average shares of common stock outstanding (in shares)	51,544	50,163	51,164	49,755
Net loss per share b basic and diluted	($0.21)	($0.15)	($0.58)	($0.48)

Net_Loss_Per_Share_Antidilutiv

Net Loss Per Share - Anti-dilutive Shares Excluded From Calculation of Diluted Net Loss Per Share Attributable to Common Stockholders (Detail)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	17,102	7,121
Options to purchase common stock and restricted stock units	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	7,716	7,059
Convertible notes	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	4,682	0
Common stock warrants	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	4,682	0
Shares issued for purchase consideration held in escrow	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	0	16
Common stock subject to repurchase right	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	0	15
Other restricted common stock	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	22	31

Investments_Investments_Detail

Investments Investments (Details) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'
Available-for-sale Securities, Amortized Cost Basis	$269,862
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	125
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	-12
Available-for-sale Securities	269,975
Money Market Funds [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Available-for-sale Securities, Amortized Cost Basis	69,066
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	0
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	0
Available-for-sale Securities	69,066
Corporate Bond Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Available-for-sale Securities, Amortized Cost Basis	79,288
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	81
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	-2
Available-for-sale Securities	79,367
Agency Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Available-for-sale Securities, Amortized Cost Basis	121,508
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	44
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	-10
Available-for-sale Securities	$121,542

Intangible_Assets_Gross_Carryi

Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Finite-lived Intangible Assets (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$8,784	$8,784
Accumulated Amortization	-3,589	-1,897
Net Carrying Amount	5,195	6,887
Developed technology	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	3,800	3,800
Accumulated Amortization	-1,412	-700
Net Carrying Amount	2,388	3,100
Customer relationships	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	2,400	2,400
Accumulated Amortization	-892	-441
Net Carrying Amount	1,508	1,959
Domains/trademark/tradenames	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	320	320
Accumulated Amortization	-238	-118
Net Carrying Amount	82	202
Software license rights	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	1,654	1,654
Accumulated Amortization	-685	-459
Net Carrying Amount	969	1,195
Non-compete agreements	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	610	610
Accumulated Amortization	-362	-179
Net Carrying Amount	$248	$431

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		6 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2013
	Cost of revenues	Cost of revenues	Cost of revenues	Cost of revenues	Finite-lived Intangible Assets	Finite-lived Intangible Assets	Finite-lived Intangible Assets	Finite-lived Intangible Assets
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'	'	'	'
Amortization expense	$0.30	$0.30	$0.90	$0.70	$0.60	$0.60	$1.10	$1.70

Intangible_Assets_Estimated_Am

Intangible Assets - Estimated Amortization Expense for Definite-Lived Intangible Assets (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Expected Amortization Expense [Line Items]	'	'
2013	$571	'
2014	2,078	'
2015	1,840	'
2016	554	'
2017	145	'
Thereafter	7	'
Net Carrying Amount	5,195	6,887
Cost of revenues	'	'
Expected Amortization Expense [Line Items]	'	'
2013	300	'
2014	1,200	'
2015	1,200	'
2016	400	'
2017	$200	'

Intangible_Assets_Changes_in_C

Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Asset Impairment Charges	$0	$0

Fair_Value_Of_Financial_Instru2

Fair Value Of Financial Instruments - Measurement of Asset and Liabilities at Fair Value on Recurring Basis (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	$269,975	'
Assets, Fair Value Disclosure	269,975	51,521
Fair value measurements, recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	69,066	51,521
Fair value measurements, recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	69,066	51,521
Assets, Fair Value Disclosure	69,066	51,521
Fair value measurements, recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	'	0
Assets, Fair Value Disclosure	200,909	0
Fair value measurements, recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	'	0
Assets, Fair Value Disclosure	0	0
Corporate Bond Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	79,367	'
Corporate Bond Securities [Member] | Fair value measurements, recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	79,367	0
Corporate Bond Securities [Member] | Fair value measurements, recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Corporate Bond Securities [Member] | Fair value measurements, recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	79,367	0
Corporate Bond Securities [Member] | Fair value measurements, recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Agency Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	121,542	'
Agency Securities [Member] | Fair value measurements, recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	121,542	0
Agency Securities [Member] | Fair value measurements, recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Agency Securities [Member] | Fair value measurements, recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	121,542	0
Agency Securities [Member] | Fair value measurements, recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	$0	$0

Recovered_Sheet2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Money market fund value	$69.10	$51.50
Convertible Debt, Fair Value Disclosures	$302.10	'

Fair_Value_Of_Financial_Instru3

Fair Value Of Financial Instruments Fair Value Measurements (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'
Convertible Debt, Fair Value Disclosures	$302.10

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended		1 Months Ended				0 Months Ended	9 Months Ended	0 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Jun. 17, 2013	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Nov. 30, 2012	Sep. 30, 2013	Dec. 31, 2012	Jun. 17, 2013	Sep. 30, 2013	Jun. 17, 2013	Jun. 17, 2013
				Amended SVB Credit Facility	Amended SVB Credit Facility	Other Debt Arrangements	Other Debt Arrangements	Convertible notes	Convertible notes	Prior to April 1, 2018	Prior to April 1, 2018
				Silicon Valley Bank	Silicon Valley Bank					Maximum	Minimum
										Convertible notes	Convertible notes
										trading_day	trading_day
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Debt gross proceeds	'	'	'	'	'	'	'	$253,000,000	'	'	'
Debt interest rate	'	'	'	'	'	'	'	1.50%	'	'	'
Initiate conversion rate (shares)	'	'	'	'	'	'	'	18.5046	'	'	'
Conversion price ($ per share)	$54.04	'	'	'	'	'	'	'	'	'	'
Convertible debt, conversion trigger, minimum number of trading days	'	'	'	'	'	'	'	'	'	20	5
Convertible debt, conversion trigger, consecutive trading days	'	'	'	'	'	'	'	'	'	'30 days	'5 days
Convertible debt, conversion trigger, market price vs conversion price	'	'	'	'	'	'	'	'	'	130.00%	98.00%
Convertible senior notes	'	'	'	'	'	'	'	214,300,000	216,236,000	'	'
Amount recorded in additional paid-in capital for the equity portion of the convertible note	'	'	'	'	'	'	'	38,700,000	-38,700,000	'	'
Transaction costs related to the issuance of the Notes	'	'	'	'	'	'	'	7,300,000	'	'	'
Deferred debt issuance cost	'	'	'	'	'	'	'	6,200,000	'	'	'
Equity issuance cost	'	'	'	'	'	'	'	1,100,000	'	'	'
Net proceeds from the Notes	'	'	'	'	'	'	'	246,000,000	'	'	'
Payment for the Note Hedge	49,537,000	49,537,000	0	'	'	'	'	'	'	'	'
Number of shares covered by the Note Hedge	4.7	'	'	'	'	'	'	'	'	'	'
Number of shares that can be acquired by warrants holders	'	4.7	'	'	'	'	'	'	'	'	'
Warrant strike price per share	'	80.06	'	'	'	'	'	'	'	'	'
Proceeds from warrants issuance	'	23,225,000	0	'	'	'	'	'	'	'	'
Line of credit facility, maximum borrowing capacity	'	'	'	'	5,000,000	'	'	'	'	'	'
Repayments of lines of credit	'	'	'	3,000,000	'	'	'	'	'	'	'
Debt instrument, amount outstanding	'	'	'	'	'	$1,000,000	$1,400,000	'	'	'	'

Debt_Amounts_Recorded_Within_t

Debt - Amounts Recorded Within the Company Financials (Details) (Convertible Debt, USD $)	Sep. 30, 2013	Jun. 17, 2013
In Thousands, unless otherwise specified
Convertible Debt	'	'
Debt Instrument [Line Items]	'	'
Principal amount	$253,000	'
Unamortized debt discount	-36,764	'
Net carrying value	$216,236	$214,300

Debt_Debt_Cost_and_Interest_Ex

Debt - Debt Cost and Interest Expense Recognized (Details) (Convertible Debt, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Convertible Debt	'	'	'	'
Schedule of Debt Cost and Interest Expense Recognized [Line Items]	'	'	'	'
Contractual interest expense at 1.5% per annum	$949	$0	$1,086	$0
Amortization of debt issuance costs	274	0	314	0
Accretion of debt discount	1,707	0	1,953	0
Total	$2,930	$0	$3,353	$0

Stockholders_Equity_and_StockB2

Stockholders' Equity and Stock-Based Awards - Stock Option Activity (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'	'
Outstanding, December 31, 2012	6,610	'	'
Options, Granted	2,028	'	'
Options, Exercised	-1,209	'	'
Options, Forfeited	-249	'	'
Outstanding, September 30, 2013	7,180	6,610	'
Exercisable at September 30, 2013	'	'	2,847
Vested and expected to vest at September 30, 2013	'	'	7,070
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'	'	'
Weighted-Average Exercise Price, Outstanding, December 31, 2012	$12.49	'	'
Weighted-Average Exercise Price, Granted	$42.11	'	'
Weighted-Average Exercise Price, Exercised	$7.63	'	'
Weighted-Average Exercise Price, Forfeited	$25.42	'	'
Weighted-Average Exercise Price, Outstanding, September 30, 2013	$21.22	$12.49	'
Weighted-Average Exercise Price, Exercisable at September 30, 2013	$9.84	'	'
Weighted-Average Exercise Price, Vested and expected to vest at September 30, 2013	$21.11	'	'
Weighted-Average Remaining Contractual Term, Outstanding, December 31, 2012	'8 years 2 months 12 days	'8 years 2 months 12 days	'
Weighted-Average Remaining Contractual Term, Outstanding, September 30, 2013	'8 years 2 months 12 days	'8 years 2 months 12 days	'
Weighted-Average Remaining Contractual Term, Exercisable at September 30, 2013	'7 years 1 month 6 days	'	'
Weighted-Average Remaining Contractual Term, Vested and expected to vest at September 30, 2013	'8 years 2 months 12 days	'	'
Aggregate Intrinsic Value, Outstanding, December 31, 2012	$112,899	'	'
Aggregate Intrinsic Value, Outstanding, September 30, 2013	217,164	112,899	'
Aggregate Intrinsic Value, Exercisable at September 30, 2013	118,442	'	'
Aggregate intrinsic value, vested and expected to vest, exercisable at September 30, 2013	$214,568	'	'

Stockholders_Equity_and_Stock_

Stockholders' Equity and Stock Based Awards - Additional Information (Detail) (USD $)	9 Months Ended				3 Months Ended	9 Months Ended		0 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Jun. 17, 2013	Sep. 30, 2013
		Restricted Stock Units (RSUs)	Restricted Stock [Member]	Restricted Stock [Member]	Performance Shares [Member]	Performance Shares [Member]	Additional paid-in capital	Convertible notes	Convertible notes
			Sonar Limited [Member]	Sonar Limited [Member]
				Restricted Stock Shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'	'	'	'	'
Increase in additional paid in capital	'	'	'	'	'	'	$35,400,000	'	'
Adjustments to additional paid in capital, warrant issued	23,200,000	'	'	'	'	'	'	'	'
Adjustments to additional paid in capital, note discount	'	'	'	'	'	'	'	38,700,000	-38,700,000
Stock options and warrants exercised	9,200,000	'	'	'	'	'	'	'	'
Adjustments to additional paid in capital, share-based compensation	14,900,000	'	'	'	'	'	'	'	'
Adjustments to additional paid in capital, payments for hedge	49,500,000	'	'	'	'	'	'	'	'
Adjustments to additional paid in capital, note issuance costs	1,100,000	'	'	'	'	'	'	'	'
Unrecognized compensation expense relating to stock options	57,100,000	'	'	'	'	'	'	'	'
Unrecognized compensation expense, expected recognition weighted average period	'2 years 8 months 27 days	'1 year 10 months 13 days	'	'	'	'2 years 3 months	'	'	'
Aggregate grant date fair value of stock options granted	42,500,000	'	'	'	'	'	'	'	'
Restricted stock units granted (in shares)	'	'	'	31,164	'	'	'	'	'
Restricted stock units granted (in dollars)	'	'	'	700,000	'	'	'	'	'
Share-based payment award, award vesting period	'	'	'2 years	'	'	'	'	'	'
Share-based Payment Award, shares vested	'	'	9,350	'	'	'	'	'	'
Share of non-vested restricted stock units were outstanding	'	535,530	'	'	'	'	'	'	'
Unrecognized compensation expense related to non-vested restricted stock units	'	8,700,000	'	'	'	'	'	'	'
Allocated Share-based Compensation Expense	'	'	'	'	100,000	200,000	'	'	'
Unrecognized compensation expense related to nonvested performance based options and restricted stock units	'	'	'	'	$500,000	$500,000	'	'	'

Stockholders_Equity_and_StockB3

Stockholders' Equity and Stock-Based Awards - Stock-Based Compensation Expense Related to Stock Options and Restricted Stock Units Accompanying Statement of Operation (Detail) (Stock Options And Restricted Stock Units, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Share based compensation expense	$5,917	$3,316	$14,263	$8,297
Cost of revenue	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Share based compensation expense	601	294	1,501	1,305
Sales and marketing expense	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Share based compensation expense	2,911	1,118	6,559	2,244
Research and development expense	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Share based compensation expense	610	258	1,361	598
General and administrative expense	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Share based compensation expense	$1,795	$1,646	$4,842	$4,150

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Examination [Line Items]	'	'	'	'
Income tax (benefit) expenses	$104	($298)	($31)	($550)
Effective income tax rate	0.90%	3.80%	'	2.20%
Federal income tax returns	'	'	'	'
Income Tax Examination [Line Items]	'	'	'	'
Income tax examination year	'	'	'2009	'
State income tax returns	'	'	'	'
Income Tax Examination [Line Items]	'	'	'	'
Income tax examination year	'	'	'2008	'

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2013	Jun. 17, 2013
In Millions, unless otherwise specified		Building Lease and Other Commitments [Member]	Convertible notes
Long-term Purchase Commitment [Line Items]	'	'	'
2013	$0.10	$0.10	'
2014	0.6	0.4	'
2015	0.7	0.6	'
2016	0.7	0.7	'
2017	0.7	1.1	'
2018	0.5	'	'
Debt gross proceeds	'	'	253
Debt interest rate	'	'	1.50%
Loss contingency accrual, at carrying value	$2.30	'	'

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	9 Months Ended		1 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Oct. 31, 2013	Nov. 05, 2013	Nov. 05, 2013	Nov. 05, 2013
		Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Guarantee Obligations [Member]
			Stock Options	Restricted Stock Units (RSUs)
Subsequent Event [Line Items]	'	'	'	'	'
Common stock options granted (in number of options)	2,028,000	'	218,705	6,000	'
Stock option exercise price per share (in usd per share)	$42.11	'	$49.80	'	'
Vesting period	'	'	'4 years	'4 years	'
Contractual Obligation, Due in Second Year	'	$0.30	'	'	'
Contractual Obligation, Due in Third Year	'	0.3	'	'	4
Contractual Obligation, Due in Fourth Year	'	0.3	'	'	'
Contractual Obligation, Due after Fifth Year	'	0.3	'	'	'
Contractual Obligation, Due after Fifth Year	'	$0.30	'	'	'