Quotient Technology (QUOT) 10-K 19 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 18, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	COUP
Entity Registrant Name	COUPONS.COM INCORPORATED
Entity Central Index Key	1115128
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$1,115,954,278.14
Entity Common Stock, Shares Outstanding		82,717,213

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$201,075	$38,972
Accounts receivable, net of allowance for doubtful accounts of $408 and $332 at December 31, 2014 and 2013, respectively	51,061	42,185
Prefunded coupons cash deposits	740	920
Deferred tax assets	457
Prepaid expenses and other current assets	2,972	3,100
Total current assets	256,305	85,177
Property and equipment, net	25,399	29,942
Intangible assets, net	11,818	1,813
Goodwill	29,277	9,887
Deferred tax assets		195
Other assets	9,008	7,222
Total assets	331,807	134,236
Current liabilities:
Accounts payable	6,358	5,589
Accrued compensation and benefits	14,861	13,721
Other current liabilities	15,790	13,699
Prefunded coupons cash obligations	740	920
Deferred revenues	6,219	6,751
Debt obligations	7,500	7,500
Debt obligations, related party		15,577
Total current liabilities	51,468	63,757
Other non-current liabilities	89	1,046
Deferred rent	738	1,222
Deferred tax liabilities	2,624	195
Total liabilities	54,919	66,220
Commitments and contingencies (Note 14)
Redeemable convertible preferred stock, $0.00001 par value—no shares authorized, issued and outstanding, and aggregate liquidation preference of $0 at December 31, 2014; 50,437,000 shares authorized and 41,529,721 shares issued and outstanding, and aggregate liquidation preference of $282,990 at December 31, 2013		270,262
Stockholders’ equity (deficit):
Preferred stock, $0.00001 par value—10,000,000 shares authorized and no shares issued or outstanding at December 31, 2014; no shares authorized, issued or outstanding at December 31, 2013
Common stock, $0.00001 par value—250,000,000 shares authorized and 86,224,920 shares issued and 81,380,014 outstanding at December 31, 2014; 96,000,000 shares authorized and 25,934,206 shares issued and 21,089,300 outstanding at December 31, 2013	1
Additional paid-in capital	531,018	28,403
Treasury stock, at cost	-61,935	-61,935
Accumulated other comprehensive income (loss)	-1	37
Accumulated deficit	-192,195	-168,751
Total stockholders’ equity (deficit)	276,888	-202,246
Total liabilities, redeemable convertible preferred stock and stockholders’ equity (deficit)	$331,807	$134,236

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$408	$332
Redeemable convertible preferred stock, par value	$0.00	$0.00
Redeemable convertible preferred stock, shares authorized	0	50,437,000
Redeemable convertible preferred stock, shares issued	0	41,529,721
Redeemable convertible preferred stock, shares outstanding	0	41,529,721
Redeemable convertible preferred stock, liquidation preference	$0	$282,990
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	10,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	250,000,000	96,000,000
Common stock, shares issued	86,224,920	25,934,206
Common stock, shares outstanding	81,380,014	21,089,300

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenues	$221,761,000	$167,892,000	$112,127,000
Costs and expenses:
Cost of revenues	86,186,000	52,080,000	41,745,000
Sales and marketing	78,865,000	61,793,000	63,526,000
Research and development	49,583,000	40,102,000	40,236,000
General and administrative	33,392,000	24,232,000	25,999,000
Change in fair value of contingent consideration	-5,741,000
Total costs and expenses	242,285,000	178,207,000	171,506,000
Loss from operations	-20,524,000	-10,315,000	-59,379,000
Interest expense	-922,000	-953,000	-212,000
Other income (expense), net	-72,000	19,000	92,000
Loss before income taxes	-21,518,000	-11,249,000	-59,499,000
Provision for (benefit from) income taxes	1,926,000	0	-265,000
Net loss	($23,444,000)	($11,249,000)	($59,234,000)
Net loss per share attributable to common stockholders, basic and diluted	($0.35)	($0.57)	($3.72)
Weighted-average number of common shares used in computing net loss per share attributable to common stockholders, basic and diluted	67,828	19,626	15,927

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net loss	($23,444)	($11,249)	($59,234)
Other comprehensive income (loss):
Foreign currency translation adjustments	-38	-3	40
Comprehensive loss	($23,482)	($11,252)	($59,194)

CONSOLIDATED_STATEMENTS_OF_RED

CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS EQUITY (DEFICIT) (USD $)	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Redeemable Convertible Preferred Stock
In Thousands, except Share data
Balance at Dec. 31, 2011	($149,639)		$10,564	($61,935)		($98,268)	$270,262
Balance in shares at Dec. 31, 2011		15,258,048		4,844,906			41,529,721
Exercise of employee stock options	2,309		2,309
Exercise of employee stock options, shares	3,205,478	3,205,478
Vesting of early exercised stock options	118		118
Issuance of warrant	456		456
Stock-based compensation	5,568		5,568
Other comprehensive income	40				40
Net loss	-59,234					-59,234
Balance at Dec. 31, 2012	-200,382		19,015	-61,935	40	-157,502	270,262
Balance in shares at Dec. 31, 2012		18,463,526		4,844,906			41,529,721
Exercise of employee stock options	3,661		3,661
Exercise of employee stock options, shares	2,328,229	2,328,229
Vesting of early exercised stock options	48		48
Exercise of warrant	498		498
Exercise of warrant, shares		297,545
Stock-based compensation	5,181		5,181
Other comprehensive income	-3				-3
Net loss	-11,249					-11,249
Balance at Dec. 31, 2013	-202,246		28,403	-61,935	37	-168,751	270,262
Balance in shares at Dec. 31, 2013		21,089,300		4,844,906			41,529,721
Exercise of employee stock options	8,244		8,244
Exercise of employee stock options, shares	3,149,166	3,149,166
Vesting of restricted stock units	1,913,724	1,913,724
Issuance of common stock, stock purchase plan	2,343		2,343
Issuance of common stock, stock purchase plan, shares		172,277
Exercise of warrant	1,610		1,610
Exercise of warrant, shares		400,000
Issuance of common stock, acquisition	10,050		10,050
Issuance of common stock, acquisition, shares		1,000,040
Issuance of common stock from initial public offering, net of offering costs	174,305		174,305
Issuance of common stock, initial public offering, shares		12,075,000
Conversion of preferred stock to common stock	270,262	1	270,261				-270,262
Conversion of preferred stock to common stock, shares		41,580,507					-41,529,721
Stock-based compensation	35,802		35,802
Other comprehensive income	-38				-38
Net loss	-23,444					-23,444
Balance at Dec. 31, 2014	$276,888	$1	$531,018	($61,935)	($1)	($192,195)
Balance in shares at Dec. 31, 2014		81,380,014		4,844,906

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net loss	($23,444)	($11,249)	($59,234)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	14,737	6,859	6,556
Stock-based compensation	35,510	5,181	5,568
Accretion of debt discount	173	228	55
Amortization of debt issuance cost	77	19
Loss on disposal of property and equipment	9	1	75
Allowance for doubtful accounts	136	155	312
Deferred income taxes	1,923		-234
Change in fair value of contingent consideration	-5,741
Changes in operating assets and liabilities:
Accounts receivable	-8,863	-13,129	-10,117
Prepaid expenses and other current assets	-4,086	-3,780	352
Accounts payable and other current liabilities	1,155	-790	5,386
Accrued compensation and benefits	1,104	2,402	2,069
Deferred revenues	-490	-680	2,513
Other	-742	625	145
Net cash provided by (used in) operating activities	11,458	-14,158	-46,554
Cash flows from investing activities:
Purchases of property and equipment	-9,580	-14,474	-11,700
Acquisitions, net of cash acquired	-13,341
Purchases of intangible assets	-111	-11	-1,045
Other			-25
Net cash used in investing activities	-23,032	-14,485	-12,770
Cash flows from financing activities:
Proceeds from issuance of common stock	10,585	3,661	2,309
Proceeds from initial public offering, net of offering costs	176,525
Exercise of warrant	1,610	498
Proceeds from issuance of debt obligation, related party			15,000
Net borrowings under revolving line of credit		7,500
Repayment of debt obligations, related party	-15,000
Principal payments on capital lease obligations	-58	-40	-46
Payment of deferred offering costs		-2,220
Other		-177
Net cash provided by financing activities	173,662	9,222	17,263
Effect of exchange rates on cash and cash equivalents	15	-2	-6
Net increase (decrease) in cash and cash equivalents	162,103	-19,423	-42,067
Cash and cash equivalents at beginning of period	38,972	58,395	100,462
Cash and cash equivalents at end of period	201,075	38,972	58,395
Supplemental disclosures of cash flow information
Cash paid for income taxes			44
Cash paid for interest	1,448	56	11
Supplemental disclosures of noncash investing and financing activities
Vesting of early exercised stock options		48	118
Issuance of warrant			456
Issuance of common stock, acquisition	10,050
Property and equipment acquired under capital leases	97	91
Property and equipment in accounts payable and accrued liabilities	$1,657	$3,298	$9,126

Background

Background	12 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Background	1. Background
	Description of Business
	Coupons.com Incorporated (the “Company”) connects great brands and retailers with consumers by delivering digital promotions and media to consumers. Many brands from leading consumer packaged goods companies (“CPGs”) and many of the leading grocery, drug, dollar channel and mass merchandise retailers use the Company’s digital platform to engage consumers at the critical moments when they are choosing which products they will buy and where they will shop. The Company delivers digital coupons, including coupon codes, and media through its platform.  The Company’s platform includes web, mobile and social channels, as well as those of the Company’s CPGs, retailers and its extensive network of publishers that display the Company’s coupon and media offerings on their websites and mobile applications. Consumers select coupons by either printing them for physical redemption at retailers or saving them to retailer loyalty accounts for automatic digital redemption.
	Initial Public Offering
	In March 2014, the Company completed its initial public offering (“IPO”) in which it issued and sold 12,075,000 shares of common stock at a public offering price of $16.00 per share. The Company received net proceeds of $179.7 million after deducting underwriting discounts and commissions of $13.5 million, but before deducting offering expenses of $5.4 million. Upon the closing of the initial public offering, all of the Company’s outstanding redeemable convertible preferred stock converted into 41,580,507 shares of common stock.  Additionally, the Company recognized stock-based compensation expense of $29.5 million during the year ended December 31, 2014 associated with restricted stock units (“RSUs”). See Note 2 (Summary of Significant Accounting Policies: Stock-based Compensation).

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies
	Basis of Presentation and Consolidation
	The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The Company’s consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated.  Certain prior period balances have been reclassified to conform to the current period's presentation.
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period.  Actual results may differ from the Company’s estimates, and such differences may be material to the accompanying consolidated financial statements.
	Reverse Stock Split
	On February 6, 2014, the Company’s Board approved, and on February 19, 2014 the Company effected, a 2.5-for-1 reverse stock split of its common stock and preferred stock. All share and per share information for all periods presented has been adjusted to reflect the effect of such reverse stock split.
	Cash and Cash Equivalents
	The Company considers all highly liquid investments with original maturities of three months or less at the time of purchase to be cash equivalents.
	Accounts Receivable and Allowance for Doubtful Accounts
	Accounts receivable are recorded at invoiced amounts and do not bear interest. The Company generally does not require collateral and performs ongoing credit evaluations of its customers and maintains allowances for potential credit losses. The Company maintains an allowance for doubtful accounts based upon the expected collectability of its accounts receivable. The allowance is determined based upon specific account identification. The expectation of collectability is based on the Company’s review of credit profiles of customers, contractual terms and conditions, current economic trends, and historical payment experience. When the Company determines that the amounts are uncollectible, the Company writes them off against the allowance for doubtful accounts.
	Prefunded Coupons Cash Deposits and Obligations
	Prefunded coupons cash deposits are funded by certain product manufacturers or agencies in advance of a related couponing program when the Company has contractually accepted the role of providing a coupon clearing service on behalf of those product manufacturers or agencies. Upon receiving a prefunded coupons cash deposit, the Company records the deposit along with a related prefunded coupons cash obligations. When related couponing payouts are made, both the prefunded coupons cash deposits and its prefunded coupons cash obligations are reduced. Any funds remaining from the related couponing program are returned to the advertisers or agencies.
	Property and Equipment, Net
	Property and equipment, net, are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets, which are three years for computer equipment and software and five years for all other asset categories except leasehold improvements, which are amortized over the shorter of the lease term or the expected useful life of the improvements. Equipment leased under capital leases is amortized over the shorter of the lease term or the asset’s estimated useful life.
	Internal-Use Software Development Costs
	Costs incurred for computer software developed or obtained for internal use, the Company begins to capitalize its costs to develop software when preliminary development efforts are successfully completed, management has authorized and committed project funding, and it is probable that the project will be completed and the software will be used as intended. These costs are amortized to cost of revenues over the estimated useful life of the related asset, generally estimated to be three years. Costs incurred prior to meeting these criteria together with costs incurred for training and maintenance are expensed as incurred and recorded in research and development expense on the Company’s consolidated statements of operations.
	Leases
	Leases meeting certain criteria are accounted for as capital leases. The imputed interest is included in interest expense in the accompanying consolidated statements of operations, and the capitalized value is amortized as part of the Company’s property and equipment, net. Obligations under capital leases are reduced by lease payments, net of imputed interest. All other leases are accounted for as operating leases. When an operating lease contains a predetermined fixed escalation of the minimum rent, or if tenant allowances have been received, the related rent expense is recognized on a straight-line basis over the term of the lease, with the difference between the recognized rent expense and amounts payable under the lease recorded as deferred rent liability.
	Business Combinations
	The Company accounts for acquisitions of entities that include inputs and processes and have the ability to create outputs as business combinations. Under the acquisition method of accounting, the total consideration is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the acquisition dates. The excess of the consideration transferred over those fair values is recorded as goodwill. During the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Acquisition related costs are not considered part of the consideration, and are expensed as general and administrative expense as incurred.
	Goodwill and Intangible Assets, Net
	Intangible assets with a finite life are amortized over their estimated useful lives. Goodwill is tested for impairment at least annually, and more frequently upon the occurrence of certain events. The Company completes its annual impairment test during the fourth quarter of each year.  There was no impairment of goodwill for the years ended December 31, 2014, 2013 and 2012.
	Impairment of Long-Lived Assets
	Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is measured first by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, an impairment loss would be recognized when the carrying amount of the asset exceeds the fair value of the asset. The Company has not recognized any impairment of long-lived assets for the years ended December 31, 2014, 2013 and 2012.
	Fair Value of Financial Instruments
	The carrying values of the Company’s financial instruments, including cash equivalents, accounts receivable, prefunded coupons cash deposits, accounts payable, accrued compensation and benefits, other current liabilities and prefunded coupons cash obligations, approximate fair value due to their short-term nature.  Debt obligations are stated at the carrying value as the stated interest rates approximate market rates available to the Company. The Company records money market funds and contingent consideration at fair value. See Note 3 (Fair Value Measurements).
	Revenue Recognition
	The Company derives revenues primarily from the set-up and activation of coupons and coupons codes, and digital media services.
	The Company recognizes revenue when all four of the following criteria are met:
	·	Persuasive evidence of an arrangement exists;
	·	Delivery has occurred or a service has been provided;
	·	Customer fees are fixed or determinable; and
	·	Collection is reasonably assured.
	Coupons - The Company generates revenue, as consumers select, or activate, a coupon through its platform by either printing it for physical redemption at a retailer or saving it to a retailer loyalty account for automatic digital redemption.  In the case of the setup fees, the Company recognizes revenue proportionally, on a per activation basis, using the number of authorized activations per insertion order, commencing on the date of the first coupon activation. For coupons, the pricing is generally determined on a per unit activation basis and includes fees for the creation and setup of the digital coupons.
	Coupon Codes - The Company generates revenue when a consumer makes a purchase using a coupon code from its platform and completion of the order is reported to the Company. In the same period that the Company recognizes revenue for the delivery of coupon codes, the Company also estimates and records a reserve, based upon historical experience, to provide for end-user cancelations or product returns which may not be reported until a subsequent date.
	Digital Media - The Company’s media services enable CPGs and retailers to deliver digital media and advertising to promote their brands and products on the Company’s websites and mobile apps, and through the Company’s affiliate publishers and non-publisher third parties. The Company charges a fee for these media campaigns, the pricing of which is based on the advertisement size and position. Related fees are billed monthly, based on a per impressions or a per click basis.
	The Company does not offer rights of refund of previously paid or delivered amounts, rebates, rights of return or price protection. In all instances, the Company limits the amount of revenue recognized to the amounts for which it have the right to bill its’ customers.
	Gross versus Net Revenue Reporting
	In the normal course of business and through its distribution network, the Company delivers digital coupons and media on retailers’ websites, through retailers’ loyalty programs, and on the websites of digital publishers. In these situations, the Company generally pays a distribution fee to the retailers or publishers which is included in the Company’s cost of revenues. The determination of whether revenues should be reported on a gross or net basis is based on an assessment of whether the Company is acting as the principal or an agent in the transaction. In determining whether the Company is the principal or an agent, the Company follows the accounting guidance for principal-agent considerations. Because the Company is the primary obligor and is responsible for (i) fulfilling the digital coupon and media delivery, (ii) establishing the selling prices for delivery of the digital coupons and media, and (iii) performing all billing and collection activities including retaining credit risk, the Company has concluded that it is the principal in these arrangements and therefore the Company reports revenues and cost of revenues on a gross basis.
	Multiple-element Arrangements
	For arrangements with multiple-deliverables, the Company determines whether each of the individual deliverables qualify as a separate unit of accounting. In order to treat deliverables in a multiple element arrangement as a separate unit of accounting, the deliverable must have standalone value upon delivery.
	The Company allocates the arrangement fee to all the deliverables (separate units of accounting) using the relative selling price method in accordance with the selling price hierarchy, which includes vendor-specific objective evidence (“VSOE”) if available, third-party evidence (“TPE”) if VSOE is not available and best estimate of selling price (“BESP”) if neither VSOE nor TPE is available. VSOE and TPE do currently not exist for any of the Company’s deliverables. Accordingly, for arrangements with multiple deliverables that can be separated into different units of accounting, the Company allocates the arrangement fee to the separate units of accounting based on BESP. The Company determines BESP for deliverables by considering multiple factors, including, but not limited to, prices it charges for similar offerings, market conditions, competitive landscape and pricing practices. The Company limits the amount of allocable arrangement consideration to amounts that are fixed or determinable and that are not contingent on future performance or future deliverables.
	Deferred Revenues
	Deferred revenues consist of coupon setup fees and activation fees that are expected to be recognized upon coupon activations, which generally occurs within the next 12 months.
	Cost of Revenues
	Cost of revenues consist primarily of distribution fees, third-party data center costs, personnel costs and depreciation and amortization expense. Distribution fees consist of payments to partners within the Company’s network for their digital coupon publishing services. Personnel costs include salaries, bonuses, stock-based awards and employee benefits. The personnel costs are primarily attributable to individuals maintaining the Company’s data centers and operations, which initiate, sets up and deliver digital coupon media campaigns. Depreciation and amortization expense includes depreciation of data center equipment and amortization of capitalized internal use software.
	Research and Development Expense
	The Company expenses the cost of research and development as incurred. Research and development expense consists primarily of personnel and related headcount costs and costs of professional services associated with the ongoing development of the Company’s technology.
	Stock-based Compensation
	The Company accounts for stock-based compensation using the fair value method, which requires the Company to measure the stock-based compensation based on the grant-date fair value of the awards and recognize the compensation expense over the requisite service period. The Company recognizes compensation expense net of estimated forfeitures. Equity awards issued to nonemployees are recorded at fair value on their measurement date and are subject to adjustment each period as the awards vest.
	The fair value of RSUs equals the market value of the Company’s common stock on the date of grant.  RSUs granted prior to the Company’s IPO have a contractual term of seven years and vest upon the satisfaction of both a service condition and a liquidity-event condition.  The service condition is satisfied as to 25% of the RSUs on each of the first four anniversaries of the vesting commencement date. The liquidity-event condition is satisfied upon the earlier of (i) six months after the effective date of the IPO or (ii) March 15 of the calendar year following the year in which the IPO was declared effective; and (iii) the time immediately prior to the consummation of a change in control. The vesting condition that was satisfied six months following the Company’s IPO did not affect the expense attribution period for the RSUs for which the service condition has been met as of the date of the Company’s IPO. This six-month period was not a substantive service condition and, accordingly, beginning on the effectiveness of the Company’s IPO in March 2014, the Company recognized a cumulative stock-based compensation expense for the portion of the RSUs that had met the service condition as of the date of the Company’s IPO.  The Company recognized stock-based compensation expense of $29.5 million during the year ended December 31, 2014 associated with RSUs.
	RSUs granted on or after the Company’s IPO have similar terms as the RSUs granted prior to the Company’s IPO, but are not subject to a liquidity-event condition in order to vest, and the compensation expense is recognized on a straight-line basis over the applicable service period.
	Advertising Expense
	Advertising costs are expensed when incurred and are included in sales and marketing expense on the accompanying consolidated statements of operations. The Company incurred $830,000, $1,917,000 and $7,404,000 of advertising costs during the years ended December 31, 2014, 2013 and 2012, respectively. Advertising costs consist primarily of online marketing costs, such as sponsored search, advertising on social networking sites, e-mail marketing campaigns, loyalty programs, and affiliate programs.
	Income Taxes
	The Company accounts for income taxes in accordance with authoritative guidance, which requires the use of the liability method. Under this method, deferred income tax assets and liabilities are determined based upon the difference between the consolidated financial statement carrying amounts and the tax basis of assets and liabilities and are measured using the enacted tax rate expected to apply to taxable income in the years in which the differences are expected to reverse. A valuation allowance is provided when it is more likely than not that the deferred tax assets will not be realized.
	The Company recognizes liabilities for uncertain tax positions based upon a two-step process. To the extent a tax position does not meet a more-likely-than-not level of certainty, no benefit is recognized in the consolidated financial statements. If a position meets the more-likely-than-not level of certainty, it is recognized in the consolidated financial statements at the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The Company accounts for any applicable interest and penalties as a component of income tax expense.
	Foreign Currency
	Foreign currency denominated assets and liabilities of foreign subsidiaries, where the local currency is the functional currency, are translated into U.S. dollars using the exchange rates in effect at the balance sheet dates, and income and expenses are translated using average exchange rates during the period. The resulting foreign currency translation adjustments are recorded in accumulated other comprehensive income (loss).
	Gains and losses from foreign currency transactions are included in other income (expense), net in the accompanying consolidated statements of operations. Foreign currency transaction gains (losses) were immaterial for all the periods presented in the accompanying consolidated financial statements.
	Other Comprehensive Income (Loss)
	Other comprehensive income (loss) consists of foreign currency translation adjustments.
	Net Loss per Share Attributable to Common Stockholders
The Company computes its basic and diluted net loss per share attributable to common stockholders using the two-class method required for companies with participating securities. The Company’s basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, less the weighted average unvested common stock subject to repurchase. The diluted net income per share attributable to common stockholders is computed by giving effect to all potentially dilutive common shares equivalents outstanding during the period. The effects of options to purchase common stock, redeemable convertible preferred stock, RSUs, restricted stock awards (“RSAs”) and common stock warrants are excluded from the computation of diluted net loss per share attributable to common stockholders because their effect is antidilutive.
Segments
The Company’s chief operating decision maker, who is the Chief Executive Officer, reviews the Company’s financial information presented on a consolidated basis for purposes of allocating resources and evaluating our financial performance. There are no segment managers who are held accountable by the chief operating decision maker, or anyone else, for operations, operating results, and planning for levels or components below the consolidated unit level. Accordingly, the Company has determined that it operates in a single reporting segment.
Concentration of Credit Risk
Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. For cash and cash equivalents, the Company is exposed to credit risk in the event of default by the financial institutions to the extent of the amounts recorded on the accompanying consolidated balance sheets. Credit risk with respect to accounts receivable is dispersed due to the large number of customers. The Company does not require collateral for accounts receivable.
Recently Issued Accounting Pronouncements
In August 2014, the FASB issued new guidance related to the disclosures around going concern. The new standard provides guidance around management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company's financial statements.
In May 2014, the FASB amended the existing accounting standards for revenue recognition. The amendments are based on the principle that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company is required to adopt the amendments in the first quarter of 2017. Early adoption is not permitted. The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the impact of these amendments.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	3. Fair Value Measurements
	The fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:
	Level 1—Quoted prices in active markets for identical assets or liabilities.
	Level 2—Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3—Inputs that are generally unobservable and typically reflect management’s estimate of assumptions that market participants would use in pricing the asset or liability.
	The Company’s fair value hierarchy for its financial assets and liabilities that are measured at fair value on a recurring basis are as follows (in thousands):
		31-Dec-14
		Level 1		Level 2				Level 3		Total
	Assets:
	Money market funds (1)	$	14,928	$	—			$	—	$	14,928
	Total	$	14,928	$	—			$	—	$	14,928
	Liabilities:
	Contingent consideration (2)	$	—	$	—			$	1,048	$	1,048
	Total	$	—	$	—			$	1,048	$	1,048
	(1) Included in cash and cash equivalents
	(2) Included in other current liabilities
		31-Dec-13
		Level 1		Level 2				Level 3		Total
	Assets:
	Money market funds (1)	$	14,918	$	—			$	—	$	14,918
	Total	$	14,918	$	—			$	—	$	14,918
	(1) Included in cash and cash equivalents
	The valuation technique used to measure the fair value of money market funds included using quoted prices in active markets for identical assets or liabilities.
	The fair value of contingent consideration was estimated using a Monte Carlo simulation and was based on significant inputs not observable in the market, thus classified as a Level 3 instrument. The inputs include the Company’s stock price, maximum earn-out shares, historical and projected financial results of Eckim, LLC. (“Eckim”), historical volatility of the Company's stock price and risk-free interest rate.  See Note 6 (Acquisitions).
	The following table represents the change in the contingent consideration (in thousands):
						Level 3
	Balance as of December 31, 2013					$	—
	Acquisition date fair value measurement						6,789
	Change in fair value						(5,741	)
	Balance as of December 31, 2014					$	1,048
	For the year ended December 31, 2014, the Company recorded a gain of $5,741,000 due to the change in fair value of the contingent consideration.  The change in fair value of the contingent consideration during the period was primarily driven by the decrease in the likelihood of achieving the revenue and profit milestones.  Gains and losses as a result of the changes in the fair value of the contingent consideration are included as a component of operations in the accompanying consolidated statements of operations.

Allowance_for_Doubtful_Account

Allowance for Doubtful Accounts	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Allowance for Doubtful Accounts	4. Allowance for Doubtful Accounts
	The summary of activities in the allowance for doubtful accounts is as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance at beginning of period	$	332		$	270		$	228
	Bad debt expense		136			155			312
	Recoveries (write-offs), net		(60	)		(93	)		(270	)
	Balance at end of period	$	408		$	332		$	270

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	5. Balance Sheet Components
	Property and Equipment, Net
	Property and equipment consist of the following (in thousands):
		December 31,
		2014			2013
	Computer equipment	$	17,325		$	15,172
	Software		30,791			5,294
	Furniture and fixtures		1,645			1,611
	Leasehold improvements		2,393			2,211
	Total		52,154			24,288
	Accumulated depreciation and amortization		(28,783	)		(17,491	)
	Projects in process		2,028			23,145
	Property and equipment, net	$	25,399		$	29,942
	Depreciation and amortization expense of property and equipment was $12,771,000, $5,923,000 and $5,838,000 for the years ended December 31, 2014, 2013 and 2012, respectively. Total depreciation and amortization expense includes computer and other equipment acquired under capital leases of $80,000, $65,000 and $64,000 for the years ended December 31, 2014, 2013 and 2012, respectively. During the years ended December 31, 2014, 2013 and 2012, the Company disposed of equipment with an original cost of $1,480,000, $127,000 and $183,000, resulting in a loss on disposal of $9,000, $1,000 and $75,000 for the years ended December 31, 2014, 2013 and 2012, respectively.
	In 2012, the Company commenced the development of Retailer iQ. During the years ended December 31, 2014 and 2013, the Company capitalized $3,552,000 and $6,857,000, respectively, of development costs related to the new platform. The Company recognized $7,697,000 of amortization expense in cost of revenues during the year ended December 31, 2014.  During the years ended December 31, 2013 and 2012 there was no amortization expense, as the new software platform was under development.  The unamortized capitalized development and enhancement costs related to the new platform was $19,000,000 and $23,145,000 as of December 31, 2014 and 2013, respectively.
	During the years ended December 31, 2014 and 2013, the Company capitalized $16,000 and $0, respectively, of other capitalized software development costs unrelated to the new point of sale solution. The Company recognized amortization expense of $106,000, $165,000 and $324,000 for the years ended December 31, 2014, 2013 and 2012, respectively. The unamortized other capitalized software development costs was $79,000 and $169,000 as of December 31, 2014 and 2013, respectively.
	Accrued Compensation and Benefits
	Accrued compensation and benefits consist of the following (in thousands):
		December 31,
		2014			2013
	Bonus	$	6,909		$	5,949
	Payroll and related expenses		2,067			1,131
	Commissions		3,458			4,297
	Vacation		2,427			2,344
	Accrued compensation and benefits	$	14,861		$	13,721
	Other Current Liabilities
	Other current liabilities consist of the following (in thousands):
		December 31,
		2014			2013
	Legal and professional fees	$	1,699		$	1,742
	Marketing expenses		3,415			1,492
	Distribution fees		5,805			5,628
	Accrued property and equipment		687			1,252
	Deferred rent		536			453
	Contingent consideration		1,048			—
	Other		2,600			3,132
	Other current liabilities	$	15,790		$	13,699

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	6. Acquisitions
	The Company completed the following business combinations during the year ended December 31, 2014:
	·	On October 10, 2014, the Company entered into an asset purchase agreement with Padopolis, Inc. (“Padopolis”), a digital catalog publishing company.  Total purchase price for Padopolis was $1,700,000 in cash.
	·	On August 4, 2014, the Company entered into an asset purchase agreement with Eckim, a company specializing in search engine performance marketing. The total acquisition consideration of $19,289,000  consisted of $12,500,000 in cash and $6,789,000 in contingent consideration.  The contingent consideration consists of shares of the Company’s common stock.  The contingently issuable shares are contingent on Eckim achieving certain revenue and profit milestones by December 31, 2015. The contingent consideration shares are issuable on or before April 30, 2016 and are also subject to earlier issuance under certain event. The Company estimated the fair value of the contingent consideration using a Monte Carlo simulation.
	·	On January 2, 2014, the Company acquired all the outstanding shares of Yub, Inc. (“Yub”), a company that allows consumers to link digital offers and promotions to payment cards for savings when they use the cards for in-store purchases. The total acquisition consideration of $10,050,000, which consisted of 1,000,040 shares of the Company’s common stock, was based on the fair value of the Company’s common stock of $10.05 per share.
	The acquisitions provide the Company with customer and vendor relationships, developed technologies, domain names, patents and enhanced workforce. The fair values of identifiable intangible assets were determined using discounted cash flow models.  The excess of the consideration paid over the fair value of the net tangible assets and identifiable intangible assets acquired is recorded as goodwill. The goodwill is attributable to expected synergies from combined operations and the acquired companies’ knowhow.
	Assets acquired and liabilities assumed were recorded at their fair values as of the respective acquisition dates. The following table summarizes the consideration paid for each acquisition and the related fair values of the assets acquired and liabilities assumed (in thousands):
		Purchase		Net			Identifiable		Goodwill		Goodwill		-2
		Consideration		Tangible			Intangible				Deductible		Acquisition
				Assets			Assets				for Taxes		Related
				Acquired/									Expenses
				(Liabilities
				Assumed)
	Padopolis	$	1,700	$	—		$	896	$	804	Deductible		$	166
	Eckim		19,289		—			8,636		10,653	(1) Deductible			288
	Yub		10,050		(241	)		2,320		7,971	Not Deductible			376
		$	31,039	$	(241	)	$	11,852	$	19,428			$	830
	(1) Subject to final settlement of the contingent consideration
	(2) Expensed as general and administrative
	The following table sets forth each component of identifiable intangible assets acquired in connection with the acquisitions: (in thousands):
		Padopolis		Eckim			Yub		Total		Estimated
											Useful Life
											(in Years)
	Customer relationships	$	184	$	4,752		$	176	$	5,112		5
	Vendor relationships		—		—			890		890		4
	Developed technologies		596		2,233			692		3,521		5
	Domain names		116		1,651			487		2,254		5
	Patents		—		—			75		75		5
	Total identifiable intangible assets	$	896	$	8,636		$	2,320	$	11,852
	The financial results of the acquired companies are included in the Company’s consolidated statements of operations from their respective acquisition dates and were insignificant to the Company’s operating results. The pro forma impact of these acquisitions on consolidated revenues, income (loss) from operations and net loss was not material.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	7. Goodwill and Intangible Assets
	Goodwill represents the excess of the consideration paid over the fair value of the net tangible and identifiable intangible assets acquired in a business combination.  The changes in the carrying value of goodwill are as follows (in thousands):
		Goodwill
	Balance as of December 31, 2012	$	9,874
	Acquisitions		—
	Foreign currency translation		13
	Balance as of December 31, 2013		9,887
	Acquisitions of Padapolis, Eckim and Yub		19,428
	Foreign currency translation		(38	)
	Balance as of December 31, 2014	$	29,277
	Intangible assets consist of the following (in thousands):
		December 31,			Accumulated			Foreign		December 31,		Weighted
		2014			Amortization			Currency		2014		Average
		Gross						Translation		Net		Amortization
												Period
												(Years)
	Domain names	$	4,968		$	(2,836	)	$	—	$	2,132	4
	Patents		1,050			(570	)		—		480	6
	Customer relationships		7,164			(1,978	)		21		5,207	4
	Vendor relationships		890			(223	)		—		667	3
	Developed technologies		4,117			(834	)		—		3,283	5
	Trade names		167			(121	)		3		49	2
		$	18,356		$	(6,562	)	$	24	$	11,818	4
		December 31,			Accumulated			Foreign		December 31,		Weighted
		2013			Amortization			Currency		2013		Average
		Gross						Translation		Net		Amortization
												Period
												(Years)
	Domain names	$	2,638		$	(2,376	)	$	—	$	262	1
	Patents		900			(470	)		—		430	7
	Customer relationships		2,052			(1,239	)		51		864	3
	Developed technologies		596			(420	)		—		176	3
	Trade names		167			(91	)		5		81	3
		$	6,353		$	(4,596	)	$	56	$	1,813	4
	Amortization expense related to intangible assets subject to amortization was $1,966,000, $936,000 and $718,000 for the years ended December 31, 2014, 2013 and 2012, respectively. Estimated amortization expense related to intangible assets is as follows (in thousands):
		Total
	2015	$	2,974
	2016		2,799
	2017		2,482
	2018		2,244
	2019		1,213
	2020 and beyond		106
	Total estimated amortization expense	$	11,818

Debt_Obligations

Debt Obligations	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt Obligations	8. Debt Obligations
	2013 Credit and Security Agreement
	In September 2013, the Company entered into an agreement with a commercial bank to establish an accounts receivable based revolving line of credit. The maximum amount available for borrowing under the revolving credit facility is the lesser of $25,000,000 (which can be increased to $30,000,000 if certain conditions are met) or an amount equal to 85% of certain eligible accounts, which excludes accounts that are over 60 days outstanding from the original due date. The revolving line of credit has a maturity date of September 30, 2016 and may be repaid and redrawn at any time prior to the maturity date. Interest is charged at a floating interest rate based on the daily three month LIBOR, plus an applicable margin.  In May 2014, the Company entered into an amendment, which revised the applicable margin from 2.75% to 2.00% per annum and the financial reporting intervals from monthly to quarterly reporting.  Interest was 2.375% at December 31, 2014. The Company is also required to pay a commitment fee on the unused portion of the revolving credit facility equal to 0.25% per annum. As of December 31, 2014 and 2013, $7,500,000 was outstanding under the revolving line of credit. The revolving credit facility is secured by substantially all of the Company’s assets, and is subject to certain financial and non-financial covenants, including financial reporting. As of December 31, 2014, the Company was in compliance with the financial and non-financial covenants under the credit and security agreement.
	2012 Note Payable, Related Party
	In October 2012, the Company borrowed $15,000,000 from one of its stockholders by entering into a subordinated note arrangement. The note was subordinated to other senior debt. The note had a stated interest rate of 4.00% per annum, and the principal and accrued interest were due in a lump-sum payment on October 5, 2014. Accrued interest related to the related party debt obligation was included in debt obligations, related party on the accompanying  consolidated balance sheets. The note was repaid in August 2014.
	In connection with the note, the Company issued a warrant to purchase 400,000 shares of Company’s common stock at an exercise price of $4.03 per share.  In February 2014, the warrant to purchase 400,000 shares of common stock was exercised.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	9. Stock-based Compensation
	2013 Equity Incentive Plan
	In October 2013, the Company adopted the 2013 Equity Incentive Plan (the “2013 Plan”), which became effective in March 2014 and serves as the successor to the Company’s 2006 Stock Plan (the “2006 Plan”). Pursuant to the 2013 Plan, 4,000,000 shares of common stock were initially reserved for grant, plus (1) any shares that were reserved and available for issuance under the 2006 Plan at the time the 2013 Plan became effective, and (2) any shares that become available upon forfeiture or repurchase by the Company under the 2006 Plan and 2000 Plan.
	Under the 2013 Plan, the Company may grant stock options, stock appreciation rights, restricted stock and restricted stock units, performance shares and units to employees, directors and consultants.  The shares available will be increased at the beginning of each year by lesser of (i) 4% of outstanding common stock on the last day of the immediately preceding year, or (ii) such number determined by the board of directors.  Under the 2013 Plan, both the ISOs and NSOs are granted at a price per share not less than 100% of the fair market value on the effective date of the grant. The board of directors determines the vesting period for each option award on the grant date, and the options generally expire 10 years from the grant date or such shorter term as may be determined by the board of directors.
	Stock Options
	The fair value of each option was estimated on the date of grant for the periods presented using the following assumptions:
		Year Ended December 31,
		2014				2013				2012
	Expected life (in years)		6.08				6.08				6.08
	Risk-free interest rate	2.33%				1.09% to 1.69%				1.02% to 1.11%
	Volatility		55%			51% to 53%					49%
	Dividend yield	—				—				—
	The weighted-average grant-date fair value of options granted was $8.60, $3.05 and $2.55 per share during the years ended December 31, 2014, 2013 and 2012, respectively.
	Restricted Stock Units
	The fair value of RSUs equals the market value of the Company’s common stock on the date of grant. The RSUs are excluded from issued and outstanding shares until they are vested.
	A summary of the Company’s stock option and RSUs award activity under the Plans is as follows:
						Options Outstanding													RSUs Outstanding
		Shares				Number of				Weighted			Weighted			Aggregate			Number of			Weighted
		Available				Shares				Average			Average			Intrinsic			Shares			Average
		for Grant								Exercise			Remaining			Value						Grant
										Price			Contractual			(in thousands)						Date Fair
													Term (Years)									Value
	Balance as of December 31, 2011		8,735,836				15,376,023			$	2.64			7.21						630,000		$	7.93
	Options granted		(1,339,571	)			1,339,571				5.38
	Options exercised		—				(3,205,478	)			0.72					$	12,117
	Options canceled or expired		1,120,498				(1,136,470	)			5.19
	RSUs granted		(2,295,239	)																2,295,239			5.05
	RSUs canceled or Expired		419,750																	(419,750	)		6.14
	Balance as of December 31, 2012		6,641,274				12,373,646				3.2			6.81			16,550			2,505,489			5.59
	Options granted		(3,709,567	)			3,709,567				12.14
	Options exercised						(2,328,229	)			4.57						9,626
	Options canceled or expired		1,119,277				(1,119,277	)			6.03
	RSUs granted		(2,530,542	)																2,530,542			5.54
	RSUs canceled or Expired		514,840																	(514,840	)		5.33
	Balance as of December 31, 2013		2,035,282				12,635,707				5.87			7.02			68,944			4,521,191			5.59
	Increase in shares authorized		4,000,000
	Options granted		(46,875	)			46,875				16
	Options exercised		—				(3,149,166	)			2.62						33,704
	Options canceled or expired		38,653				(38,653	)			6.2
	RSUs granted		(4,796,559	)																4,796,559			16.49
	RSUs released		—																	(1,913,724	)		5.66
	RSUs canceled or expired		594,611																	(594,611	)		10.12
	Balance as of December 31, 2014		1,825,112				9,494,763				7			6.57			107,913			6,809,415			12.66
	Vested and expected to vest as of						9,046,740				6.73			6.48			104,819
	December 31, 2014
	Vested and exercisable as of						6,769,271				4.76			5.81			89,516
	December 31, 2014
	The aggregate intrinsic value disclosed in the table above is based on the difference between the exercise price of the options and the fair value of the Company’s common stock.
	The aggregate total fair value of shares vested during the years ended December 31, 2014, 2013 and 2012 was $5,749,000, $5,130,000 and $5,739,000, respectively.
	Additional information for options outstanding and exercisable as of December 31, 2014 is as follows:
					Options Outstanding										Options Exercisable
									Weighted Average			Weighted						Weighted
									Remaining			Average						Average
					Number of				Contractual Term			Exercise			Number of			Exercise
	Exercise Prices				Shares				(Years)			Price			Shares			Price
	$  0.14 - $  0.28					1,722,439				3.4		$	0.21			1,722,439		$	0.21
	$  0.37 - $  0.46					65,333				4.67			0.38			65,333			0.38
	$  3.67 - $  5.74					4,332,200				6.43			4.03			3,660,356			3.95
	$  8.64 - $16.26					2,574,791				8.27			11.1			1,104,477			10.82
		$25.00				800,000				8.87			25			216,666			25
						9,494,763										6,769,271
	Employee Stock Purchase Plan
	The Company’s Board of Directors adopted the 2014 Employee Stock Purchase Plan (“ESPP”), which became effective in March 2014, pursuant to which 1,200,000 shares of common stock was reserved for future issuance. In addition, ESPP provides for annual increases in the number of shares available for issuance on the first day of each year equal to the least of (i) 0.5% of the outstanding shares of common stock on the last day of the immediately preceding year, (ii) 400,000 shares or (iii) such other amount as may be determined by the board of directors.  Eligible employees can enroll and elect to contribute up to 15% of their base compensation through payroll withholdings in each offering period, subject to certain limitations. Each offering period is six months in duration, with the exception of the initial offering period which commenced in March 2014 and ended in November 2014. The purchase price of the stock is the lower of 85% of the fair market value on (a) the first day of the offering period or (b) the purchase date.
	The fair value of the option feature is estimated using the Black-Scholes model for the period presented based on the following assumptions:
	Year Ended
	31-Dec-14
Expected life (in years)	0.49  to 0.62
Risk-free interest rate	0.07%  to 0.08%
Volatility	55%  to 70%
Dividend yield	—
172,277 shares of common stock was issued under the ESPP in November 2014.  As of December 31, 2014, 1,027,723 shares are available for issuance under the ESPP.
Stock-based Compensation Expense
The following table sets forth the total stock-based compensation expense resulting from stock options, RSUs ,and ESPP included in the Company’s consolidated statements of operations (in thousands):
	Year Ended December 31,
	2014				2013				2012
Cost of revenues	$	3,086			$	300			$	378
Sales and marketing		9,464				1,492				1,880
Research and development		11,536				1,015				1,532
General and administrative		11,424				2,374				1,778
Total stock-based compensation expense	$	35,510			$	5,181			$	5,568
As of December 31, 2014, there was $61,964,000 unrecognized stock-based compensation expense (net of estimated forfeitures), of which $7,281,000 is related to stock options and ESPP and $54,683,000 is related to RSUs. The total unrecognized stock-based compensation expense related to stock options and ESPP as of December 31, 2014 will be amortized over a weighted-average period of 2.4 years. The total unrecognized stock-based compensation expense related to RSUs as of December 31, 2014 will be amortized over a weighted-average period of 3.2 years.
The amount of stock-based compensation cost capitalized in property and equipment, net on the accompanying consolidated balance sheets was immaterial for all periods presented.

Redeemable_Convertible_Preferr

Redeemable Convertible Preferred Stock	12 Months Ended
	Dec. 31, 2014
Temporary Equity Disclosure [Abstract]
Redeemable Convertible Preferred Stock	10. Redeemable Convertible Preferred Stock
	Immediately prior to the completion of the Company’s IPO in March 2014, all of the Company’s outstanding redeemable convertible preferred stock automatically converted into 41,580,507 shares of common stock, therefore no shares of redeemable convertible preferred stock was outstanding following the closing of the Company’s IPO.
	As the deemed liquidation preference was not solely within the control of the Company, the redeemable convertible preferred stock was presented outside of stockholders’ equity (deficit) on the accompanying consolidated balance sheets.

Stockholders_Equity_Deficit

Stockholders' Equity (Deficit)	12 Months Ended
	Dec. 31, 2014
Stockholders Equity Note [Abstract]
Stockholders' Equity (Deficit)	11. Stockholders’ Equity (Deficit)
	Amended and Restated Certificate of Incorporation
	In March 2014, the Company filed an amended and restated certificate of incorporation, which became effective immediately following the completion of the Company’s IPO. Under the restated certificate of incorporation, the authorized capital stock consists of 250,000,000 shares of common stock and 10,000,000 shares of preferred stock.
	Common Stock. The rights, preferences and privileges of the holders of common stock are subject to the rights of the holders of shares of any series of preferred stock which the Company may issue in the future. Subject to the foregoing, for as long as such stock is outstanding, the holders of common stock are entitled to receive ratably any dividends as may be declared by the board of directors out of funds legally available for dividends. Holders of common stock are entitled to one vote per share on any matter to be voted upon by stockholders. The amended and restated certificate of incorporation establishes a classified board of directors that is divided into three classes with staggered three year terms. Only the directors in one class will be subject to election at each annual meeting of stockholders, with the directors in other classes continuing for the remainder of their three year terms. Upon liquidation, dissolution or winding-up, the assets legally available for distribution to the Company’s stockholders would be distributable ratably among the holders of common stock and any participating preferred stock outstanding at that time, subject to prior satisfaction of all outstanding debt and liabilities and the preferential rights of and the payment of liquidation preferences, if any, on any outstanding shares of preferred stock.
	Preferred Stock. The board of directors is authorized to issue undesignated preferred stock in one or more series without stockholder approval and to determine for each such series of preferred stock the voting powers, designations, preferences, and special rights, qualifications, limitations, or restrictions as permitted by law, in each case without further vote of action by the stockholders. The board of directors can also increase or decrease the number of shares of any series of preferred stock, but not below the number of shares of that series then outstanding, without any further vote or action by the stockholders. The board of directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of common stock.
	Amendment. The amendment of the provisions in the restated certificate requires approval by holders of at least 66 2/3% of the Company’s outstanding capital stock entitled to vote generally in the election of directors.
	Common Stock Subject to Repurchase
	The Company’s equity plan allows certain employees to exercise options prior to vesting. The Company has the right to repurchase any issued but unvested common shares upon termination of service of an employee, at the original purchase price. The consideration received by the Company upon exercise of an unvested option is considered to be a deposit of the exercise price, and the related dollar amount is recorded as a liability. This liability is reclassified to stockholders’ equity (deficit) on a ratable basis as the award vests. During the years ended December 31, 2014 and 2013, $0 and $48,000 of the liability was reclassified to stockholders’ equity (deficit), respectively. The Company had no liability at December 31, 2014 and 2013 related to unvested exercised options.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes
	The components of the Company’s loss before provision for (benefit from) income taxes were as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Domestic	$	(20,753	)	$	(9,972	)	$	(58,101	)
	Foreign		(765	)		(1,277	)		(1,398	)
	Total	$	(21,518	)	$	(11,249	)	$	(59,499	)
	The components of the provision for (benefit from) income taxes are as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	—		$	—		$	—
	State		3			—			(31	)
	Foreign		—			—			—
	Total current income tax expense (benefit)		3			—			(31	)
	Deferred:
	Federal		1,764			—			—
	State		159			—			—
	Foreign		—			—			(234	)
	Total deferred income tax expense (benefit)		1,923			—			(234	)
	Total	$	1,926		$	—		$	(265	)
	A reconciliation of the federal statutory income tax rate to the Company’s effective tax rate is as follows:
		Year Ended December 31,
		2014			2013			2012
	Federal tax		(34.00	%)		(34.00	%)		(34.00	%)
	State income tax, net of federal tax benefit		0.54	%		0.05	%		(0.45	%)
	Valuation allowance, net		36.09	%		18.7	%		31.47	%
	Stock-based compensation		3.1	%		10.12	%		1.44	%
	Foreign income taxes at other than U.S. rates		1.21	%		3.86	%		—
	Other		2.01	%		1.27	%		1.1	%
	Effective tax rate		8.95	%		(0.00	%)		(0.44	%)
	The Company recorded a provision for (benefit from) income taxes of $1,926,000, $0 and ($265,000) for the years ended December 31, 2014, 2013 and 2012, respectively. The provision for income taxes in 2014 was related to the recognition of deferred tax liabilities that arose from the gain the Company recorded as a result of a change in the fair value of contingent consideration from the Eckim acquisition.  The tax benefit from income taxes in 2012 was related to the recognition of the deferred tax liabilities that arose from intangible assets acquired from an acquisition. The state tax tax benefit in 2012 related to certain gross receipt-based state tax payments or refunds required in specific jurisdictions. The difference between the Company’s benefit for income taxes computed at the federal statutory rate and the amounts presented in the accompanying statements of operations is primarily due to the full valuation allowance recorded against deferred tax assets.
	The components of the Company’s deferred tax assets and liabilities are as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Deferred tax assets:
	Credits and net operating loss carryforward	$	57,524		$	58,644
	Accrued compensation		3,441			3,006
	Deferred revenues		113			163
	Stock based compensation		9,420			2,055
	Property and equipment		906			517
	Other deferred tax assets		1,605			854
	Total deferred tax assets		73,009			65,239
	Valuation allowance		(67,450	)		(58,842	)
	Deferred tax liabilities:
	Basis difference on purchased intangible assets		(5,603	)		(6,397	)
	Other deferred tax liabilities		(2,123	)		—
	Total deferred tax liabilities		(7,726	)		(6,397	)
	Net deferred tax assets (liabilities)	$	(2,167	)	$	—
	Other deferred tax assets and liabilities are primarily comprised of the tax effects of accounts receivable reserves, sales allowances and change in fair value of contingent consideration.  As of December 31, 2014 and 2013, the Company had deferred tax assets of $73,009,000 and $65,239,000, respectively. The Company also had deferred tax liabilities of $7,726,000 and $6,397,000 as of December 31, 2014 and 2013, respectively. Realization of the deferred tax assets is dependent upon the generation of future taxable income, if any, the amount and timing of which is uncertain. Based on the available objective evidence, and historical operating performance, management believes that it is more likely than not that the Company’s deferred tax assets are not realizable.  Accordingly, the net deferred tax assets have been fully offset with a valuation allowance. The net valuation allowance increased by approximately $8,608,000 and $3,242,000 for the years ended December 31, 2014 and 2013, respectively.
	As of December 31, 2014, the Company had federal net operating loss carryforwards of approximately $198,576,000, which will begin to expire in 2019.  The Company also had state net operating loss carryforwards of approximately $181,526,000, which will begin to expire in 2016.  Federal net operating loss carryforwards of $54,985,000 and $15,601,000 at December 31, 2014 and 2013, respectively, represent deductions from stock-based compensation for which a benefit would be recorded in additional paid-in capital when it reduces income taxes payable.  As of December 31, 2014, the Company has research credit carryforwards for federal income tax purposes of approximately $397,000 which will begin to expire in the year 2033. The Company also had state net research credit carryforwards for income tax purposes of approximately $416,000 which can be carried forward indefinitely.
	A reconciliation of the gross unrecognized tax benefit is as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Unrecognized tax benefit - beginning balance	$	813		$	285
	Increases for tax positions taken in prior years		553			271
	Increases for tax positions taken in current year		—			257
	Unrecognized tax benefit - ending balance	$	1,366		$	813
	As of December 31, 2014, the Company has $1,366,000 of unrecognized tax benefits. If realized, these unrecognized tax benefits would not impact the Company’s effective tax rate as these tax benefits would be offset by changes in the Company’s valuation allowance. The Company does not believe there will be any material changes in its unrecognized tax benefits over the next twelve months.
	The Company’s policy is to recognize interest and penalties related to income tax matters in income tax expense. As of December 31, 2014 and 2013, the Company had no accrued interest or penalties related to uncertain tax positions. Due to the Company’s historical loss position, all tax years from inception through December 31, 2014 remain open due to unutilized net operating losses.
	Utilization of the net operating loss carryforwards and credits may be subject to a substantial annual limitation due to the ownership change limitations provided by the Internal Revenue Code of 1986, as amended, and similar state provisions. The annual limitation may result in the expiration of net operating losses and credits before their utilization.

Net_Income_Loss_per_Share

Net Income (Loss) per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Loss per Share	13. Net Income (Loss) per Share
	Net Loss per Share Attributable to Common Stockholders
	The computation of the Company’s basic and diluted net loss per share attributable to common stockholders is as follows (in thousands, except per share data):
		Year Ended December 31,
		2014			2013			2012
	Net loss	$	(23,444	)	$	(11,249	)	$	(59,234	)
	Weighted-average number of common shares used in computing net loss per		67,828			19,626			15,927
	share attributable to common stockholders, basic and diluted
	Net loss per share attributable to common stockholders, basic and diluted	$	(0.35	)	$	(0.57	)	$	(3.72	)
	The outstanding common equivalent shares excluded from the computation of the diluted net loss per share attributable to common stockholders for the periods presented because including them would have been antidilutive are as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Redeemable convertible preferred stock		—			41,581			41,581
	Stock options and ESPP		9,587			11,938			15,505
	Restricted stock awards		—			—			—
	Restricted stock units		6,809			3,680			2,108
	Warrants		—			544			393
			16,396			57,743			59,587

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. Commitments and Contingencies
	Leases
	The Company leases office space under noncancelable operating leases with lease terms ranging from one to five years. Additionally, the Company leases certain equipment under noncancelable operating leases at its facilities and its leased data center operations.
	Rent expense was $2,736,000, $2,658,000 and $2,421,000 for the years ended December 31, 2014, 2013 and 2012, respectively.
	Aggregate Future Contractual Obligations and Lease Commitments
	As of December 31, 2014, the Company’s unconditional purchase commitments and minimum payments under its noncancelable operating and capital leases are as follows (in thousands):
		Operating Leases		Capital Leases
	2015	$	3,525	$	68
	2016		3,352		52
	2017		172		22
	2018		126		18
	2019		109		1
	2020 and thereafter		—		—
	Total minimum payments	$	7,284	$	161
	Less: Amount representing interest				11
	Present value of capital lease obligations				150
	Less: Current portion				62
	Capital lease obligation, net of current portion			$	88
	Other Future Commitments
	The Company has long-term commitments for the years 2015 to 2034 in the amount of $7,520,000 for marketing arrangements.
	The Company entered into service agreements under which the Company is obligated to prepay non-refundable payments up to $19,250,000 over three years or earlier upon achievement of certain milestones. As of December 31, 2014, the Company made payments of $8,850,000.  The prepayments will be recognized as cost of revenues over the related service period. The unamortized balance are included in other assets on the accompanying consolidated balance sheets.
	Indemnification
	In the normal course of business, to facilitate transactions related to the Company’s operations, the Company indemnifies certain parties, including CPGs, advertising agencies and other third parties. The Company has agreed to hold certain parties harmless against losses arising from claims of intellectual property infringement or other liabilities relating to or arising from our products, services or other contractual infringement. The term of these indemnity provisions generally survive termination or expiration of the applicable agreement. To date, the Company has not recorded any liabilities related to these agreements.
	Litigation
	In the ordinary course of business, the Company may be involved in lawsuits, claims, investigations, and proceedings consisting of intellectual property, commercial, employment, and other matters. The Company will record a provision for these claims when it is both probable that a liability has been incurred and the amount of the loss, or a range of the potential loss, can be reasonably estimated. These provisions are reviewed regularly and adjusted to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel, and other information or events pertaining to a particular case. In the event that one or more of these matters were to result in a claim against the Company, an adverse outcome, including a judgment or settlement, may cause a material adverse effect on the Company’s future business, operating results, or financial condition.
	The Company believes that liabilities associated with any claims are not probable and any reasonably possible range of losses cannot be estimated at this time, therefore the Company has not recorded any accrual for claims as of December 31, 2014 and 2013.

Employee_Benefit_Plan

Employee Benefit Plan	12 Months Ended
	Dec. 31, 2014
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]
Employee Benefit Plans	15. Employee Benefit Plan
	The Company maintains a defined-contribution plan that is intended to qualify under Section 401(k) of the Internal Revenue Code. The 401(k) plan provides retirement benefits for eligible employees. Eligible employees may elect to contribute to the 401(k) plan. The Company provides a match of up to the lesser of 3% of each employee’s annual salary or $6,000, which vests fully after four years of continuous employment. The Company’s matching contribution expense was $1,466,000, $1,312,000 and $1,287,000 for the years ended December 31, 2014, 2013 and 2012, respectively.

Concentration

Concentration	12 Months Ended
	Dec. 31, 2014
Risks And Uncertainties [Abstract]
Concentration	16. Concentrations
	Customers with an accounts receivable balance of 10% or greater of the total accounts receivable are as follows:
		December 31,
		2014			2013
	Customer A		19	%		11	%
	Customers with 10% or more of revenues during the periods presented are as follows:
		December 31,
		2014			2013		2012
	Customer A		14	%	*		*
	* Less than 10%

Information_About_Geographic_A

Information About Geographic Areas	12 Months Ended
	Dec. 31, 2014
Segments Geographical Areas [Abstract]
Information About Geographic Areas	17. Information About Geographic Areas
	Revenues generated outside of the United States were insignificant for all periods presented. Additionally, as the Company’s assets are primarily located in the United States, information regarding geographical location is not presented, as such amounts are immaterial to these consolidated financial statements taken as a whole.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	18. Subsequent Events
	Stock Repurchase Program
	In February 2015, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock through February 2016.
	Class Action Lawsuit
	On March 11, 2015, a purported class action lawsuit alleging violations of federal securities laws was filed in the Superior Court of the State of California, naming us as defendants and certain of our executive officers and directors. Plaintiffs also name as defendants the underwriters in our initial public offering. The plaintiffs generally allege that our registration statements related to our initial public offering contained material misstatements and omissions. The plaintiffs seek unspecified monetary damages and other relief. We intend to file a motion to dismiss the complaint.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation
	The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The Company’s consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated.  Certain prior period balances have been reclassified to conform to the current period's presentation.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period.  Actual results may differ from the Company’s estimates, and such differences may be material to the accompanying consolidated financial statements.
Reverse Stock Split	Reverse Stock Split
	On February 6, 2014, the Company’s Board approved, and on February 19, 2014 the Company effected, a 2.5-for-1 reverse stock split of its common stock and preferred stock. All share and per share information for all periods presented has been adjusted to reflect the effect of such reverse stock split.
Cash and Cash Equivalents	Cash and Cash Equivalents
	The Company considers all highly liquid investments with original maturities of three months or less at the time of purchase to be cash equivalents.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts
	Accounts receivable are recorded at invoiced amounts and do not bear interest. The Company generally does not require collateral and performs ongoing credit evaluations of its customers and maintains allowances for potential credit losses. The Company maintains an allowance for doubtful accounts based upon the expected collectability of its accounts receivable. The allowance is determined based upon specific account identification. The expectation of collectability is based on the Company’s review of credit profiles of customers, contractual terms and conditions, current economic trends, and historical payment experience. When the Company determines that the amounts are uncollectible, the Company writes them off against the allowance for doubtful accounts.
Prefunded Coupons Cash Deposits and Obligations	Prefunded Coupons Cash Deposits and Obligations
	Prefunded coupons cash deposits are funded by certain product manufacturers or agencies in advance of a related couponing program when the Company has contractually accepted the role of providing a coupon clearing service on behalf of those product manufacturers or agencies. Upon receiving a prefunded coupons cash deposit, the Company records the deposit along with a related prefunded coupons cash obligations. When related couponing payouts are made, both the prefunded coupons cash deposits and its prefunded coupons cash obligations are reduced. Any funds remaining from the related couponing program are returned to the advertisers or agencies.
Property and Equipment, Net	Property and Equipment, Net
	Property and equipment, net, are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets, which are three years for computer equipment and software and five years for all other asset categories except leasehold improvements, which are amortized over the shorter of the lease term or the expected useful life of the improvements. Equipment leased under capital leases is amortized over the shorter of the lease term or the asset’s estimated useful life.
Internal-Use Software Development Costs	Internal-Use Software Development Costs
	Costs incurred for computer software developed or obtained for internal use, the Company begins to capitalize its costs to develop software when preliminary development efforts are successfully completed, management has authorized and committed project funding, and it is probable that the project will be completed and the software will be used as intended. These costs are amortized to cost of revenues over the estimated useful life of the related asset, generally estimated to be three years. Costs incurred prior to meeting these criteria together with costs incurred for training and maintenance are expensed as incurred and recorded in research and development expense on the Company’s consolidated statements of operations.
Leases	Leases
	Leases meeting certain criteria are accounted for as capital leases. The imputed interest is included in interest expense in the accompanying consolidated statements of operations, and the capitalized value is amortized as part of the Company’s property and equipment, net. Obligations under capital leases are reduced by lease payments, net of imputed interest. All other leases are accounted for as operating leases. When an operating lease contains a predetermined fixed escalation of the minimum rent, or if tenant allowances have been received, the related rent expense is recognized on a straight-line basis over the term of the lease, with the difference between the recognized rent expense and amounts payable under the lease recorded as deferred rent liability.
Business Combinations	Business Combinations
	The Company accounts for acquisitions of entities that include inputs and processes and have the ability to create outputs as business combinations. Under the acquisition method of accounting, the total consideration is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the acquisition dates. The excess of the consideration transferred over those fair values is recorded as goodwill. During the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Acquisition related costs are not considered part of the consideration, and are expensed as general and administrative expense as incurred.
Goodwill and Intangible Assets, Net	Goodwill and Intangible Assets, Net
	Intangible assets with a finite life are amortized over their estimated useful lives. Goodwill is tested for impairment at least annually, and more frequently upon the occurrence of certain events. The Company completes its annual impairment test during the fourth quarter of each year.  There was no impairment of goodwill for the years ended December 31, 2014, 2013 and 2012.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets
	Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is measured first by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, an impairment loss would be recognized when the carrying amount of the asset exceeds the fair value of the asset. The Company has not recognized any impairment of long-lived assets for the years ended December 31, 2014, 2013 and 2012.
Fair Value of Financial Instruments	Fair Value of Financial Instruments
	The carrying values of the Company’s financial instruments, including cash equivalents, accounts receivable, prefunded coupons cash deposits, accounts payable, accrued compensation and benefits, other current liabilities and prefunded coupons cash obligations, approximate fair value due to their short-term nature.  Debt obligations are stated at the carrying value as the stated interest rates approximate market rates available to the Company. The Company records money market funds and contingent consideration at fair value. See Note 3 (Fair Value Measurements).
Revenue Recognition	Revenue Recognition
	The Company derives revenues primarily from the set-up and activation of coupons and coupons codes, and digital media services.
	The Company recognizes revenue when all four of the following criteria are met:
	—	Persuasive evidence of an arrangement exists;
	—	Delivery has occurred or a service has been provided;
	—	Customer fees are fixed or determinable; and
	—	Collection is reasonably assured.
	Coupons - The Company generates revenue, as consumers select, or activate, a coupon through its platform by either printing it for physical redemption at a retailer or saving it to a retailer loyalty account for automatic digital redemption.  In the case of the setup fees, the Company recognizes revenue proportionally, on a per activation basis, using the number of authorized activations per insertion order, commencing on the date of the first coupon activation. For coupons, the pricing is generally determined on a per unit activation basis and includes fees for the creation and setup of the digital coupons.
	Coupon Codes - The Company generates revenue when a consumer makes a purchase using a coupon code from its platform and completion of the order is reported to the Company. In the same period that the Company recognizes revenue for the delivery of coupon codes, the Company also estimates and records a reserve, based upon historical experience, to provide for end-user cancelations or product returns which may not be reported until a subsequent date.
	Digital Media - The Company’s media services enable CPGs and retailers to deliver digital media and advertising to promote their brands and products on the Company’s websites and mobile apps, and through the Company’s affiliate publishers and non-publisher third parties. The Company charges a fee for these media campaigns, the pricing of which is based on the advertisement size and position. Related fees are billed monthly, based on a per impressions or a per click basis.
	The Company does not offer rights of refund of previously paid or delivered amounts, rebates, rights of return or price protection. In all instances, the Company limits the amount of revenue recognized to the amounts for which it have the right to bill its’ customers.
Gross versus Net Revenue Reporting	Gross versus Net Revenue Reporting
	In the normal course of business and through its distribution network, the Company delivers digital coupons and media on retailers’ websites, through retailers’ loyalty programs, and on the websites of digital publishers. In these situations, the Company generally pays a distribution fee to the retailers or publishers which is included in the Company’s cost of revenues. The determination of whether revenues should be reported on a gross or net basis is based on an assessment of whether the Company is acting as the principal or an agent in the transaction. In determining whether the Company is the principal or an agent, the Company follows the accounting guidance for principal-agent considerations. Because the Company is the primary obligor and is responsible for (i) fulfilling the digital coupon and media delivery, (ii) establishing the selling prices for delivery of the digital coupons and media, and (iii) performing all billing and collection activities including retaining credit risk, the Company has concluded that it is the principal in these arrangements and therefore the Company reports revenues and cost of revenues on a gross basis.
Multiple-element Arrangements	Multiple-element Arrangements
	For arrangements with multiple-deliverables, the Company determines whether each of the individual deliverables qualify as a separate unit of accounting. In order to treat deliverables in a multiple element arrangement as a separate unit of accounting, the deliverable must have standalone value upon delivery.
	The Company allocates the arrangement fee to all the deliverables (separate units of accounting) using the relative selling price method in accordance with the selling price hierarchy, which includes vendor-specific objective evidence (“VSOE”) if available, third-party evidence (“TPE”) if VSOE is not available and best estimate of selling price (“BESP”) if neither VSOE nor TPE is available. VSOE and TPE do currently not exist for any of the Company’s deliverables. Accordingly, for arrangements with multiple deliverables that can be separated into different units of accounting, the Company allocates the arrangement fee to the separate units of accounting based on BESP. The Company determines BESP for deliverables by considering multiple factors, including, but not limited to, prices it charges for similar offerings, market conditions, competitive landscape and pricing practices. The Company limits the amount of allocable arrangement consideration to amounts that are fixed or determinable and that are not contingent on future performance or future deliverables.
Deferred Revenues	Deferred Revenues
	Deferred revenues consist of coupon setup fees and activation fees that are expected to be recognized upon coupon activations, which generally occurs within the next 12 months.
Cost of Revenues	Cost of Revenues
	Cost of revenues consist primarily of distribution fees, third-party data center costs, personnel costs and depreciation and amortization expense. Distribution fees consist of payments to partners within the Company’s network for their digital coupon publishing services. Personnel costs include salaries, bonuses, stock-based awards and employee benefits. The personnel costs are primarily attributable to individuals maintaining the Company’s data centers and operations, which initiate, sets up and deliver digital coupon media campaigns. Depreciation and amortization expense includes depreciation of data center equipment and amortization of capitalized internal use software.
Research and Development Expense	Research and Development Expense
	The Company expenses the cost of research and development as incurred. Research and development expense consists primarily of personnel and related headcount costs and costs of professional services associated with the ongoing development of the Company’s technology.
Stock-based Compensation	Stock-based Compensation
	The Company accounts for stock-based compensation using the fair value method, which requires the Company to measure the stock-based compensation based on the grant-date fair value of the awards and recognize the compensation expense over the requisite service period. The Company recognizes compensation expense net of estimated forfeitures. Equity awards issued to nonemployees are recorded at fair value on their measurement date and are subject to adjustment each period as the awards vest.
	The fair value of RSUs equals the market value of the Company’s common stock on the date of grant.  RSUs granted prior to the Company’s IPO have a contractual term of seven years and vest upon the satisfaction of both a service condition and a liquidity-event condition.  The service condition is satisfied as to 25% of the RSUs on each of the first four anniversaries of the vesting commencement date. The liquidity-event condition is satisfied upon the earlier of (i) six months after the effective date of the IPO or (ii) March 15 of the calendar year following the year in which the IPO was declared effective; and (iii) the time immediately prior to the consummation of a change in control. The vesting condition that was satisfied six months following the Company’s IPO did not affect the expense attribution period for the RSUs for which the service condition has been met as of the date of the Company’s IPO. This six-month period was not a substantive service condition and, accordingly, beginning on the effectiveness of the Company’s IPO in March 2014, the Company recognized a cumulative stock-based compensation expense for the portion of the RSUs that had met the service condition as of the date of the Company’s IPO.  The Company recognized stock-based compensation expense of $29.5 million during the year ended December 31, 2014 associated with RSUs.
	RSUs granted on or after the Company’s IPO have similar terms as the RSUs granted prior to the Company’s IPO, but are not subject to a liquidity-event condition in order to vest, and the compensation expense is recognized on a straight-line basis over the applicable service period.
Advertising Expense	Advertising Expense
	Advertising costs are expensed when incurred and are included in sales and marketing expense on the accompanying consolidated statements of operations. The Company incurred $830,000, $1,917,000 and $7,404,000 of advertising costs during the years ended December 31, 2014, 2013 and 2012, respectively. Advertising costs consist primarily of online marketing costs, such as sponsored search, advertising on social networking sites, e-mail marketing campaigns, loyalty programs, and affiliate programs.
Income Taxes	Income Taxes
	The Company accounts for income taxes in accordance with authoritative guidance, which requires the use of the liability method. Under this method, deferred income tax assets and liabilities are determined based upon the difference between the consolidated financial statement carrying amounts and the tax basis of assets and liabilities and are measured using the enacted tax rate expected to apply to taxable income in the years in which the differences are expected to reverse. A valuation allowance is provided when it is more likely than not that the deferred tax assets will not be realized.
	The Company recognizes liabilities for uncertain tax positions based upon a two-step process. To the extent a tax position does not meet a more-likely-than-not level of certainty, no benefit is recognized in the consolidated financial statements. If a position meets the more-likely-than-not level of certainty, it is recognized in the consolidated financial statements at the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The Company accounts for any applicable interest and penalties as a component of income tax expense.
Foreign Currency	Foreign Currency
	Foreign currency denominated assets and liabilities of foreign subsidiaries, where the local currency is the functional currency, are translated into U.S. dollars using the exchange rates in effect at the balance sheet dates, and income and expenses are translated using average exchange rates during the period. The resulting foreign currency translation adjustments are recorded in accumulated other comprehensive income (loss).
	Gains and losses from foreign currency transactions are included in other income (expense), net in the accompanying consolidated statements of operations. Foreign currency transaction gains (losses) were immaterial for all the periods presented in the accompanying consolidated financial statements.
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss)
	Other comprehensive income (loss) consists of foreign currency translation adjustments.
Net Loss per Share Attributable to Common Stockholders	Net Loss per Share Attributable to Common Stockholders
	The Company computes its basic and diluted net loss per share attributable to common stockholders using the two-class method required for companies with participating securities. The Company’s basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, less the weighted average unvested common stock subject to repurchase. The diluted net income per share attributable to common stockholders is computed by giving effect to all potentially dilutive common shares equivalents outstanding during the period. The effects of options to purchase common stock, redeemable convertible preferred stock, RSUs, restricted stock awards (“RSAs”) and common stock warrants are excluded from the computation of diluted net loss per share attributable to common stockholders because their effect is antidilutive.
Segments	Segments
	The Company’s chief operating decision maker, who is the Chief Executive Officer, reviews the Company’s financial information presented on a consolidated basis for purposes of allocating resources and evaluating our financial performance. There are no segment managers who are held accountable by the chief operating decision maker, or anyone else, for operations, operating results, and planning for levels or components below the consolidated unit level. Accordingly, the Company has determined that it operates in a single reporting segment.
Concentration of Credit Risk	Concentration of Credit Risk
	Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. For cash and cash equivalents, the Company is exposed to credit risk in the event of default by the financial institutions to the extent of the amounts recorded on the accompanying consolidated balance sheets. Credit risk with respect to accounts receivable is dispersed due to the large number of customers. The Company does not require collateral for accounts receivable.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements
	In August 2014, the FASB issued new guidance related to the disclosures around going concern. The new standard provides guidance around management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company's financial statements.
	In May 2014, the FASB amended the existing accounting standards for revenue recognition. The amendments are based on the principle that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company is required to adopt the amendments in the first quarter of 2017. Early adoption is not permitted. The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the impact of these amendments.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Financial Assets Measured at Fair Value on Recurring Basis	The Company’s fair value hierarchy for its financial assets and liabilities that are measured at fair value on a recurring basis are as follows (in thousands):
		31-Dec-14
		Level 1		Level 2				Level 3		Total
	Assets:
	Money market funds (1)	$	14,928	$	—			$	—	$	14,928
	Total	$	14,928	$	—			$	—	$	14,928
	Liabilities:
	Contingent consideration (2)	$	—	$	—			$	1,048	$	1,048
	Total	$	—	$	—			$	1,048	$	1,048
	(1) Included in cash and cash equivalents
	(2) Included in other current liabilities
		31-Dec-13
		Level 1		Level 2				Level 3		Total
	Assets:
	Money market funds (1)	$	14,918	$	—			$	—	$	14,918
	Total	$	14,918	$	—			$	—	$	14,918
	(1) Included in cash and cash equivalents
Summary of Changes in Contingent Consideration	The following table represents the change in the contingent consideration (in thousands):
						Level 3
	Balance as of December 31, 2013					$	—
	Acquisition date fair value measurement						6,789
	Change in fair value						(5,741	)
	Balance as of December 31, 2014					$	1,048

Allowance_for_Doubtful_Account1

Allowance for Doubtful Accounts (Tables)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Summary of Activity in Allowance for Doubtful Accounts	The summary of activities in the allowance for doubtful accounts is as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance at beginning of period	$	332		$	270		$	228
	Bad debt expense		136			155			312
	Recoveries (write-offs), net		(60	)		(93	)		(270	)
	Balance at end of period	$	408		$	332		$	270

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Property and Equipment, Net	Property and equipment consist of the following (in thousands):
		December 31,
		2014			2013
	Computer equipment	$	17,325		$	15,172
	Software		30,791			5,294
	Furniture and fixtures		1,645			1,611
	Leasehold improvements		2,393			2,211
	Total		52,154			24,288
	Accumulated depreciation and amortization		(28,783	)		(17,491	)
	Projects in process		2,028			23,145
	Property and equipment, net	$	25,399		$	29,942
Accrued Compensation and Benefits	Accrued compensation and benefits consist of the following (in thousands):
		December 31,
		2014			2013
	Bonus	$	6,909		$	5,949
	Payroll and related expenses		2,067			1,131
	Commissions		3,458			4,297
	Vacation		2,427			2,344
	Accrued compensation and benefits	$	14,861		$	13,721
Other Current Liabilities	Other current liabilities consist of the following (in thousands):
		December 31,
		2014			2013
	Legal and professional fees	$	1,699		$	1,742
	Marketing expenses		3,415			1,492
	Distribution fees		5,805			5,628
	Accrued property and equipment		687			1,252
	Deferred rent		536			453
	Contingent consideration		1,048			—
	Other		2,600			3,132
	Other current liabilities	$	15,790		$	13,699

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Schedule of Consideration Paid for Each Acquisition and the Related Fair Values of Assets Acquired and Liabilities Assumed	Assets acquired and liabilities assumed were recorded at their fair values as of the respective acquisition dates. The following table summarizes the consideration paid for each acquisition and the related fair values of the assets acquired and liabilities assumed (in thousands):
		Purchase		Net			Identifiable		Goodwill		Goodwill		-2
		Consideration		Tangible			Intangible				Deductible		Acquisition
				Assets			Assets				for Taxes		Related
				Acquired/									Expenses
				(Liabilities
				Assumed)
	Padopolis	$	1,700	$	—		$	896	$	804	Deductible		$	166
	Eckim		19,289		—			8,636		10,653	(1) Deductible			288
	Yub		10,050		(241	)		2,320		7,971	Not Deductible			376
		$	31,039	$	(241	)	$	11,852	$	19,428			$	830
	(1) Subject to final settlement of the contingent consideration
	(2) Expensed as general and administrative
Component of Identifiable Intangible Assets	The following table sets forth each component of identifiable intangible assets acquired in connection with the acquisitions: (in thousands):
		Padopolis		Eckim			Yub		Total		Estimated
											Useful Life
											(in Years)
	Customer relationships	$	184	$	4,752		$	176	$	5,112		5
	Vendor relationships		—		—			890		890		4
	Developed technologies		596		2,233			692		3,521		5
	Domain names		116		1,651			487		2,254		5
	Patents		—		—			75		75		5
	Total identifiable intangible assets	$	896	$	8,636		$	2,320	$	11,852

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Value of Goodwill	The changes in the carrying value of goodwill are as follows (in thousands):
		Goodwill
	Balance as of December 31, 2012	$	9,874
	Acquisitions		—
	Foreign currency translation		13
	Balance as of December 31, 2013		9,887
	Acquisitions of Padapolis, Eckim and Yub		19,428
	Foreign currency translation		(38	)
	Balance as of December 31, 2014	$	29,277
Intangible Assets	Intangible assets consist of the following (in thousands):
		December 31,			Accumulated			Foreign		December 31,		Weighted
		2014			Amortization			Currency		2014		Average
		Gross						Translation		Net		Amortization
												Period
												(Years)
	Domain names	$	4,968		$	(2,836	)	$	—	$	2,132	4
	Patents		1,050			(570	)		—		480	6
	Customer relationships		7,164			(1,978	)		21		5,207	4
	Vendor relationships		890			(223	)		—		667	3
	Developed technologies		4,117			(834	)		—		3,283	5
	Trade names		167			(121	)		3		49	2
		$	18,356		$	(6,562	)	$	24	$	11,818	4
		December 31,			Accumulated			Foreign		December 31,		Weighted
		2013			Amortization			Currency		2013		Average
		Gross						Translation		Net		Amortization
												Period
												(Years)
	Domain names	$	2,638		$	(2,376	)	$	—	$	262	1
	Patents		900			(470	)		—		430	7
	Customer relationships		2,052			(1,239	)		51		864	3
	Developed technologies		596			(420	)		—		176	3
	Trade names		167			(91	)		5		81	3
		$	6,353		$	(4,596	)	$	56	$	1,813	4
Estimated Amortization of Intangible Assets	Estimated amortization expense related to intangible assets is as follows (in thousands):
		Total
	2015	$	2,974
	2016		2,799
	2017		2,482
	2018		2,244
	2019		1,213
	2020 and beyond		106
	Total estimated amortization expense	$	11,818

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Assumptions Used to Estimate the Fair Value of Stock Options	The fair value of each option was estimated on the date of grant for the periods presented using the following assumptions:
		Year Ended December 31,
		2014				2013				2012
	Expected life (in years)		6.08				6.08				6.08
	Risk-free interest rate	2.33%				1.09% to 1.69%				1.02% to 1.11%
	Volatility		55%			51% to 53%					49%
	Dividend yield	—				—				—
Summary of Stock Option and Restricted Stock Units Award Activity	A summary of the Company’s stock option and RSUs award activity under the Plans is as follows:
						Options Outstanding													RSUs Outstanding
		Shares				Number of				Weighted			Weighted			Aggregate			Number of			Weighted
		Available				Shares				Average			Average			Intrinsic			Shares			Average
		for Grant								Exercise			Remaining			Value						Grant
										Price			Contractual			(in thousands)						Date Fair
													Term (Years)									Value
	Balance as of December 31, 2011		8,735,836				15,376,023			$	2.64			7.21						630,000		$	7.93
	Options granted		(1,339,571	)			1,339,571				5.38
	Options exercised		—				(3,205,478	)			0.72					$	12,117
	Options canceled or expired		1,120,498				(1,136,470	)			5.19
	RSUs granted		(2,295,239	)																2,295,239			5.05
	RSUs canceled or Expired		419,750																	(419,750	)		6.14
	Balance as of December 31, 2012		6,641,274				12,373,646				3.2			6.81			16,550			2,505,489			5.59
	Options granted		(3,709,567	)			3,709,567				12.14
	Options exercised						(2,328,229	)			4.57						9,626
	Options canceled or expired		1,119,277				(1,119,277	)			6.03
	RSUs granted		(2,530,542	)																2,530,542			5.54
	RSUs canceled or Expired		514,840																	(514,840	)		5.33
	Balance as of December 31, 2013		2,035,282				12,635,707				5.87			7.02			68,944			4,521,191			5.59
	Increase in shares authorized		4,000,000
	Options granted		(46,875	)			46,875				16
	Options exercised		—				(3,149,166	)			2.62						33,704
	Options canceled or expired		38,653				(38,653	)			6.2
	RSUs granted		(4,796,559	)																4,796,559			16.49
	RSUs released		—																	(1,913,724	)		5.66
	RSUs canceled or expired		594,611																	(594,611	)		10.12
	Balance as of December 31, 2014		1,825,112				9,494,763				7			6.57			107,913			6,809,415			12.66
	Vested and expected to vest as of						9,046,740				6.73			6.48			104,819
	December 31, 2014
	Vested and exercisable as of						6,769,271				4.76			5.81			89,516
	December 31, 2014
Summary of Option Outstanding and Exercisable	Additional information for options outstanding and exercisable as of December 31, 2014 is as follows:
					Options Outstanding										Options Exercisable
									Weighted Average			Weighted						Weighted
									Remaining			Average						Average
					Number of				Contractual Term			Exercise			Number of			Exercise
	Exercise Prices				Shares				(Years)			Price			Shares			Price
	$  0.14 - $  0.28					1,722,439				3.4		$	0.21			1,722,439		$	0.21
	$  0.37 - $  0.46					65,333				4.67			0.38			65,333			0.38
	$  3.67 - $  5.74					4,332,200				6.43			4.03			3,660,356			3.95
	$  8.64 - $16.26					2,574,791				8.27			11.1			1,104,477			10.82
		$25.00				800,000				8.87			25			216,666			25
						9,494,763										6,769,271
Summary of Assumptions Used to Estimate the Fair Value of Employee Stock Purchase Plan	The fair value of the option feature is estimated using the Black-Scholes model for the period presented based on the following assumptions:
		Year Ended
		31-Dec-14
	Expected life (in years)	0.49  to 0.62
	Risk-free interest rate	0.07%  to 0.08%
	Volatility	55%  to 70%
	Dividend yield	—
Schedule of Stock Based Compensation Expense	The following table sets forth the total stock-based compensation expense resulting from stock options, RSUs ,and ESPP included in the Company’s consolidated statements of operations (in thousands):
		Year Ended December 31,
		2014				2013				2012
	Cost of revenues	$	3,086			$	300			$	378
	Sales and marketing		9,464				1,492				1,880
	Research and development		11,536				1,015				1,532
	General and administrative		11,424				2,374				1,778
	Total stock-based compensation expense	$	35,510			$	5,181			$	5,568

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Components of Loss Before Provision for (Benefit from) Income Taxes	The components of the Company’s loss before provision for (benefit from) income taxes were as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Domestic	$	(20,753	)	$	(9,972	)	$	(58,101	)
	Foreign		(765	)		(1,277	)		(1,398	)
	Total	$	(21,518	)	$	(11,249	)	$	(59,499	)
Components of Provision for (Benefit from) Income Taxes	The components of the provision for (benefit from) income taxes are as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	—		$	—		$	—
	State		3			—			(31	)
	Foreign		—			—			—
	Total current income tax expense (benefit)		3			—			(31	)
	Deferred:
	Federal		1,764			—			—
	State		159			—			—
	Foreign		—			—			(234	)
	Total deferred income tax expense (benefit)		1,923			—			(234	)
	Total	$	1,926		$	—		$	(265	)
Reconciliation of Statutory Income Tax Rate	A reconciliation of the federal statutory income tax rate to the Company’s effective tax rate is as follows:
		Year Ended December 31,
		2014			2013			2012
	Federal tax		(34.00	%)		(34.00	%)		(34.00	%)
	State income tax, net of federal tax benefit		0.54	%		0.05	%		(0.45	%)
	Valuation allowance, net		36.09	%		18.7	%		31.47	%
	Stock-based compensation		3.1	%		10.12	%		1.44	%
	Foreign income taxes at other than U.S. rates		1.21	%		3.86	%		—
	Other		2.01	%		1.27	%		1.1	%
	Effective tax rate		8.95	%		(0.00	%)		(0.44	%)
Components of Deferred Tax Assets and Liabilities	The components of the Company’s deferred tax assets and liabilities are as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Deferred tax assets:
	Credits and net operating loss carryforward	$	57,524		$	58,644
	Accrued compensation		3,441			3,006
	Deferred revenues		113			163
	Stock based compensation		9,420			2,055
	Property and equipment		906			517
	Other deferred tax assets		1,605			854
	Total deferred tax assets		73,009			65,239
	Valuation allowance		(67,450	)		(58,842	)
	Deferred tax liabilities:
	Basis difference on purchased intangible assets		(5,603	)		(6,397	)
	Other deferred tax liabilities		(2,123	)		—
	Total deferred tax liabilities		(7,726	)		(6,397	)
	Net deferred tax assets (liabilities)	$	(2,167	)	$	—
Unrecognized Tax Benefits and Effect on Effective Income Tax Rate	A reconciliation of the gross unrecognized tax benefit is as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Unrecognized tax benefit - beginning balance	$	813		$	285
	Increases for tax positions taken in prior years		553			271
	Increases for tax positions taken in current year		—			257
	Unrecognized tax benefit - ending balance	$	1,366		$	813

Net_Income_Loss_per_Share_Tabl

Net Income (Loss) per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders	The computation of the Company’s basic and diluted net loss per share attributable to common stockholders is as follows (in thousands, except per share data):
		Year Ended December 31,
		2014			2013			2012
	Net loss	$	(23,444	)	$	(11,249	)	$	(59,234	)
	Weighted-average number of common shares used in computing net loss per		67,828			19,626			15,927
	share attributable to common stockholders, basic and diluted
	Net loss per share attributable to common stockholders, basic and diluted	$	(0.35	)	$	(0.57	)	$	(3.72	)
Schedule of Outstanding Common Equivalent Shares Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders	The outstanding common equivalent shares excluded from the computation of the diluted net loss per share attributable to common stockholders for the periods presented because including them would have been antidilutive are as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Redeemable convertible preferred stock		—			41,581			41,581
	Stock options and ESPP		9,587			11,938			15,505
	Restricted stock awards		—			—			—
	Restricted stock units		6,809			3,680			2,108
	Warrants		—			544			393
			16,396			57,743			59,587

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Minimum Payments Under Noncancelable Operating and Capital Leases	As of December 31, 2014, the Company’s unconditional purchase commitments and minimum payments under its noncancelable operating and capital leases are as follows (in thousands):
		Operating Leases		Capital Leases
	2015	$	3,525	$	68
	2016		3,352		52
	2017		172		22
	2018		126		18
	2019		109		1
	2020 and thereafter		—		—
	Total minimum payments	$	7,284	$	161
	Less: Amount representing interest				11
	Present value of capital lease obligations				150
	Less: Current portion				62
	Capital lease obligation, net of current portion			$	88

Concentrations_Tables

Concentrations (Tables)	12 Months Ended
	Dec. 31, 2014
Risks And Uncertainties [Abstract]
Major Customers by Accounts Receivable and Revenues Balances	Customers with an accounts receivable balance of 10% or greater of the total accounts receivable are as follows:
		December 31,
		2014			2013
	Customer A		19	%		11	%
	Customers with 10% or more of revenues during the periods presented are as follows:
		December 31,
		2014			2013		2012
	Customer A		14	%	*		*
	* Less than 10%

Background_Additional_Informat

Background - Additional Information (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2014
Accounting Policies [Abstract]
Issuance of common stock, initial public offering, shares	12,075,000
Common stock, price per share	$16
Proceeds from initial public offering, net of offering costs	$179,700,000	$176,525,000
Underwriting discounts and commissions	13,500,000
Offering expenses	5,400,000
Conversion of preferred stock to common stock, shares	41,580,507
Share based compensation expenses, recognized		$29,500,000

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Details) (USD $)	0 Months Ended	12 Months Ended
	Feb. 19, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Reverse stock split of capital stock description	2.5
Estimated useful life of assets		3 years
Impairment of goodwill		$0	$0	$0
Impairment of long-lived assets		0	0	0
Deferred revenue, description		Deferred revenues consist of coupon setup fees and activation fees that are expected to be recognized upon coupon activations, which generally occurs within the next 12 months.
Deferred revenue, revenue recognized period		12 months
Share based compensation expenses, recognized		29,500,000
Percentage of service condition and liquidity event condition		25.00%
Contractual term		7 years
Advertising Cost		830,000	1,917,000	7,404,000
Lesser Than Level Of Certainty
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Income tax benefit recognized from uncertain tax positions		$0
Greater Than Level Of Certainty
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Income tax benefit minimum percentage from uncertain tax positions		50.00%
Computer Equipment and Software
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets		3 years
All Other Asset
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets		5 years
Cash and Cash Equivalents | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Liquid investments maturity		3 months

Fair_Value_Measurements_Financ

Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets:
Assets fair value	$14,928		$14,918
Liabilities:
Liabilities fair value	1,048
Money Market Funds
Assets:
Assets fair value	14,928	[1]	14,918	[1]
Contingent Consideration
Liabilities:
Liabilities fair value	1,048	[2]
Level 1
Assets:
Assets fair value	14,928		14,918
Level 1 | Money Market Funds
Assets:
Assets fair value	14,928	[1]	14,918	[1]
Level 3
Liabilities:
Liabilities fair value	1,048
Level 3 | Contingent Consideration
Liabilities:
Liabilities fair value	$1,048	[2]
[1]	Included in cash and cash equivalents
[2]	Included in other current liabilities

Fair_Value_Measurements_Summar

Fair Value Measurements - Summary of Changes in Contingent Consideration (Details) (Level 3, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Acquisition date fair value measurement	$6,789
Change in fair value	-5,741
Balance as of December 31, 2014	$1,048

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Gain on remeasurement of contingent consideration	$5,741,000

Allowance_for_Doubtful_Account2

Allowance for Doubtful Accounts - Summary of Activity in Allowance for Doubtful Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Receivables [Abstract]
Balance at beginning of period	$332	$270	$228
Bad debt expense	136	155	312
Recoveries (write-offs), net	-60	-93	-270
Balance at end of period	$408	$332	$270

Balance_Sheet_Components_Prope

Balance Sheet Components - Property and Equipment, Net (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property Plant And Equipment [Line Items]
Property and equipment, Total	$52,154	$24,288
Accumulated depreciation and amortization	-28,783	-17,491
Projects in process	2,028	23,145
Property and equipment, net	25,399	29,942
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment, Total	17,325	15,172
Software
Property Plant And Equipment [Line Items]
Property and equipment, Total	30,791	5,294
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, Total	1,645	1,611
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, Total	$2,393	$2,211

Balance_Sheet_Components_Addit

Balance Sheet Components - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property Plant And Equipment [Line Items]
Depreciation and amortization	$12,771,000	$5,923,000	$5,838,000
Disposals	1,480,000	127,000	183,000
Loss on disposals	-9,000	-1,000	-75,000
Capitalized costs	3,552,000	6,857,000
Amortization expense recognized	7,697,000	0	0
Unamortized costs	19,000,000	23,145,000
Assets Held under Capital Leases
Property Plant And Equipment [Line Items]
Depreciation and amortization	80,000	65,000	64,000
Other Capitalized Software
Property Plant And Equipment [Line Items]
Capitalized costs	16,000	0
Amortization expense recognized	106,000	165,000	324,000
Unamortized costs	$79,000	$169,000

Balance_Sheet_Components_Accru

Balance Sheet Components - Accrued Compensation and Benefits (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Payables And Accruals [Abstract]
Bonus	$6,909	$5,949
Payroll and related expenses	2,067	1,131
Commissions	3,458	4,297
Vacation	2,427	2,344
Accrued compensation and benefits	$14,861	$13,721

Balance_Sheet_Components_Other

Balance Sheet Components - Other Current Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Liabilities Disclosure [Abstract]
Legal and professional fees	$1,699	$1,742
Marketing expenses	3,415	1,492
Distribution fees	5,805	5,628
Accrued property and equipment	687	1,252
Deferred rent	536	453
Contingent consideration	1,048
Other	2,600	3,132
Other current liabilities	$15,790	$13,699

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Details) (USD $)	0 Months Ended
In Thousands, except Share data, unless otherwise specified	Oct. 10, 2014	Aug. 04, 2014	Jan. 02, 2014
Padapolis, Inc
Business Acquisition [Line Items]
Total acquisition consideration	$1,700
Eckim, LLC
Business Acquisition [Line Items]
Total acquisition consideration		19,289
Cash payments for purchase of assets		12,500
Contingent consideration, value of shares issuable		6,789
Business combination, contingent consideration milestones date		31-Dec-15
Business combination, contingent consideration issuable date		30-Apr-16
Yub, Inc
Business Acquisition [Line Items]
Total acquisition consideration			$10,050
Total acquisition consideration (Shares)			1,000,040
Business acquisition, common stock per share			$10.05

Acquisitions_Schedule_of_Consi

Acquisitions - Schedule of Consideration Paid for Each Acquisition and the Related Fair Values of Assets Acquired and Liabilities Assumed (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Business Acquisition [Line Items]
Purchase Consideration	$31,039
Net Tangible Assets Acquired/ (Liabilities Assumed)	-241
Identifiable Intangible Assets	11,852
Goodwill	19,428
Acquisition Related Expenses	830
Padapolis, Inc
Business Acquisition [Line Items]
Purchase Consideration	1,700
Identifiable Intangible Assets	896
Goodwill	804
Goodwill Deductible for Taxes	Deductible
Acquisition Related Expenses	166
Eckim, LLC
Business Acquisition [Line Items]
Purchase Consideration	19,289
Identifiable Intangible Assets	8,636
Goodwill	10,653
Goodwill Deductible for Taxes	Deductible
Acquisition Related Expenses	288
Yub, Inc
Business Acquisition [Line Items]
Purchase Consideration	10,050
Net Tangible Assets Acquired/ (Liabilities Assumed)	-241
Identifiable Intangible Assets	2,320
Goodwill	7,971
Goodwill Deductible for Taxes	Not Deductible
Acquisition Related Expenses	$376

Acquisitions_Component_of_Iden

Acquisitions - Component of Identifiable Intangible Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	$11,852
Estimated Useful Life (in Years)	3 years
Padapolis, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	896
Eckim, LLC
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	8,636
Yub, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	2,320
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	5,112
Estimated Useful Life (in Years)	5 years
Customer Relationships | Padapolis, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	184
Customer Relationships | Eckim, LLC
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	4,752
Customer Relationships | Yub, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	176
Vendor Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	890
Estimated Useful Life (in Years)	4 years
Vendor Relationships | Yub, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	890
Developed Technologies
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	3,521
Estimated Useful Life (in Years)	5 years
Developed Technologies | Padapolis, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	596
Developed Technologies | Eckim, LLC
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	2,233
Developed Technologies | Yub, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	692
Domain Names
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	2,254
Estimated Useful Life (in Years)	5 years
Domain Names | Padapolis, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	116
Domain Names | Eckim, LLC
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	1,651
Domain Names | Yub, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	487
Patents
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	75
Estimated Useful Life (in Years)	5 years
Patents | Yub, Inc
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable Intangible Assets	$75

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Changes in Carrying Value of Goodwill (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning Balance	$9,887	$9,874
Acquisitions	19,428
Foreign currency translation	-38	13
Ending Balance	$29,277	$9,887

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Intangible Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Gross	$18,356	$6,353
Accumulated Amortization	-6,562	-4,596
Foreign Currency Translation	24	56
Net	11,818	1,813
Weighted Average Amortization Period (Years)	4 years	4 years
Domain Names
Finite Lived Intangible Assets [Line Items]
Gross	4,968	2,638
Accumulated Amortization	-2,836	-2,376
Net	2,132	262
Weighted Average Amortization Period (Years)	4 years	1 year
Patents
Finite Lived Intangible Assets [Line Items]
Gross	1,050	900
Accumulated Amortization	-570	-470
Net	480	430
Weighted Average Amortization Period (Years)	6 years	7 years
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross	7,164	2,052
Accumulated Amortization	-1,978	-1,239
Foreign Currency Translation	21	51
Net	5,207	864
Weighted Average Amortization Period (Years)	4 years	3 years
Vendor Relationships
Finite Lived Intangible Assets [Line Items]
Gross	890
Accumulated Amortization	-223
Net	667
Weighted Average Amortization Period (Years)	3 years
Developed Technologies
Finite Lived Intangible Assets [Line Items]
Gross	4,117	596
Accumulated Amortization	-834	-420
Net	3,283	176
Weighted Average Amortization Period (Years)	5 years	3 years
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross	167	167
Accumulated Amortization	-121	-91
Foreign Currency Translation	3	5
Net	$49	$81
Weighted Average Amortization Period (Years)	2 years	3 years

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Additional Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$1,966	$936	$718

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Estimated Amortization of Intangible Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]
2015	$2,974
2016	2,799
2017	2,482
2018	2,244
2019	1,213
2020 and beyond	106
Net	$11,818	$1,813

Debt_Obligations_Additional_In

Debt Obligations - Additional Information (Details) (USD $)	1 Months Ended		12 Months Ended	1 Months Ended
	Feb. 28, 2014	Oct. 31, 2012	Dec. 31, 2014	31-May-14	Apr. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Debt Instrument [Line Items]
Debt obligations			$7,500,000			$7,500,000
2012 Note Payable, Related Party
Debt Instrument [Line Items]
Borrowings from stockholders		15,000,000
Stated interest rate of subordinated note		4.00%
Warrants issued to purchase common stock		400,000
Warrants exercise price per share		$4.03
Exercise of warrant, shares	400,000
Revolving Credit Facility
Debt Instrument [Line Items]
Current maximum amount available for borrowing							25,000,000
Increased maximum amount available for borrowing							30,000,000
Line of credit Facility, alternative maximum amount available for borrowing conditions			an amount equal to 85% of certain eligible accounts, which excludes accounts that are over 60 days outstanding from the original due date.
Maturity date of line of credit			30-Sep-16
Line of credit facility interest at end of the period			2.38%
Line of Credit Facility, Interest Rate Description			Interest is charged at a floating interest rate based on the daily three month LIBOR, plus an applicable margin.
Commitment fee on the unused portion of the revolving credit facility, percentage			0.25%
Debt obligations			$7,500,000			$7,500,000
Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Floating interest rate based on the daily three month LIBOR, plus applicable margin				2.00%	2.75%

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Details) (USD $)	1 Months Ended	12 Months Ended
	Nov. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value		$8.60	$3.05	$2.55
Maximum contribution of base compensation for employee stock purchase plan		15.00%
Offering period of employee stock purchase plan		6 months
Purchase price of common stock percentage of fair market value		85.00%
Issuance of common stock, stock purchase plan, shares	172,277
Shares available for issuance		1,027,723
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance		1,200,000
Increase in the number of shares available for issuance description		(i) 0.5% of the outstanding shares of common stock on the last day of the immediately preceding year, (ii) 400,000 shares or (iii) such other amount as may be determined by the board of directors.
Initial offering period		initial offering period which commenced in March 2014 and ended in November 2014
Scenario One | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of outstanding stock		0.50%
Scenario Two | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Annual increases in number of shares available for issuance		400,000
2013 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance		4,000,000
Percentage of outstanding stock		4.00%
Options expiration period		10 years
2013 Equity Incentive Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted price per share percent		100.00%
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of shares vested, total		$5,749,000	$5,130,000	$5,739,000
Unrecognized stock based compensation, net of forfeitures		54,683,000
Unrecognized stock based compensation, amortized weighted average period		3 years 2 months 12 days
Stock Based Compensation Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock based compensation, net of forfeitures		61,964,000
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock based compensation, net of forfeitures		$7,281,000
Unrecognized stock based compensation, amortized weighted average period		2 years 4 months 24 days

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of Assumptions Used to Estimate the Fair Value of Stock Options (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)	6 years 29 days	6 years 29 days	6 years 29 days
Risk-free interest rate	2.33%
Volatility	55.00%		49.00%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate		1.09%	1.02%
Volatility		51.00%
Minimum | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)	5 months 27 days
Risk-free interest rate	0.07%
Volatility	55.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate		1.69%	1.11%
Volatility		53.00%
Maximum | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)	7 months 13 days
Risk-free interest rate	0.08%
Volatility	70.00%

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Stock Option and Restricted Stock Units Award Activity (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Shares Available for Grant
Beginning balance	2,035,282	6,641,274	8,735,836
Increase in shares authorized	4,000,000
Options granted	-46,875	-3,709,567	-1,339,571
Options canceled or expired	38,653	1,119,277	1,120,498
RSUs granted	-4,796,559	-2,530,542	-2,295,239
RSUs canceled or Expired	594,611	514,840	419,750
Ending balance	1,825,112	2,035,282	6,641,274	8,735,836
Number of Shares
Beginning balance	12,635,707	12,373,646	15,376,023
Options granted	46,875	3,709,567	1,339,571
Options exercised	-3,149,166	-2,328,229	-3,205,478
Options canceled or expired	-38,653	-1,119,277	-1,136,470
Ending balance	9,494,763	12,635,707	12,373,646	15,376,023
Vested and expected to vest at the end of period	9,046,740
Vested and exercisable at the end of period	6,769,271
Weighted Average Exercise Price
Beginning balance	$5.87	$3.20	$2.64
Options granted	$16	$12.14	$5.38
Options exercised	$2.62	$4.57	$0.72
Options canceled or expired	$6.20	$6.03	$5.19
Ending balance	$7	$5.87	$3.20	$2.64
Vested and expected to vest at the end of period	$6.73
Vested and exercisable at the end of period	$4.76
Weighted Average Remaining Contractual Term (Years)
Balance	6 years 6 months 26 days	7 years 7 days	6 years 9 months 22 days	7 years 2 months 16 days
Vested and expected to vest at the end of period	6 years 5 months 23 days
Vested and exercisable at the end of period	5 years 9 months 22 days
Aggregate Intrinsic Value
Beginning balance	$68,944	$16,550
Options exercised	33,704	9,626	12,117
Ending balance	107,913	68,944	16,550
Vested and expected to vest at the end of period	104,819
Vested and exercisable at the end of period	$89,516
Restricted Stock Units, Number of Shares
Beginning balance	4,521,191	2,505,489	630,000
RSUs granted	4,796,559	2,530,542	2,295,239
RSUs canceled or Expired	-594,611	-514,840	-419,750
Ending balance	6,809,415	4,521,191	2,505,489	630,000
RSUs released	-1,913,724
Weighted Average Grant Date Fair Value
Beginning balance	$5.59	$5.59	$7.93
RSUs granted	$16.49	$5.54	$5.05
RSUs canceled or Expired	$10.12	$5.33	$6.14
Ending balance	$12.66	$5.59	$5.59	$7.93
RSUs released	$5.66

ShareBased_Compensation_Balanc

Share-Based Compensation - Balance of Outstanding and Exercisable Stock Options (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding number of Options	9,494,763	12,635,707	12,373,646	15,376,023
Exercisable number of Options	6,769,271
Exercise Prices 0.14 - 0.28
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Price Range, Minimum	$0.14
Price Range, Maximum	$0.28
Outstanding number of Options	1,722,439
Outstanding Average Life	3 years 4 months 24 days
Outstanding Average Exercise Price	$0.21
Exercisable number of Options	1,722,439
Exercisable, Weighted Average Exercise Price	$0.21
Exercise Prices 0.37 - 0.46
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Price Range, Minimum	$0.37
Price Range, Maximum	$0.46
Outstanding number of Options	65,333
Outstanding Average Life	4 years 8 months 1 day
Outstanding Average Exercise Price	$0.38
Exercisable number of Options	65,333
Exercisable, Weighted Average Exercise Price	$0.38
Exercise Prices 3.67 - 5.74
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Price Range, Minimum	$3.67
Price Range, Maximum	$5.74
Outstanding number of Options	4,332,200
Outstanding Average Life	6 years 5 months 5 days
Outstanding Average Exercise Price	$4.03
Exercisable number of Options	3,660,356
Exercisable, Weighted Average Exercise Price	$3.95
Exercise Prices 8.64 - 16.26
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Price Range, Minimum	$8.64
Price Range, Maximum	$16.26
Outstanding number of Options	2,574,791
Outstanding Average Life	8 years 3 months 7 days
Outstanding Average Exercise Price	$11.10
Exercisable number of Options	1,104,477
Exercisable, Weighted Average Exercise Price	$10.82
Exercise Prices 25.00
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Price Range	$25
Outstanding number of Options	800,000
Outstanding Average Life	8 years 10 months 13 days
Outstanding Average Exercise Price	$25
Exercisable number of Options	216,666
Exercisable, Weighted Average Exercise Price	$25

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Stock Based Compensation Expense (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$35,510	$5,181	$5,568
Cost of Revenues
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	3,086	300	378
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	9,464	1,492	1,880
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	11,536	1,015	1,532
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$11,424	$2,374	$1,778

Redeemable_Convertible_Preferr1

Redeemable Convertible Preferred Stock - Additional Information (Details)	Mar. 31, 2014
Temporary Equity Disclosure [Abstract]
Preferred stock converted into shares of common stock	41,580,507

Stockholders_Equity_Deficit_Ad

Stockholders' Equity (Deficit) - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Stockholders Equity Note [Abstract]
Common stock, shares authorized	250,000,000	96,000,000	250,000,000
Preferred stock, shares authorized	10,000,000	0	10,000,000
Common stock, voting rights	Amendment. The amendment of the provisions in the restated certificate requires approval by holders of at least 66 2/3% of the Company’s outstanding capital stock entitled to vote generally in the election of directors.
Liability is reclassified to stockholders equity on a ratable basic as the award vests	$0	$48,000
Liability related to unvested exercised options	$0	$0

Income_Taxes_Components_of_Los

Income Taxes - Components of Loss Before Provision for (Benefit from) Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Domestic	($20,753)	($9,972)	($58,101)
Foreign	-765	-1,277	-1,398
Total	($21,518)	($11,249)	($59,499)

Income_Taxes_Components_of_Pro

Income Taxes - Components of Provision for (Benefit from) Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
State	$3,000		($31,000)
Total current income tax expense (benefit)	3,000		-31,000
Deferred:
Federal	1,764,000
State	159,000
Foreign			-234,000
Total deferred income tax expense (benefit)	1,923,000		-234,000
Total	$1,926,000	$0	($265,000)

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Statutory Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal tax	-34.00%	-34.00%	-34.00%
State income tax, net of federal tax benefit	0.54%	0.05%	-0.45%
Valuation allowance, net	36.09%	18.70%	31.47%
Stock-based compensation	3.10%	10.12%	1.44%
Foreign income taxes at other than U.S. rates	1.21%	3.86%
Other	2.01%	1.27%	1.10%
Effective tax rate	8.95%	0.00%	-0.44%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Line Items]
Provision for (benefit from) income taxes	$1,926,000	$0	($265,000)
Deferred tax assets	73,009,000	65,239,000
Deferred tax liabilities	7,726,000	6,397,000
Increase in valuation allowance	8,608,000	3,242,000
Operating loss carryforwards	54,985,000	15,601,000
Unrecognized tax benefits	1,366,000	813,000	285,000
Income tax penalties and interest accrued	0	0
Federal
Income Tax Disclosure [Line Items]
Operating loss carryforwards	198,576,000
Operating loss carryforwards expiration year	2019
Federal | Research
Income Tax Disclosure [Line Items]
Tax credit carryforwards	397,000
Tax credit carryforwards expiration year	2033
State
Income Tax Disclosure [Line Items]
Operating loss carryforwards	181,526,000
Operating loss carryforwards expiration year	2016
State | Research
Income Tax Disclosure [Line Items]
Tax credit carryforwards	$416,000

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Credits and net operating loss carryforward	$57,524	$58,644
Accrued compensation	3,441	3,006
Deferred revenues	113	163
Stock based compensation	9,420	2,055
Property and equipment	906	517
Other deferred tax assets	1,605	854
Total deferred tax assets	73,009	65,239
Valuation allowance	-67,450	-58,842
Deferred tax liabilities:
Basis difference on purchased intangible assets	-5,603	-6,397
Other deferred tax liabilities	-2,123
Total deferred tax liabilities	-7,726	-6,397
Net deferred tax assets (liabilities)	($2,167)

Income_Taxes_Unrecognized_Tax_

Income Taxes - Unrecognized Tax Benefits and Effect on Effective Income Tax Rate (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Unrecognized tax benefit - beginning balance	$813	$285
Increases for tax positions taken in prior years	553	271
Increases for tax positions taken in current year		257
Unrecognized tax benefit - ending balance	$1,366	$813

Net_Income_Loss_per_Share_Sche

Net Income (Loss) per Share - Schedule of Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net loss	($23,444)	($11,249)	($59,234)
Weighted-average number of common shares used in computing net loss per share attributable to common stockholders, basic and diluted	67,828	19,626	15,927
Net loss per share attributable to common stockholders, basic and diluted	($0.35)	($0.57)	($3.72)

Net_Income_Loss_per_Share_Sche1

Net Income (Loss) per Share - Schedule of Outstanding Common Equivalent Shares Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders (Details)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares	16,396	57,743	59,587
Stock Options and ESPP
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares	9,587	11,938	15,505
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares	6,809	3,680	2,108
Warrant
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares		544	393
Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares		41,581	41,581

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments And Contingencies [Line Items]
Rent expense	$2,736,000	$2,658,000	$2,421,000
Marketing Arrangements
Commitments And Contingencies [Line Items]
Long-term commitments	7,520,000
Period of long-term commitments	2015 to 2034
Service Agreements
Commitments And Contingencies [Line Items]
Non-refundable payments under service agreements	19,250,000
Initial non-refundable payments under service agreements	$8,850,000
Minimum
Commitments And Contingencies [Line Items]
Term of noncancelable operating lease	1 year
Maximum
Commitments And Contingencies [Line Items]
Term of noncancelable operating lease	5 years

Commitments_and_Contingencies_2

Commitments and Contingencies - Minimum Payments Under Noncancelable Operating and Capital Leases (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Operating Leases
2015	$3,525
2016	3,352
2017	172
2018	126
2019	109
Total minimum payments	7,284
Capital Leases
2015	68
2016	52
2017	22
2018	18
2019	1
Total minimum payments	161
Less: Amount representing interest	11
Present value of capital lease obligations	150
Less: Current portion	62
Capital lease obligation, net of current portion	$88

Employee_Benefit_Plan_Addition

Employee Benefit Plan - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]
Rate at which the company matches employee contribution	3.00%
Maximum contribution amount	$6,000
Defined contribution vesting period	4 years
Matching contribution expense	$1,466,000	$1,312,000	$1,287,000

Concentrations_Major_Customers

Concentrations - Major Customers by Accounts Receivable and Revenues Balances (Details) (Customer Concentration Risk, Customer A)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accounts Receivable
Concentration Risk [Line Items]
Concentration risk percentage	19.00%	11.00%
Revenues
Concentration Risk [Line Items]
Concentration risk percentage	14.00%

Subsequent_Events_Additional_I

Subsequent Events- Additional Information (Details) (Subsequent Events, Stock Repurchase Program through February 2016, Common Stock, Maximum, USD $)	Feb. 28, 2015
Subsequent Events | Stock Repurchase Program through February 2016 | Common Stock | Maximum
Subsequent Event [Line Items]
Repurchase of authorized common stock	$50,000,000