Quotient Technology (QUOT) 10-Q 3 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	QUOT
Entity Registrant Name	Quotient Technology Inc.
Entity Central Index Key	1,115,128
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		92,784,396

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 158,664	$ 106,174
Short-term investments	24,607	69,172
Accounts receivable, net of allowance for doubtful accounts of $913 and $1,338 at September 30, 2017 and December 31, 2016, respectively	78,476	71,945
Prepaid expenses and other current assets	8,530	6,293
Total current assets	270,277	253,584
Property and equipment, net	15,638	16,376
Intangible assets, net	49,446	47,987
Goodwill	80,506	43,895
Other assets	936	914
Total assets	416,803	362,756
Current liabilities:
Accounts payable	4,129	4,968
Accrued compensation and benefits	11,811	13,202
Other current liabilities	28,839	20,864
Contingent consideration related to acquisitions	16,200
Deferred revenues	7,575	6,856
Total current liabilities	68,554	45,890
Other non-current liabilities	520	78
Deferred rent	1,922	2,285
Contingent consideration related to acquisitions		185
Deferred tax liabilities	2,466	2,569
Total liabilities	73,462	51,007
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.00001 par value—10,000,000 shares authorized and no shares issued or outstanding at September 30, 2017 and December 31, 2016
Common stock, $0.00001 par value—250,000,000 shares authorized; 102,336,142 shares issued and 92,688,435 outstanding at September 30, 2017; 98,208,117 shares issued and 88,560,409 outstanding at December 31, 2016	1	1
Additional paid-in capital	701,679	647,474
Treasury stock, at cost	(96,574)	(96,574)
Accumulated other comprehensive loss	(721)	(748)
Accumulated deficit	(261,044)	(238,404)
Total stockholders’ equity	343,341	311,749
Total liabilities and stockholders’ equity	$ 416,803	$ 362,756

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 913	$ 1,338
Preferred stock, par value	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	102,336,142	98,208,117
Common stock, shares outstanding	92,688,435	88,560,409

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues	$ 81,950	$ 66,470	$ 229,022	$ 199,768
Costs and expenses:
Cost of revenues	37,501	35,126	96,734	85,500
Sales and marketing	22,002	20,415	67,456	67,656
Research and development	12,255	12,414	38,149	38,419
General and administrative	11,702	10,041	35,398	32,394
Change in fair value of escrowed shares and contingent consideration, net	9,700	105	11,015	(963)
Total costs and expenses	93,160	78,101	248,752	223,006
Loss from operations	(11,210)	(11,631)	(19,730)	(23,238)
Other income (expense), net	276	398	537	418
Loss before income taxes	(10,934)	(11,233)	(19,193)	(22,820)
Provision for (benefit from) income taxes	(107)	79	66	193
Net loss	$ (10,827)	$ (11,312)	$ (19,259)	$ (23,013)
Net loss per share, basic and diluted	$ (0.12)	$ (0.13)	$ (0.22)	$ (0.28)
Weighted-average number of common shares used in computing net loss per share, basic and diluted	90,492	84,732	89,000	83,484

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (10,827)	$ (11,312)	$ (19,259)	$ (23,013)
Other comprehensive income:
Foreign currency translation adjustments	(21)	3	27	9
Comprehensive loss	$ (10,848)	$ (11,309)	$ (19,232)	$ (23,004)

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (19,259)	$ (23,013)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	13,280	16,252
Stock-based compensation	24,302	21,647
Loss on disposal of property and equipment		245
Allowance for doubtful accounts	(548)	237
Deferred income taxes	66	193
One-time charge for certain distribution fees		7,435
Change in fair value of escrowed shares and contingent consideration, net	11,015	(963)
Changes in operating assets and liabilities:
Accounts receivable	(1,776)	(3,970)
Prepaid expenses and other current assets	(2,231)	(596)
Accounts payable and other current liabilities	5,882	(3,720)
Accrued compensation and benefits	(1,454)	(5,180)
Deferred revenues	718	408
Net cash provided by operating activities	29,995	8,975
Cash flows from investing activities:
Purchases of property and equipment	(4,383)	(5,004)
Purchase of intangible assets		(63)
Acquisitions, net of cash acquired	(21,048)
Purchases of short-term investments	(64,685)	(69,116)
Proceeds from maturities of short-term investment	109,250	25,000
Net cash provided by (used in) investing activities	19,134	(49,183)
Cash flows from financing activities:
Proceeds from issuances of common stock under stock plans	5,880	9,613
Payments for taxes related to net share settlement of equity awards	(2,326)
Repurchases of common stock		(11,819)
Principal payments on promissory note and capital lease obligations	(161)	(38)
Net cash provided by (used in) financing activities	3,393	(2,244)
Effect of exchange rates on cash and cash equivalents	(32)	1
Net increase (decrease) in cash and cash equivalents	52,490	(42,451)
Cash and cash equivalents at beginning of period	106,174	134,947
Cash and cash equivalents at end of period	158,664	92,496
Supplemental disclosures of cash flow information:
Cash paid for income taxes	113	94
Cash paid for interest	20	3
Supplemental disclosures of noncash investing and financing activities:
Fair value of common stock issued in connection with a services and data agreement		39,570
Fixed asset purchases not yet paid	461	$ 1,163
Computer equipment acquired under promissory note	819
Property and equipment acquired under capital lease	31
Crisp Acquisition
Supplemental disclosures of noncash investing and financing activities:
Issuance of shares related to Crisp acquisition	$ 12,957

Description of Business

Description of Business	9 Months Ended
	Sep. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business	1. Description of Business Quotient Technology Inc. (“Quotient” or, the “Company”), is a provider of an industry leading digital platform that enables consumer packaged goods (“CPG”) brands and retailers to engage shoppers through personalized and targeted promotions and media. Through our platform, CPGs and retailers are able to use online and in-store point-of-sale (POS) shopper data and analytics to drive sales with improved efficiency, as compared to traditional offline promotional and advertising vehicles.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. The Company’s condensed 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. The accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year ending December 31, 2017 or for any other period. There have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K that have had a material impact on its condensed consolidated financial statements and related notes, except for Company electing to change its accounting policy to account for forfeitures as they occur. The change was applied on a modified retrospective basis with a cumulative effect adjustment of $3.4 million recorded to accumulated deficit balance as of January 1, 2017. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the Company’s condensed consolidated financial statements and accompanying notes. Such management estimates include, but are not limited to, revenue recognition, collectability of accounts receivable, recoverability of non-refundable distribution fees, the valuation and useful lives of intangible assets and property and equipment, goodwill, stock-based compensation, contingent consideration and income taxes. Actual results may differ from the Company’s estimates, and such differences may be material to the accompanying condensed consolidated financial statements. Recently Issued Accounting Pronouncements Accounting Pronouncements Not Yet Adopted In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606). Early adoption is permitted, but not before the original effective date of the amendment, which was the first quarter of 2017. The Company is continuing to evaluate the overall impact of the new standard on its accounting policies, processes, system requirements, and internal controls over financial reporting. In addition to internal resources, the Company engaged third-party service providers to assist with the evaluation. The Company has made and will continue to make investments in systems to enable timely and accurate reporting under the new standard. The Company currently anticipates adopting the standard using the modified retrospective method. While the Company is still in the process of completing its analysis on the impact the guidance will have on its consolidated financial statements, related disclosures, and internal controls over financial reporting, it does not expect the impact to be material. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows Classification of Certain Cash Receipts and Cash Payments Accounting Pronouncements Adopted In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . The guidance requires all of the tax effects related to share based payments to be recorded through the income statement. The guidance also removes the present requirement to delay recognition of an excess tax benefit (“windfall tax benefit”) until it reduces current taxes payable; instead it is recognized at the time of settlement, subject to normal valuation allowance consideration. While the simplification will eliminate some administrative complexities, it will increase the volatility of income tax expense. The standard was effective for the Company beginning January 1, 2017, and interim periods within that reporting period. Early adoption was permitted. The Company adopted ASU 2016-09 in the first quarter of 2017. Upon adoption, the Company elected to change its accounting policy to account for forfeitures as they occur. The change was applied on a modified retrospective basis with a cumulative effect adjustment of $3.4 million recorded to accumulated deficit balance as of January 1, 2017. The amendments related to accounting for previously unrecognized excess tax benefits as deferred tax assets have been adopted on a modified retrospective basis with a cumulative-effect adjustment to opening retained earnings of $25.5 million, fully offset by a valuation allowance. This adjustment resulted in no impact to retained earnings upon adoption. The amendments related to accounting for excess tax benefits have been adopted prospectively, resulting in no impact as the Company is in a net operating loss position with a full valuation allowance.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
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): September 30, 2017 Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents: Money market funds $ 25,068 — — $ 25,068 Certificate of deposit — 35,092 — 35,092 Short-Term investments: Certificate of deposit — 24,607 — 24,607 Total $ 25,068 $ 59,699 $ — $ 84,767 Liabilities: Contingent consideration related to Crisp acquisition (1) — — 16,200 16,200 Contingent consideration related to Shopmium acquisition (1) — — — — Total $ — $ — $ 16,200 $ 16,200 December 31, 2016 Level 1 Level 2 Level 3 Total Assets: Short-Term investments: Certificate of deposit — 69,172 — 69,172 Total $ — $ 69,172 $ — $ 69,172 Liabilities: Contingent consideration related to Shopmium acquisition (1) — — 185 185 Total $ — $ — $ 185 $ 185 (1) Included in contingent consideration related to acquisitions The valuation technique used to measure the fair value of money market funds included using quoted prices in active markets. The money market funds have a fixed net asset value (NAV) of $1. The valuation technique to measure the fair value of certificate of deposits included using quoted prices in active markets for similar assets. The fair value of contingent consideration related to the acquisition of Crisp Media, Inc. (“Crisp”) was estimated using an option pricing method and was based on significant inputs not observable in the market, thus classified as a Level 3 instrument. The inputs include expected achievement of certain financial metrics over the contingent consideration period, historical volatility and discount rate. Refer to Note 6 for further details related to the acquisition. The fair value of contingent consideration related to the acquisition of Shopmium S.A. (“Shopmium”) 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 expected achievement of certain revenue and profit milestones for the years ending December 31, 2016 and 2017, historical volatility and risk-free interest rate. The following table represents the change in the contingent consideration (in thousands): Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 Shopmium Crisp Shopmium Crisp Level 3 Level 3 Level 3 Level 3 Balance at the beginning of period $ — $ 14,800 $ 185 $ — Addition related to acquisition — — — 14,800 Change in fair value — 1,400 (185 ) 1,400 Balance as of September 30, 2017 $ — $ 16,200 $ — $ 16,200 For the three and nine months ended September 30, 2017, the Company recorded losses of $1.4 million and $1.2 million, respectively, related to the changes in fair value of contingent consideration. The change in fair value of Shopmium contingent consideration is due to a decline in expected revenue and profit milestones for the years ending December 31, 2016 and 2017. The change in fair value of Crisp contingent consideration is due to an increase in expected achievement of certain financial metrics over the contingent consideration period. The There were no transfers between fair value hierarchies during the three and nine months ended September 30, 2017 and 2016.

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Allowance for Doubtful Accounts	4. Allowance for Doubtful Accounts The summary of activity in the allowance for doubtful accounts is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance at the beginning of period $ 1,035 $ 883 $ 1,338 $ 833 Additions related to Crisp acquisition — — 229 — Bad debt expense (recovery) (51 ) 86 (548 ) 237 Write-offs, net (71 ) (38 ) (106 ) (139 ) Balance at the end of period $ 913 $ 931 $ 913 $ 931

Balance Sheet Components

Balance Sheet Components	9 Months Ended
	Sep. 30, 2017
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): September 30, 2017 December 31, 2016 Software $ 32,803 $ 32,286 Computer equipment 24,133 22,664 Leasehold improvements 8,187 8,141 Furniture and fixtures 2,354 2,296 Total 67,477 65,387 Accumulated depreciation and amortization (55,493 ) (50,249 ) Projects in process 3,654 1,238 Property and equipment, net $ 15,638 $ 16,376 Depreciation and amortization expense related to property and equipment was $1.6 million and $4.1 million for the three months ended September 30, 2017 and 2016, respectively, and $5.3 million and $12.0 million for the nine months ended September 30, 2017 and 2016, respectively. The Company capitalized internal use software development and enhancement costs of $1.0 million and $0.3 million during the three months ended September 30, 2017 and 2016, respectively, and $3.1 million and $0.4 million Accrued Compensation and Benefits Accrued compensation and benefits consist of the following (in thousands): September 30, 2017 December 31, 2016 Bonus $ 5,164 $ 5,985 Commissions 2,549 3,572 Vacation 1,380 1,916 Payroll and related expenses 2,718 1,729 Accrued compensation and benefits $ 11,811 $ 13,202 Other Current Liabilities Other current liabilities consist of the following (in thousands): September 30, 2017 December 31, 2016 Distribution fees $ 16,633 $ 12,463 Marketing expenses 1,915 3,383 Prefunded Liability 1,890 1,345 Traffic Acquisition Cost 1,747 — Other 6,654 3,673 Other current liabilities $ 28,839 $ 20,864

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions	6. Acquisitions On May 31, 2017, the Company acquired all the outstanding shares of Crisp, a mobile marketing and advertising company, delivering shopper marketing media campaigns for CPGs and retailers. Crisp’s mobile media expertise complements Quotient’s proprietary shopper data, retail network and existing promotions and media offerings. The total preliminary acquisition consideration of $51.9 million consisted of $24.1 million in cash, 1,177,927 shares of the Company’s common stock with a fair value of $13.0 million or $11.00 per share, and contingent consideration of up to $24.5 million payable in cash with a fair value of $14.8 million. The contingent consideration payout is based on Crisp achieving certain financial metrics over a period of one year after closing and is payable within 105 days after May 31, 2018. At the date of acquisition, the contingent consideration’s fair value of $14.8 million was determined by using an option pricing method. Fair value of contingent consideration is remeasured every reporting period. Refer to Note 3 for the fair value of contingent consideration at September 30, 2017. The Crisp acquisition provides the Company with customer relationships, developed technologies and trade names. The fair value of the customer relationships intangible asset was determined by using a discounted cash flow model. The fair values of developed technologies and trade names intangible assets were determined by using the relief from royalty methods. 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 Crisp’s knowhow. The transaction was accounted for as a business combination. Accordingly, assets acquired and liabilities assumed were recorded at their estimated fair values as of the acquisition date. The Company expensed all transaction costs in the period in which they were incurred. The following table summarizes the preliminary acquisition consideration and the related fair values of the assets acquired and liabilities assumed (in thousands): Purchase Consideration Net Tangible Assets Acquired/ (Liabilities Assumed) Identifiable Intangible Assets Goodwill Goodwill Deductible for Taxes (1) Acquisition Related Expenses Crisp $ 51,904 $ 5,893 $ 9,400 $ 36,611 Not $ 1,504 (1) Expensed as general and administrative The following sets forth each component of identifiable intangible assets acquired in connection with the Crisp acquisition (in thousands): Crisp Estimated Useful Life (in Years) Developed technologies $ 5,000 4.0 Customer relationships 2,800 7.0 Trade names 1,600 4.0 Total identifiable intangible assets $ 9,400

Intangible Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	7. Intangible Assets Intangible assets consist of the following (in thousands): September 30, 2017 Gross Accumulated Amortization Foreign Currency Translation Net Weighted Average Amortization Period (Years) Promotion service rights $ 22,492 $ (3,497 ) $ — $ 18,995 6.3 Data access rights 10,801 (2,192 ) — 8,609 4.6 Customer relationships 11,660 (6,069 ) (36 ) 5,555 4.4 Developed technologies 12,187 (4,268 ) (89 ) 7,830 3.2 Media service rights 6,383 (1,295 ) — 5,088 4.6 Domain names 5,949 (4,525 ) (9 ) 1,415 1.5 Trade names 1,767 (302 ) 1 1,466 3.7 Patents 975 (757 ) — 218 4.8 Vendor relationships 890 (834 ) — 56 0.3 Registered users 420 (195 ) (11 ) 214 2.5 $ 73,524 $ (23,934 ) $ (144 ) $ 49,446 4.9 As of September 30, 2017, and December 31, 2016, the Company has a domain name with a gross value of $0.4 million with an indefinite useful life that is not subject to amortization. December 31, 2016 Gross Accumulated Amortization Foreign Currency Translation Net Weighted Average Amortization Period (Years) Promotion service rights $ 22,492 $ (1,256 ) $ — $ 21,236 7.1 Data access rights 10,801 (787 ) — 10,014 5.3 Customer relationships 8,860 (4,915 ) (36 ) 3,909 3.1 Developed technologies 7,187 (2,837 ) (89 ) 4,261 3.3 Media service rights 6,383 (465 ) — 5,918 5.3 Domain names 5,948 (4,061 ) (9 ) 1,878 2.2 Patents 975 (718 ) — 257 5.6 Vendor relationships 890 (667 ) — 223 1.0 Registered users 420 (118 ) (11 ) 291 3.3 Trade names 167 (168 ) 1 — — $ 64,123 $ (15,992 ) $ (144 ) $ 47,987 5.6 Amortization expense related to intangible assets subject to amortization was $2.9 million and $2.1 million during the three months ended September 30, 2017 and 2016, respectively, and $7.9 million and $4.3 million during the nine months ended September 30, 2017 and 2016, respectively. Estimated future amortization expense related to intangible assets as of September 30, 2017 is as follows (in thousands): Total 2017, remaining three months $ 2,955 2018 11,467 2019 10,379 2020 8,962 2021 7,104 2022 and beyond 8,226 Total estimated amortization expense $ 49,093

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	8. 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”). 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. Stock Options The fair value of each option was estimated on the date of grant for the period presented using the following assumptions: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Expected life (in years) 6.25 6.08 5.50 - 6.25 2.50 - 6.08 Risk-free interest rate 1.98% 1.22% 1.87% - 2.14% 0.68% - 1.34% Volatility 50% 55% 50% 55% - 70% Dividend yield — — — — The weighted-average grant-date fair value of options granted was $5.81 and $6.87 per share during the three months ended September 30, 2017 and 2016, respectively, and $6.33 and $5.25 per share during the nine months ended September 30, 2017 and 2016, respectively. Restricted Stock Units The fair value of restricted stock units (“RSUs”) equals the market value of the Company’s common stock on the date of the grant. The RSUs are excluded from issued and outstanding shares until they are vested. On September 28, 2017 (the “Grant Date”), the Company granted 128,205 performance-based RSUs (“PSU Award”), under the 2013 Equity Incentive Plan, to Mir Aamir, in connection with his promotion to President and Chief Executive Officer. The PSU Award represents the right to receive shares of the Company’s common stock upon meeting certain vesting conditions which were tied to achievement of certain Company stock price goals. The fair value of the PSU Award was measured using a Monte Carlo simulation. During the three months ended September 30, 2017, the expense recognized in the consolidated financial statements related to the PSU Award was insignificant. Subsequent to September 30, 2017, the Company modified the terms of the PSU Award to provide incentives based on targets that can be directly tied to the Company’s performance. Refer to Part II – Other Information, Item 5. for further details. A summary of the Company’s stock option and RSU award activity under the 2013 Plan is as follows: RSUs Outstanding Options Outstanding Shares Available for Grant Number of Shares Weighted Average Grant Date Fair Value Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (in thousands) Balance as of December 31, 2016 3,424,730 5,504,084 $ 12.02 7,746,067 $ 8.83 6.12 $ 30,507 Increase in shares authorized 3,542,416 — — — — — — Options granted (1,319,680 ) — — 1,319,680 $ 12.76 — — Options exercised — — — (1,262,802 ) $ 4.01 — $ 9,683 Options canceled or expired 184,359 — — (184,359 ) $ 9.86 — — RSUs granted (2,401,441 ) 2,401,441 $ 11.95 — — — — RSUs vested — (1,774,008 ) $ 12.49 — — — — RSUs canceled or expired 684,840 (684,840 ) $ 11.45 — — — — RSUs withheld for taxes 178,748 — — — — — — Balance as of September 30, 2017 4,293,972 5,446,677 $ 12.12 7,618,586 $ 10.29 6.41 $ 48,718 Vested and exercisable as of September 30, 2017 5,279,392 $ 9.80 5.33 $ 38,421 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 options which vested was $1.5 million and $0.9 million during the three months ended September 30, 2017 and 2016, respectively, and $5.5 million and $2.4 million during the nine months ended September 30, 2017 and 2016, respectively. Employee Stock Purchase Plan Eligible employees can enroll and elect to contribute up to 15% of their base compensation through payroll withholdings in each offering period which is six months in duration, subject to certain limitations. The fair value of the option feature is estimated using the Black-Scholes model for the period presented based on the following assumptions: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Expected life (in years) 0.50 0.50 0.50 0.50 Risk-free interest rate 1.04% 0.38% 0.62% - 1.04% 0.33% - 0.38% Volatility 50% 74% 50% 72% - 74% Dividend yield — — — — As of September 30, 2017, a total of 642,124 shares of common stock were issued under the 2013 Employee Stock Purchase Plan (“ESPP”), since inception of the plan. As of September 30, 2017, a total of 1,757,876 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 condensed consolidated statements of operations (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Cost of revenues $ 521 $ 467 $ 1,457 $ 1,457 Sales and marketing 1,832 1,155 4,858 4,279 Research and development 1,894 1,837 5,890 5,728 General and administrative 4,233 3,269 12,097 10,183 Total stock-based compensation expense $ 8,480 $ 6,728 $ 24,302 $ 21,647 As of September 30, 2017, there was $62.9 million of unrecognized stock-based compensation expense, of which $12.2 million is related to stock options and ESPP shares and $50.7 million is related to RSUs. The total unrecognized stock-based compensation expense related to stock options and ESPP as of September 30, 2017 will be amortized over a weighted-average period of 2.7 years. The total unrecognized stock-based compensation expense related to RSUs as of September 30, 2017 will be amortized over a weighted-average period of 2.4 years. During the three and nine months ended September 30, 2017, the Company capitalized $0.2 million of stock-based compensation cost in projects in process as part of property and equipment, net on the accompanying consolidated balance sheets.

Common Stock Repurchase Program

Common Stock Repurchase Program	9 Months Ended
	Sep. 30, 2017
Common Stock Repurchase Program [Abstract]
Common Stock Repurchase Program	9. Common Stock Repurchase Program The Company’s Board of Directors has approved programs for it to repurchase shares of its common stock. In April 2017, the Board of Directors authorized a share repurchase program (“2017 Program”) for the Company to repurchase up to $50.0 million of its common stock. The 2017 Program has a one year duration beginning on May 5, 2017. Stock repurchases may be made from time-to-time and the timing of any repurchases and the actual number of shares repurchased will depend on a variety of factors. The Company may suspend, modify or terminate this repurchase program at any time without prior notice. Subsequent to September 30, 2017, the Board of Directors authorized the retirement of 9,647,708 shares of the Company’s treasury stock.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	10. Income Taxes The Company recorded an income tax benefit of $0.1 million and an income tax provision $0.1 million during the three and nine months ended September 30, 2017, respectively, and an income tax provision of $0.1 million and $0.2 million during the three and nine months ended September 30, 2016, respectively. The income tax benefit for the three months ended September 30, 2017 was primarily attributable to a net decrease in foreign profits. The income tax provision for the nine months ended September 30, 2017 was primarily attributable to foreign income taxed at non-US tax rates. The income tax provision for the three and nine months ended September 30, 2016 was primarily attributable to a net increase in deferred tax liabilities associated with the change in fair value of contingent consideration related to an acquisition and a decrease in foreign income taxed at non-US tax rates.

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Net Loss Per Share	11. Net Loss Per Share The computation of the Company’s basic and diluted net loss per share is as follows (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net loss $ (10,827 ) $ (11,312 ) $ (19,259 ) $ (23,013 ) Weighted-average number of common shares used in computing net loss per share, basic and diluted 90,492 84,732 89,000 83,484 Net loss per share, basic and diluted $ (0.12 ) $ (0.13 ) $ (0.22 ) $ (0.28 ) The outstanding common equivalent shares excluded from the computation of the diluted net loss per share for the periods presented because including them would have been antidilutive are as follows (in thousands): Three and Nine Months Ended September 30, 2017 2016 Stock options and ESPP 7,770 8,287 Restricted stock units 5,447 6,017 Shares held in escrow 2,000 2,000 15,217 16,304

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Leases As of September 30, 2017, the Company’s minimum payments under its non-cancelable operating and capital leases are as follows (in thousands): Operating Leases Capital Leases 2017, remaining three months $ 1,125 $ 12 2018 4,787 42 2019 4,506 10 2020 2,176 — 2021 805 — 2022 825 — 2023 and thereafter 1,327 — Total minimum payments $ 15,551 $ 64 Less: Amount representing interest 2 Present value of capital lease obligations 62 Less: Current portion 46 Capital lease obligation, net of current portion $ 16 The Company leases various office facilities, including its corporate headquarters in Mountain View, California and various sales offices, under non-cancelable operating lease agreements that expire through December 2024. In the first quarter of 2016, the Company entered into a lease agreement for an office facility located in Cincinnati, Ohio which will expire in June 2024. The terms of the lease agreements provide for rental payments on a graduated basis. The Company recognizes rent expense on a straight-line basis over the lease periods. Additionally, the Company leases certain equipment under non-cancelable operating leases at its facilities and its leased data center operations. Rent expense pursuant to all operating lease agreements Purchase Obligations The Company has unconditional purchase commitments which expire through 2034 in the amount of $6.5 million for marketing arrangements relating to the purchase of a 20-year suite license for a professional sports team which it uses for sales and marketing purposes. The Company also has unconditional purchase commitments, primarily related to software license fees and marketing services, of $5.7 million as of September 30, 2017. Promissory Note In January 2017, the Company entered into a promissory note agreement with a lender to finance the purchase of computer equipment for $0.8 million to be paid in quarterly installments over three years. As of September 30, 2017, the Company had a remaining balance of $0.7 million under the agreement, which is included in other current liabilities and other non-current liabilities on the condensed 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 including retailers. 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 or 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 records 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 existing claims are remote, therefore the Company has not recorded any accrual for claims as of September 30, 2017 and December 31, 2016. The Company expenses legal fees in the period in which they are incurred.

Employee Benefit Plan

Employee Benefit Plan	9 Months Ended
	Sep. 30, 2017
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]
Employee Benefit Plan	13. Employee Benefit Plan The Company maintains a defined-contribution plan 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 over four years of continuous employment. The Company’s matching contribution expense was $0.4 million and $0.3 million during the three months ended September 30, 2017 and 2016, respectively, and $1.3 million and $1.4 million during the nine months ended September 30, 2017 and 2016, respectively.

Information About Geographic Ar

Information About Geographic Areas	9 Months Ended
	Sep. 30, 2017
Segments Geographical Areas [Abstract]
Information About Geographic Areas	14. 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 condensed consolidated financial statements taken as a whole.

Summary of Significant Accoun21

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. The Company’s condensed 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. The accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year ending December 31, 2017 or for any other period. There have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K that have had a material impact on its condensed consolidated financial statements and related notes, except for Company electing to change its accounting policy to account for forfeitures as they occur. The change was applied on a modified retrospective basis with a cumulative effect adjustment of $3.4 million recorded to accumulated deficit balance as of January 1, 2017.
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 amounts reported and disclosed in the Company’s condensed consolidated financial statements and accompanying notes. Such management estimates include, but are not limited to, revenue recognition, collectability of accounts receivable, recoverability of non-refundable distribution fees, the valuation and useful lives of intangible assets and property and equipment, goodwill, stock-based compensation, contingent consideration and income taxes. Actual results may differ from the Company’s estimates, and such differences may be material to the accompanying condensed consolidated financial statements.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Accounting Pronouncements Not Yet Adopted In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606). Early adoption is permitted, but not before the original effective date of the amendment, which was the first quarter of 2017. The Company is continuing to evaluate the overall impact of the new standard on its accounting policies, processes, system requirements, and internal controls over financial reporting. In addition to internal resources, the Company engaged third-party service providers to assist with the evaluation. The Company has made and will continue to make investments in systems to enable timely and accurate reporting under the new standard. The Company currently anticipates adopting the standard using the modified retrospective method. While the Company is still in the process of completing its analysis on the impact the guidance will have on its consolidated financial statements, related disclosures, and internal controls over financial reporting, it does not expect the impact to be material. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows Classification of Certain Cash Receipts and Cash Payments Accounting Pronouncements Adopted In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . The guidance requires all of the tax effects related to share based payments to be recorded through the income statement. The guidance also removes the present requirement to delay recognition of an excess tax benefit (“windfall tax benefit”) until it reduces current taxes payable; instead it is recognized at the time of settlement, subject to normal valuation allowance consideration. While the simplification will eliminate some administrative complexities, it will increase the volatility of income tax expense. The standard was effective for the Company beginning January 1, 2017, and interim periods within that reporting period. Early adoption was permitted. The Company adopted ASU 2016-09 in the first quarter of 2017. Upon adoption, the Company elected to change its accounting policy to account for forfeitures as they occur. The change was applied on a modified retrospective basis with a cumulative effect adjustment of $3.4 million recorded to accumulated deficit balance as of January 1, 2017. The amendments related to accounting for previously unrecognized excess tax benefits as deferred tax assets have been adopted on a modified retrospective basis with a cumulative-effect adjustment to opening retained earnings of $25.5 million, fully offset by a valuation allowance. This adjustment resulted in no impact to retained earnings upon adoption. The amendments related to accounting for excess tax benefits have been adopted prospectively, resulting in no impact as the Company is in a net operating loss position with a full valuation allowance.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities 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): September 30, 2017 Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents: Money market funds $ 25,068 — — $ 25,068 Certificate of deposit — 35,092 — 35,092 Short-Term investments: Certificate of deposit — 24,607 — 24,607 Total $ 25,068 $ 59,699 $ — $ 84,767 Liabilities: Contingent consideration related to Crisp acquisition (1) — — 16,200 16,200 Contingent consideration related to Shopmium acquisition (1) — — — — Total $ — $ — $ 16,200 $ 16,200 December 31, 2016 Level 1 Level 2 Level 3 Total Assets: Short-Term investments: Certificate of deposit — 69,172 — 69,172 Total $ — $ 69,172 $ — $ 69,172 Liabilities: Contingent consideration related to Shopmium acquisition (1) — — 185 185 Total $ — $ — $ 185 $ 185 (1) Included in contingent consideration related to acquisitions
Summary of Changes in Contingent Consideration	The following table represents the change in the contingent consideration (in thousands): Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 Shopmium Crisp Shopmium Crisp Level 3 Level 3 Level 3 Level 3 Balance at the beginning of period $ — $ 14,800 $ 185 $ — Addition related to acquisition — — — 14,800 Change in fair value — 1,400 (185 ) 1,400 Balance as of September 30, 2017 $ — $ 16,200 $ — $ 16,200

Allowance for Doubtful Accoun23

Allowance for Doubtful Accounts (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Summary of Activity in Allowance for Doubtful Accounts	The summary of activity in the allowance for doubtful accounts is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance at the beginning of period $ 1,035 $ 883 $ 1,338 $ 833 Additions related to Crisp acquisition — — 229 — Bad debt expense (recovery) (51 ) 86 (548 ) 237 Write-offs, net (71 ) (38 ) (106 ) (139 ) Balance at the end of period $ 913 $ 931 $ 913 $ 931

Balance Sheet Components (Table

Balance Sheet Components (Tables)	9 Months Ended
	Sep. 30, 2017
Balance Sheet Related Disclosures [Abstract]
Property and Equipment, Net	Property and equipment consist of the following (in thousands): September 30, 2017 December 31, 2016 Software $ 32,803 $ 32,286 Computer equipment 24,133 22,664 Leasehold improvements 8,187 8,141 Furniture and fixtures 2,354 2,296 Total 67,477 65,387 Accumulated depreciation and amortization (55,493 ) (50,249 ) Projects in process 3,654 1,238 Property and equipment, net $ 15,638 $ 16,376
Accrued Compensation and Benefits	Accrued compensation and benefits consist of the following (in thousands): September 30, 2017 December 31, 2016 Bonus $ 5,164 $ 5,985 Commissions 2,549 3,572 Vacation 1,380 1,916 Payroll and related expenses 2,718 1,729 Accrued compensation and benefits $ 11,811 $ 13,202
Other Current Liabilities	Other current liabilities consist of the following (in thousands): September 30, 2017 December 31, 2016 Distribution fees $ 16,633 $ 12,463 Marketing expenses 1,915 3,383 Prefunded Liability 1,890 1,345 Traffic Acquisition Cost 1,747 — Other 6,654 3,673 Other current liabilities $ 28,839 $ 20,864

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Summary of Preliminary Acquisition Consideration and the Related Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary acquisition consideration and the related fair values of the assets acquired and liabilities assumed (in thousands): Purchase Consideration Net Tangible Assets Acquired/ (Liabilities Assumed) Identifiable Intangible Assets Goodwill Goodwill Deductible for Taxes (1) Acquisition Related Expenses Crisp $ 51,904 $ 5,893 $ 9,400 $ 36,611 Not $ 1,504 (1) Expensed as general and administrative
Component of Identifiable Intangible Assets	The following sets forth each component of identifiable intangible assets acquired in connection with the Crisp acquisition (in thousands): Crisp Estimated Useful Life (in Years) Developed technologies $ 5,000 4.0 Customer relationships 2,800 7.0 Trade names 1,600 4.0 Total identifiable intangible assets $ 9,400

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible assets consist of the following (in thousands): September 30, 2017 Gross Accumulated Amortization Foreign Currency Translation Net Weighted Average Amortization Period (Years) Promotion service rights $ 22,492 $ (3,497 ) $ — $ 18,995 6.3 Data access rights 10,801 (2,192 ) — 8,609 4.6 Customer relationships 11,660 (6,069 ) (36 ) 5,555 4.4 Developed technologies 12,187 (4,268 ) (89 ) 7,830 3.2 Media service rights 6,383 (1,295 ) — 5,088 4.6 Domain names 5,949 (4,525 ) (9 ) 1,415 1.5 Trade names 1,767 (302 ) 1 1,466 3.7 Patents 975 (757 ) — 218 4.8 Vendor relationships 890 (834 ) — 56 0.3 Registered users 420 (195 ) (11 ) 214 2.5 $ 73,524 $ (23,934 ) $ (144 ) $ 49,446 4.9 As of September 30, 2017, and December 31, 2016, the Company has a domain name with a gross value of $0.4 million with an indefinite useful life that is not subject to amortization. December 31, 2016 Gross Accumulated Amortization Foreign Currency Translation Net Weighted Average Amortization Period (Years) Promotion service rights $ 22,492 $ (1,256 ) $ — $ 21,236 7.1 Data access rights 10,801 (787 ) — 10,014 5.3 Customer relationships 8,860 (4,915 ) (36 ) 3,909 3.1 Developed technologies 7,187 (2,837 ) (89 ) 4,261 3.3 Media service rights 6,383 (465 ) — 5,918 5.3 Domain names 5,948 (4,061 ) (9 ) 1,878 2.2 Patents 975 (718 ) — 257 5.6 Vendor relationships 890 (667 ) — 223 1.0 Registered users 420 (118 ) (11 ) 291 3.3 Trade names 167 (168 ) 1 — — $ 64,123 $ (15,992 ) $ (144 ) $ 47,987 5.6
Estimated Amortization of Intangible Assets	Estimated future amortization expense related to intangible assets as of September 30, 2017 is as follows (in thousands): Total 2017, remaining three months $ 2,955 2018 11,467 2019 10,379 2020 8,962 2021 7,104 2022 and beyond 8,226 Total estimated amortization expense $ 49,093

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
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 period presented using the following assumptions: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Expected life (in years) 6.25 6.08 5.50 - 6.25 2.50 - 6.08 Risk-free interest rate 1.98% 1.22% 1.87% - 2.14% 0.68% - 1.34% Volatility 50% 55% 50% 55% - 70% Dividend yield — — — —
Summary of Stock Option and Restricted Stock Units Award Activity	A summary of the Company’s stock option and RSU award activity under the 2013 Plan is as follows: RSUs Outstanding Options Outstanding Shares Available for Grant Number of Shares Weighted Average Grant Date Fair Value Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (in thousands) Balance as of December 31, 2016 3,424,730 5,504,084 $ 12.02 7,746,067 $ 8.83 6.12 $ 30,507 Increase in shares authorized 3,542,416 — — — — — — Options granted (1,319,680 ) — — 1,319,680 $ 12.76 — — Options exercised — — — (1,262,802 ) $ 4.01 — $ 9,683 Options canceled or expired 184,359 — — (184,359 ) $ 9.86 — — RSUs granted (2,401,441 ) 2,401,441 $ 11.95 — — — — RSUs vested — (1,774,008 ) $ 12.49 — — — — RSUs canceled or expired 684,840 (684,840 ) $ 11.45 — — — — RSUs withheld for taxes 178,748 — — — — — — Balance as of September 30, 2017 4,293,972 5,446,677 $ 12.12 7,618,586 $ 10.29 6.41 $ 48,718 Vested and exercisable as of September 30, 2017 5,279,392 $ 9.80 5.33 $ 38,421
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: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Expected life (in years) 0.50 0.50 0.50 0.50 Risk-free interest rate 1.04% 0.38% 0.62% - 1.04% 0.33% - 0.38% Volatility 50% 74% 50% 72% - 74% 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 condensed consolidated statements of operations (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Cost of revenues $ 521 $ 467 $ 1,457 $ 1,457 Sales and marketing 1,832 1,155 4,858 4,279 Research and development 1,894 1,837 5,890 5,728 General and administrative 4,233 3,269 12,097 10,183 Total stock-based compensation expense $ 8,480 $ 6,728 $ 24,302 $ 21,647

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Net Loss Per Share	The computation of the Company’s basic and diluted net loss per share is as follows (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net loss $ (10,827 ) $ (11,312 ) $ (19,259 ) $ (23,013 ) Weighted-average number of common shares used in computing net loss per share, basic and diluted 90,492 84,732 89,000 83,484 Net loss per share, basic and diluted $ (0.12 ) $ (0.13 ) $ (0.22 ) $ (0.28 )
Schedule of Outstanding Common Equivalent Shares Excluded from Computation of Diluted Net Loss Per Share	The outstanding common equivalent shares excluded from the computation of the diluted net loss per share for the periods presented because including them would have been antidilutive are as follows (in thousands): Three and Nine Months Ended September 30, 2017 2016 Stock options and ESPP 7,770 8,287 Restricted stock units 5,447 6,017 Shares held in escrow 2,000 2,000 15,217 16,304

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments And Contingencies Disclosure [Abstract]
Minimum Payments Under Non-cancelable Operating and Capital Leases	As of September 30, 2017, the Company’s minimum payments under its non-cancelable operating and capital leases are as follows (in thousands): Operating Leases Capital Leases 2017, remaining three months $ 1,125 $ 12 2018 4,787 42 2019 4,506 10 2020 2,176 — 2021 805 — 2022 825 — 2023 and thereafter 1,327 — Total minimum payments $ 15,551 $ 64 Less: Amount representing interest 2 Present value of capital lease obligations 62 Less: Current portion 46 Capital lease obligation, net of current portion $ 16

Summary of Significant Accoun30

Summary of Significant Accounting Policies - Additional Information (Details) - ASU 2016-09 - USD ($) $ in Millions	Sep. 30, 2017	Jan. 01, 2017
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Modified retrospective basis with cumulative effect adjustment, recorded to accumulated deficit balance		$ 3.4
Retained Earnings
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Unrecognized excess tax benefits as deferred tax assets, cumulative-effect adjustment to opening retained earnings	$ 25.5

Fair Value Measurements - Finan

Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Assets:
Assets fair value		$ 84,767	$ 69,172
Liabilities:
Liabilities fair value		16,200	185
Contingent Consideration | Shopmium Acquisition
Liabilities:
Liabilities fair value	[1]		185
Contingent Consideration | Crisp Acquisition
Liabilities:
Liabilities fair value	[1]	16,200
Cash and Cash Equivalents | Money Market Funds
Assets:
Assets fair value		25,068
Cash and Cash Equivalents | Certificates of Deposit
Assets:
Assets fair value		35,092
Short-Term Investments | Certificates of Deposit
Assets:
Assets fair value		24,607	69,172
Level 1
Assets:
Assets fair value		25,068
Level 1 | Cash and Cash Equivalents | Money Market Funds
Assets:
Assets fair value		25,068
Level 2
Assets:
Assets fair value		59,699	69,172
Level 2 | Cash and Cash Equivalents | Certificates of Deposit
Assets:
Assets fair value		35,092
Level 2 | Short-Term Investments | Certificates of Deposit
Assets:
Assets fair value		24,607	69,172
Level 3
Liabilities:
Liabilities fair value		16,200	185
Level 3 | Contingent Consideration | Shopmium Acquisition
Liabilities:
Liabilities fair value	[1]		$ 185
Level 3 | Contingent Consideration | Crisp Acquisition
Liabilities:
Liabilities fair value	[1]	$ 16,200
[1]	Included in contingent consideration related to acquisitions

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Losses from reclassification of contingent liability	$ 1,400,000		$ 1,200,000
Transfers between fair value hierarchies	$ 0	$ 0	$ 0	$ 0
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fixed net asset value	$ 1		$ 1

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Changes in Contingent Consideration (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Shopmium
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at the beginning of period		$ 185
Change in fair value		(185)
Crisp Media, Inc
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at the beginning of period	$ 14,800
Addition related to acquisition		14,800
Change in fair value	1,400	1,400
Balance as of September 30, 2017	$ 16,200	$ 16,200

Allowance for Doubtful Accoun34

Allowance for Doubtful Accounts - Summary of Activity in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accounts Notes And Loans Receivable [Line Items]
Balance at the beginning of period	$ 1,035	$ 883	$ 1,338	$ 833
Bad debt expense (recovery)	(51)	86	(548)	237
Write-offs, net	(71)	(38)	(106)	(139)
Balance at the end of period	$ 913	$ 931	913	$ 931
Crisp Acquisition
Accounts Notes And Loans Receivable [Line Items]
Additions related to Crisp acquisition			$ 229

Balance Sheet Components - Prop

Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Property and equipment, Total	$ 67,477	$ 65,387
Accumulated depreciation and amortization	(55,493)	(50,249)
Projects in process	3,654	1,238
Property and equipment, net	15,638	16,376
Software
Property Plant And Equipment [Line Items]
Property and equipment, Total	32,803	32,286
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment, Total	24,133	22,664
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, Total	8,187	8,141
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, Total	$ 2,354	$ 2,296

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Depreciation	$ 1.6	$ 4.1	$ 5.3	$ 12
Capitalized costs	1	0.3	3.1	0.4
Amortization expense	0	$ 2.6	0.6	$ 7.9
Unamortized costs	$ 3.7		$ 3.7		$ 1.2

Balance Sheet Components - Accr

Balance Sheet Components - Accrued Compensation and Benefits (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Bonus	$ 5,164	$ 5,985
Commissions	2,549	3,572
Vacation	1,380	1,916
Payroll and related expenses	2,718	1,729
Accrued compensation and benefits	$ 11,811	$ 13,202

Balance Sheet Components - Othe

Balance Sheet Components - Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Distribution fees	$ 16,633	$ 12,463
Marketing expenses	1,915	3,383
Prefunded Liability	1,890	1,345
Traffic Acquisition Cost	1,747
Other	6,654	3,673
Other current liabilities	$ 28,839	$ 20,864

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	May 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Contingent consideration, fair value		$ 185
Crisp Media, Inc
Business Acquisition [Line Items]
Total preliminary acquisition consideration	$ 51,900
Cash payments for purchase of assets	$ 24,100
Number of shares Issuable	1,177,927
Total acquisition consideration (Values)	$ 13,000
Business acquisitions, fair value of common stock per share	$ 11
Contingent consideration payable in cash	$ 24,500
Contingent consideration, fair value	$ 14,800
Contingent consideration, milestones achievement period	1 year
Contingent consideration payout period	105 days
Business combination, contingent consideration payable start date	May 31, 2018

Acquisitions - Summary of Preli

Acquisitions - Summary of Preliminary Acquisition Consideration and the Related Fair Values of Assets Acquired and Liabilities Assumed (Details) - Crisp Media, Inc $ in Thousands	May 31, 2017USD ($)
Business Acquisition [Line Items]
Purchase Consideration	$ 51,904
Net Tangible Assets Acquired/ (Liabilities Assumed)	5,893
Identifiable Intangible Assets	9,400
Goodwill	$ 36,611
Goodwill Deductible for Taxes	Not Deductible
Acquisition Related Expenses	$ 1,504

Acquisitions - Component of Ide

Acquisitions - Component of Identifiable Intangible Assets (Details) - Crisp Media, Inc $ in Thousands	May 31, 2017USD ($)
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 9,400
Developed Technologies
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 5,000
Estimated Useful Life (in Years)	4 years
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 2,800
Estimated Useful Life (in Years)	7 years
Trade Names
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 1,600
Estimated Useful Life (in Years)	4 years

Intangible Assets - Intangible

Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross	$ 73,524	$ 64,123
Accumulated Amortization	(23,934)	(15,992)
Foreign Currency Translation	(144)	(144)
Net	$ 49,446	$ 47,987
Weighted Average Amortization Period (Years)	4 years 10 months 25 days	5 years 7 months 6 days
Promotion Service Rights
Finite Lived Intangible Assets [Line Items]
Gross	$ 22,492	$ 22,492
Accumulated Amortization	(3,497)	(1,256)
Net	$ 18,995	$ 21,236
Weighted Average Amortization Period (Years)	6 years 3 months 18 days	7 years 1 month 6 days
Data Access Rights
Finite Lived Intangible Assets [Line Items]
Gross	$ 10,801	$ 10,801
Accumulated Amortization	(2,192)	(787)
Net	$ 8,609	$ 10,014
Weighted Average Amortization Period (Years)	4 years 7 months 6 days	5 years 3 months 18 days
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross	$ 11,660	$ 8,860
Accumulated Amortization	(6,069)	(4,915)
Foreign Currency Translation	(36)	(36)
Net	$ 5,555	$ 3,909
Weighted Average Amortization Period (Years)	4 years 4 months 24 days	3 years 1 month 6 days
Developed Technologies
Finite Lived Intangible Assets [Line Items]
Gross	$ 12,187	$ 7,187
Accumulated Amortization	(4,268)	(2,837)
Foreign Currency Translation	(89)	(89)
Net	$ 7,830	$ 4,261
Weighted Average Amortization Period (Years)	3 years 2 months 12 days	3 years 3 months 18 days
Media Service Rights
Finite Lived Intangible Assets [Line Items]
Gross	$ 6,383	$ 6,383
Accumulated Amortization	(1,295)	(465)
Net	$ 5,088	$ 5,918
Weighted Average Amortization Period (Years)	4 years 7 months 6 days	5 years 3 months 18 days
Domain Names
Finite Lived Intangible Assets [Line Items]
Gross	$ 5,949	$ 5,948
Accumulated Amortization	(4,525)	(4,061)
Foreign Currency Translation	(9)	(9)
Net	$ 1,415	$ 1,878
Weighted Average Amortization Period (Years)	1 year 6 months	2 years 2 months 12 days
Patents
Finite Lived Intangible Assets [Line Items]
Gross	$ 975	$ 975
Accumulated Amortization	(757)	(718)
Net	$ 218	$ 257
Weighted Average Amortization Period (Years)	4 years 9 months 18 days	5 years 7 months 6 days
Vendor Relationships
Finite Lived Intangible Assets [Line Items]
Gross	$ 890	$ 890
Accumulated Amortization	(834)	(667)
Net	$ 56	$ 223
Weighted Average Amortization Period (Years)	3 months 19 days	1 year
Registered Users
Finite Lived Intangible Assets [Line Items]
Gross	$ 420	$ 420
Accumulated Amortization	(195)	(118)
Foreign Currency Translation	(11)	(11)
Net	$ 214	$ 291
Weighted Average Amortization Period (Years)	2 years 6 months	3 years 3 months 18 days
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross	$ 1,767	$ 167
Accumulated Amortization	(302)	(168)
Foreign Currency Translation	1	$ 1
Net	$ 1,466
Weighted Average Amortization Period (Years)	3 years 8 months 12 days

Intangible Assets - Additional

Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 2.9	$ 2.1	$ 7.9	$ 4.3
Domain Names
Intangible Assets [Line Items]
Indefinite lived intangible, gross value	$ 0.4		$ 0.4		$ 0.4

Intangible Assets - Estimated A

Intangible Assets - Estimated Amortization of Intangible Assets (Details) $ in Thousands	Sep. 30, 2017USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2017, remaining three months	$ 2,955
2,018	11,467
2,019	10,379
2,020	8,962
2,021	7,104
2022 and beyond	8,226
Total estimated amortization expense	$ 49,093

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Assumptions Used to Estimate the Fair Value of Stock Options and Employee Stock Purchase Plan (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)	6 months	6 months	6 months	6 months
Risk-free interest rate	1.04%	0.38%
Volatility	50.00%	74.00%	50.00%
Minimum | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate			0.62%	0.33%
Volatility				72.00%
Maximum | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate			1.04%	0.38%
Volatility				74.00%
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)	6 years 3 months	6 years 30 days
Risk-free interest rate	1.98%	1.22%
Risk-free interest rate, minimum			1.87%	0.68%
Risk-free interest rate, maximum			2.14%	1.34%
Volatility	50.00%	55.00%	50.00%
Volatility, minimum				55.00%
Volatility, maximum				70.00%
Stock Options | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)			5 years 6 months	2 years 5 months 30 days
Stock Options | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)			6 years 3 months	6 years 30 days

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 30, 2017	Sep. 28, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value			$ 5.81	$ 6.87	$ 6.33	$ 5.25
RSUs granted					2,401,441
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	642,124
Shares available for issuance	1,757,876		1,757,876		1,757,876
Stock-based compensation			$ 8,480	$ 6,728	$ 24,302	$ 21,647
Property and Equipment
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation			200		$ 200
PSU Award
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs granted		128,205
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs granted					2,401,441
Fair value of options vested, total			1,500	$ 900	$ 5,500	$ 2,400
Unrecognized stock based compensation	$ 50,700		50,700		$ 50,700
Unrecognized stock based compensation, amortized weighted average period					2 years 4 months 25 days
Stock Based Compensation Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock based compensation	62,900		62,900		$ 62,900
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock based compensation	$ 12,200		$ 12,200		$ 12,200
Unrecognized stock based compensation, amortized weighted average period					2 years 8 months 13 days

Stock-Based Compensation - Su47

Stock-Based Compensation - Summary of Stock Option and Restricted Stock Units Award Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Shares Available for Grant
Beginning balance	3,424,730
Increase in shares authorized	3,542,416
Options granted	(1,319,680)
Options canceled or expired	184,359
RSUs granted	(2,401,441)
RSUs canceled or expired	684,840
RSUs withheld for taxes	178,748
Ending balance	4,293,972	3,424,730
Number of Shares
Beginning balance	7,746,067
Options granted	1,319,680
Options exercised	(1,262,802)
Options canceled or expired	(184,359)
Ending balance	7,618,586	7,746,067
Vested and exercisable at the end of period	5,279,392
Weighted Average Exercise Price
Beginning balance	$ 8.83
Options granted	12.76
Options exercised	4.01
Options canceled or expired	9.86
Ending balance	10.29	$ 8.83
Vested and exercisable at the end of period	$ 9.80
Weighted Average Remaining Contractual Term (Years) / Aggregate Intrinsic Value
Weighted Average Remaining Contractual Term (Years)	6 years 4 months 28 days	6 years 1 month 13 days
Vested and exercisable at the end of period	5 years 4 months
Aggregate Intrinsic Value, Beginning balance	$ 30,507
Aggregate Intrinsic Value, Options exercised	9,683
Aggregate Intrinsic Value, Ending balance	48,718	$ 30,507
Vested and exercisable at the end of period	$ 38,421
Restricted Stock Units, Number of Shares
RSUs granted	2,401,441
RSUs canceled or expired	(684,840)
Restricted Stock Units
Shares Available for Grant
RSUs granted	(2,401,441)
RSUs vested	1,774,008
RSUs canceled or expired	684,840
Restricted Stock Units, Number of Shares
Beginning balance	5,504,084
RSUs granted	2,401,441
RSUs vested	(1,774,008)
RSUs canceled or expired	(684,840)
Ending balance	5,446,677	5,504,084
Weighted Average Grant Date Fair Value
Beginning Balance	$ 12.02
RSUs granted	11.95
RSUs vested	12.49
RSUs canceled or expired	11.45
Ending balance	$ 12.12	$ 12.02

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	$ 8,480	$ 6,728	$ 24,302	$ 21,647
Cost of Revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	521	467	1,457	1,457
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	1,832	1,155	4,858	4,279
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	1,894	1,837	5,890	5,728
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation	$ 4,233	$ 3,269	$ 12,097	$ 10,183

Common Stock Repurchase Progr49

Common Stock Repurchase Program - Additional Information (Details) - USD ($)	Nov. 02, 2017	Apr. 30, 2017	Sep. 30, 2017
Subsequent Event
Common Stock Repurchases [Line Items]
Retirement of treasury stock	9,647,708
Share Repurchase Program ("2017 Program")
Common Stock Repurchases [Line Items]
Stock repurchase program duration		1 year
Share repurchase program, beginning date		May 5, 2017
Number of shares repurchased			0
Remaining amount available for future share repurchases			$ 50,000,000
Share Repurchase Program ("2017 Program") | Maximum
Common Stock Repurchases [Line Items]
Repurchase of authorized common stock		$ 50,000,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Provision for (benefit from) income taxes	$ (107)	$ 79	$ 66	$ 193

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net loss	$ (10,827)	$ (11,312)	$ (19,259)	$ (23,013)
Weighted-average number of common shares used in computing net loss per share, basic and diluted	90,492	84,732	89,000	83,484
Net loss per share, basic and diluted	$ (0.12)	$ (0.13)	$ (0.22)	$ (0.28)

Net Loss Per Share - Schedule52

Net Loss Per Share - Schedule of Outstanding Common Equivalent Shares Excluded from Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares	15,217	16,304	15,217	16,304
Stock Options and ESPP
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares	7,770	8,287	7,770	8,287
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares	5,447	6,017	5,447	6,017
Shares Held in Escrow
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Outstanding common equivalent shares	2,000	2,000	2,000	2,000

Commitments and Contingencies -

Commitments and Contingencies - Minimum Payments Under Non-Cancelable Operating and Capital Leases (Details) $ in Thousands	Sep. 30, 2017USD ($)
Operating Leases
2017, remaining three months	$ 1,125
2,018	4,787
2,019	4,506
2,020	2,176
2,021	805
2,022	825
2023 and thereafter	1,327
Total minimum payments	15,551
Capital Leases
2017, remaining three months	12
2,018	42
2,019	10
Total minimum payments	64
Less: Amount representing interest	2
Present value of capital lease obligations	62
Less: Current portion	46
Capital lease obligation, net of current portion	$ 16

Commitments and Contingencies54

Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Commitments And Contingencies [Line Items]
Non-cancelable operating lease agreements expiration				2024-12
Rent expense		$ 1,100,000	$ 1,300,000	$ 3,300,000	$ 3,200,000
Computer Equipment | Promissory Note
Commitments And Contingencies [Line Items]
Debt instrument, used to finance	$ 800,000
Debt instrument, frequency of payment				quarterly
Debt instrument, maturity period	3 years
Debt instrument, remaining amount		700,000		$ 700,000
Marketing Arrangements
Commitments And Contingencies [Line Items]
Unconditional purchase commitments		$ 6,500,000		$ 6,500,000
Unconditional purchase commitment year				2,034
Unconditional purchase commitment term				20 years
Open Purchase Commitments
Commitments And Contingencies [Line Items]
Software license fees and marketing services				$ 5,700,000
Ohio
Commitments And Contingencies [Line Items]
Non-cancelable operating lease agreements expiration				2024-06

Employee Benefit Plan - Additio

Employee Benefit Plan - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
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	$ 400,000	$ 300,000	$ 1,300,000	$ 1,400,000