MaxPoint Interactive (MXPT) 10-Q 14 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 02, 2017
Document And Entity Information
Entity Registrant Name	MAXPOINT INTERACTIVE, INC.
Entity Central Index Key	1,611,231
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		6,764,021
Entity Current Reporting Status	Yes

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 15,696	$ 24,221
Accounts receivable, net	30,746	43,432
Prepaid expenses and other current assets	2,394	1,477
Total current assets	48,836	69,130
Property, equipment and software, net	19,338	20,125
Other long-term assets	140	60
Total assets	68,314	89,315
Current liabilities:
Accounts payable	10,192	12,660
Accrued expenses and other current liabilities	7,040	9,400
Revolving line of credit	23,471	27,489
Total current liabilities	40,703	49,549
Other long-term liabilities	1,085	1,218
Total liabilities	41,788	50,767
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.00005 par value; 500,000,000 shares authorized, 6,632,889 and 6,764,021 shares issued and outstanding as of December 31, 2016 and June 30, 2017, respectively	1	1
Additional paid-in capital	110,110	107,898
Accumulated other comprehensive loss	(169)	(200)
Accumulated deficit	(83,416)	(69,151)
Total stockholders’ equity	26,526	38,548
Total liabilities and stockholders’ equity	$ 68,314	$ 89,315

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
Common stock
Common shares par value (in usd per share)	$ 0.00005	$ 0.00005
Common shares authorized	500,000,000	500,000,000
Common shares issued	6,764,021	6,632,889
Common shares outstanding	6,764,021	6,632,889

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue	$ 32,847	$ 35,939	$ 60,700	$ 65,389
Traffic acquisition costs	9,444	12,775	18,243	22,863
Other cost of revenue	5,398	4,932	10,074	9,575
Gross profit	18,005	18,232	32,383	32,951
Operating expenses:
Sales and marketing	12,483	13,205	24,866	26,554
Research and development	6,367	7,081	12,791	13,588
General and administrative	3,982	4,383	8,594	9,701
Total operating expenses	22,832	24,669	46,251	49,843
Loss from operations	(4,827)	(6,437)	(13,868)	(16,892)
Other expense (income):
Interest expense	186	236	358	500
Interest income	0	0	0	(3)
Amortization of deferred financing costs	21	10	39	28
Total other expense	207	246	397	525
Loss before income taxes	(5,034)	(6,683)	(14,265)	(17,417)
Provision for income taxes	0	0	0	0
Net loss	$ (5,034)	$ (6,683)	$ (14,265)	$ (17,417)
Net loss per basic and diluted share of common stock (in usd per share)	$ (0.75)	$ (1.02)	$ (2.13)	$ (2.65)
Weighted-average shares used to compute net loss per basic and diluted share of common stock	6,734,408	6,581,722	6,689,192	6,573,467

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,034)	$ (6,683)	$ (14,265)	$ (17,417)
Other comprehensive (loss) income:
Foreign currency translation adjustments	26	(53)	31	(75)
Comprehensive loss	$ (5,008)	$ (6,736)	$ (14,234)	$ (17,492)

Condensed Consolidated Stateme6

Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance - beginning of period ( in shares) at Dec. 31, 2016	6,632,889	6,632,889
Balance - beginning of period at Dec. 31, 2016	$ 38,548	$ 1	$ 107,898	$ (200)	$ (69,151)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options ( in shares)	27,529	27,529
Exercise of stock options	$ 48		48
Issuance of common stock under employee stock purchase plan (in shares)		29,234
Issuance of common stock under employee stock purchase plan	154		154
Repurchases of common stock (in shares)		(49,101)
Repurchases of common stock	(325)		(325)
Issuance of common stock upon vesting of restricted stock units (in shares)		189,927
Issuance of common stock upon vesting of restricted stock units	0
Shares withheld related to net share settlement of restricted stock units (in shares)		(66,457)
Shares withheld related to net share settlement of restricted stock units	(458)		(458)
Stock-based compensation	2,793		2,793
Foreign currency translation adjustments	31			31
Net loss	$ (14,265)				(14,265)
Balance - end of period ( in shares) at Jun. 30, 2017	6,764,021	6,764,021
Balance - end of period at Jun. 30, 2017	$ 26,526	$ 1	$ 110,110	$ (169)	$ (83,416)

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net loss	$ (14,265)	$ (17,417)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	5,410	4,612
Stock-based compensation expense	2,400	1,778
Bad debt expense	(3)	328
Loss on disposal of asset	0	4
Amortization of deferred financing costs	39	28
Changes in operating assets and liabilities:
Accounts receivable	12,702	6,175
Prepaid expenses and other current assets	(897)	(1,312)
Security deposits	0	(20)
Accounts payable	(2,480)	(3,704)
Accrued expenses and other current liabilities	(2,371)	1,559
Other long-term liabilities	(133)	382
Net cash (used in) provided by operating activities	402	(7,587)
Cash flows from investing activities:
Purchases of property, equipment and software	(1,168)	(1,251)
Capitalized internal-use software costs	(3,043)	(3,581)
Changes to restricted cash	0	1,861
Net cash used in investing activities	(4,211)	(2,971)
Cash flows from financing activities:
Proceeds from debt	68,700	3,400
Repayment of debt	(72,718)	(7,000)
Proceeds from stock option exercises	48	73
Proceeds from issuance of common stock under employee stock purchase plan	154	202
Tax withholdings related to net share settlements of restricted stock units	(458)	0
Payments for repurchases of common stock	(325)	(125)
Payments of issuance costs related to debt	(132)	(54)
Net cash used in financing activities	(4,731)	(3,504)
Effect of exchange rate changes on cash and cash equivalents	15	(28)
Net decrease in cash and cash equivalents	(8,525)	(14,090)
Cash and cash equivalents at beginning of period	24,221	41,143
Cash and cash equivalents at end of period	15,696	27,053
Supplemental disclosures of other cash flow information:
Cash paid for interest	407	529
Supplemental disclosures of non-cash investing and financing activities:
Purchases of property, equipment and software included in accounts payable and accruals	530	336
Additions to property, equipment and software from other long-term assets	0	213
Stock-based compensation capitalized in internal-use software costs	$ 393	$ 216

Description of Business

Description of Business	6 Months Ended
	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Organization MaxPoint Interactive, Inc. (the “Company”) was incorporated in September 2006 under the state laws of Delaware. The Company is a provider of business intelligence and marketing automation services. The Company’s customers are located in the United States and Europe and consist primarily of enterprises with national brands in the consumer products, retail, automotive, financial services, healthcare, telecommunications and entertainment industries. The Company’s MaxPoint Intelligence Platform predicts the most likely local buyers of a specific product at a particular retail location and then executes cross-channel digital marketing campaigns to reach these buyers on behalf of the Company’s customers. The Company is headquartered in Morrisville, North Carolina and has offices across the United States and one in the United Kingdom. Reverse Stock Split On April 25, 2016, the Company amended its amended and restated certificate of incorporation effecting a 1-for-4 reverse stock split of its outstanding shares of capital stock. The reverse stock split did not change the number of authorized shares of capital stock of the Company or cause an adjustment to the par value of the Company’s capital stock. As a result of the reverse stock split, the Company was required to adjust the share amounts under its equity incentive plans and common stock warrant agreements with third parties. No fractional shares were issued in connection with the reverse stock split. Stockholders who would have otherwise held a fractional share of capital stock received a cash payment for any fractional share resulting from the split in an amount equal to such fraction multiplied by the closing sales price of the common stock as reported on the last trading day immediately prior to the split. All disclosures of shares and per share data in the condensed consolidated financial statements and related notes have been adjusted to reflect the reverse stock split for all periods presented. Stock Repurchase Program On March 4, 2016 , the Company’s board of directors authorized the repurchase of up to $4.0 million of the Company’s outstanding shares of common stock. As part of the share repurchase program, shares may be purchased in open market transactions, including through block purchases, through privately negotiated transactions, or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The stock repurchase program requires that the Company retire repurchased shares in accordance with Delaware corporate law and that such repurchased shares resume the status of authorized but unissued shares of common stock. The Company accounts for stock repurchases using the constructive retirement method wherein the aggregate par value of the stock is recorded to common stock and the excess of cost over par value is recorded to additional paid-in capital, subject to its pro rata portion. For each of the three and six months ended June 30, 2016 , the Company repurchased 15,197 shares under this program at a weighted-average price per share of $8.19 . For the three and six months ended June 30, 2017 , the Company repurchased 36,020 and 49,101 shares under this program at a weighted-average price per share of $6.93 and $6.62 , respectively. As of June 30, 2017 the Company had the ability to repurchase up to approximately $3.6 million of common stock under the program.

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). All intercompany accounts and transactions have been eliminated in consolidation. Basis of Presentation The condensed consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Management has evaluated whether there is substantial doubt about the entity’s ability to continue as a going concern. Substantial doubt about an entity’s ability to continue as a going concern exists when conditions and events, considered in the aggregate, indicate that it is probable that the entity will be unable to meet its obligations as they become due within one year after the date the financial statements are issued. Management’s evaluation shall be based on relevant conditions and events that are known and reasonably knowable as of that date. This evaluation initially does not take into consideration the potential mitigating effect of management’s plans that have not been fully implemented as of the date the financial statements are issued. The Company’s management has evaluated its facts and circumstances and has concluded that there are currently no matters which raise substantial doubt about its ability to continue as a going concern. As described in Note 4, on June 26, 2017 the Company extended its line of credit maturity date from March 31, 2018 to June 30, 2019 . The extension of the maturity date of this short-term debt alleviated the factor that raised substantial doubt in previous periods about the Company’s ability to continue as a going concern. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the condensed consolidated financial statements and accompanying notes. The Company evaluates its estimates, including those related to its allowance for doubtful accounts, revenue recognition, internal-use software, stock-based compensation and income taxes and related valuation allowances. The Company bases its estimates on its historical experience and on various other assumptions that it believes to be reasonable, the results of which form the basis for making judgments about the carrying value of assets and liabilities. Actual results could differ from those estimates. Unaudited Interim Condensed Consolidated Financial Information The condensed consolidated financial statements and footnotes have been prepared in accordance with GAAP as contained in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and applicable rules and regulations of the Securities and Exchange Commission’s (“SEC”) Rule 10-01 of Regulation S-X for interim financial information. In the opinion of management, the interim financial information includes all adjustments of a normal recurring nature necessary for a fair presentation of financial position, the results of operations, comprehensive loss, changes in stockholders’ equity and cash flows. The results of operations for the three and six months ended June 30, 2017 are not necessarily indicative of the results for the full year or the results for any future periods. The accompanying condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016 (“Form 10-K”). The significant accounting policies and recent accounting pronouncements were described in Note 2 to the consolidated financial statements included in the Form 10-K. There have been no significant changes in or updates to the accounting policies since December 31, 2016 , other than as described below within “Recently Adopted Accounting Pronouncements.” Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash, cash equivalents and accounts receivable. All of the Company’s cash and cash equivalents are held at financial institutions that management believes to be of high credit quality. The Company’s cash and cash equivalent accounts exceed federally insured limits. The Company has not experienced any losses on cash and cash equivalents to date. To manage accounts receivable risk, the Company evaluates and monitors the creditworthiness of its customers. As of December 31, 2016 , the Company did not have any advertising agencies that individually comprised a significant concentration of its accounts receivable and had one customer that comprised approximately 12% of its accounts receivable. As of June 30, 2017 , the Company did not have any customers or advertising agencies that individually comprised a significant concentration of its accounts receivable. For the three and six months ended June 30, 2016 and 2017 , the Company did not have any customers that individually comprised a significant concentration of its revenue. Allowance for Doubtful Accounts The Company extends credit to its customers without requiring collateral. Accounts receivable are stated at net realizable value. The Company utilizes the allowance method to provide for doubtful accounts based on management’s evaluation of the collectability of amounts due. The Company’s estimate is based on historical collection experience and the current status of accounts receivable. Historically, actual write-offs for uncollectible accounts have not significantly differed from the Company’s estimates. At December 31, 2016 and June 30, 2017 , the Company had reserved for $0.3 million of its accounts receivable balance, respectively. The following table presents the changes in the allowance for doubtful accounts for the three and six months ended June 30 (in thousands): Three Months Six Months 2016 2017 2016 2017 Allowance for doubtful accounts: Balance, beginning of period $ 330 $ 289 $ 102 $ 290 Add: adjustment for bad debts (4 ) (2 ) 328 (3 ) Less: write-offs, net of recoveries (11 ) (18 ) (115 ) (18 ) Balance, end of period $ 315 $ 269 $ 315 $ 269 Internal-Use Software Development Costs The Company capitalizes certain costs associated with software developed for internal use, primarily consisting of direct labor costs associated with creating the software. Software development projects generally include three stages: the preliminary project stage (all costs are expensed as incurred); the application development stage (certain costs are capitalized and certain costs are expensed as incurred); and the post-implementation/operation stage (all costs are expensed as incurred). Costs capitalized in the application development stage primarily include costs of designing, coding and testing the software. Capitalization of costs requires judgment in determining when a project has reached the application development stage and the period over which the Company expects to benefit from the use of that software. Once the software is placed in service, these capitalized costs are amortized using the straight-line method over the estimated useful life of the software. Internal-use software development costs of $1.9 million and $1.7 million were capitalized during the three months ended June 30, 2016 and 2017 , respectively. Internal-use software development costs of $3.8 million and $3.4 million were capitalized during the six months ended June 30, 2016 and 2017 , respectively. Capitalized internal-use software development costs are included in property, equipment and software, net in the condensed consolidated balance sheets. Amortization expense related to the capitalized internal-use software was $1.2 million and $1.5 million for the three months ended June 30, 2016 and 2017 , respectively. Amortization expense related to the capitalized internal-use software was $2.2 million and $2.9 million for the six months ended June 30, 2016 and 2017 , respectively, and is primarily included in other cost of revenue and research and development expense in the condensed consolidated statements of operations. The net book value of capitalized internal-use software was $12.0 million and $12.5 million at December 31, 2016 and June 30, 2017 , respectively. Recently Adopted Accounting Pronouncements In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes. This accounting standards update simplifies the presentation of deferred income taxes by eliminating the current requirement for an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts in a classified statement of financial position. ASU 2015-17 requires an entity to classify deferred income tax liabilities and assets, as well as any related valuation allowance, as noncurrent within a classified balance sheet. This accounting standards update is effective for interim or annual periods beginning after December 15, 2016, and can be applied retrospectively or prospectively. The Company elected to early adopt ASU 2015-17, effective December 31, 2016, on a retrospective basis. The Company now has, in each taxable jurisdiction, one deferred tax asset and liability, along with any related valuation allowance, classified as noncurrent on its consolidated balance sheets. The adoption did not have a material effect on the Company’s consolidated results of operations, financial position or cash flows as the Company has a full valuation allowance on deferred tax assets due to its historical losses from operations. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting . This accounting standard simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. ASU 2016-09 is effective for interim or annual periods beginning after December 15, 2016. The Company adopted ASU 2016-09, effective January 1, 2017. The adoption did not have a material effect on the Company’s consolidated results of operations, financial position and cash flows. The following summarizes the effects of the adoption on the Company's unaudited condensed consolidated financial statements: Income taxes - Upon adoption of this standard, all excess tax benefits and tax deficiencies are recognized as income tax expense or benefit in the income statement. The tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. The Company also recognizes excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. The Company has applied the modified retrospective adoption approach beginning in 2017 and has recorded a cumulative-effect adjustment to retained earnings for excess tax benefits in the amount of $0.5 million . Due to the historical losses from the Company’s operations, an offsetting amount of $0.5 million to the valuation allowance has also been recorded through a cumulative-effect adjustment to retained earnings. This adjustment related to tax assets that had previously arisen from tax deductions for equity compensation expenses that were greater than the compensation recognized for financial reporting. These assets had been excluded from the deferred tax assets and liabilities totals on the balance sheet as a result of historical accounting treatment. Prior periods have not been adjusted. Forfeitures - Share-based compensation expense is recognized on a straight line basis, net of estimated forfeitures, such that expense is recognized only for share-based awards that are expected to vest. A forfeiture rate is estimated annually and revised, if necessary, in subsequent periods if actual forfeitures differed from initial estimates. Upon adoption of this standard, the Company continued its forfeiture estimation policy. As such, prior periods have not been adjusted. Earnings Per Share - The Company uses the treasury stock method to compute diluted earnings per share, unless the effect would be anti-dilutive. Under this method, the Company will no longer be required to estimate the tax rate and apply it to the dilutive share calculation for determining the dilutive earnings per share, if necessary. The Company has utilized the modified retrospective adoption approach and has applied this methodology beginning in 2017 and prior periods have not required adjustment. Statements of Cash Flows - Upon adoption of this standard, excess tax benefits are to be classified along with other income tax cash flows as operating activities. In addition, payments to a tax authority by an employer when withholding shares from an employee’s award for tax-withholding purposes are to be classified as financing activities. The Company has elected to adopt this portion of the standard on a prospective basis beginning in 2017. Prior periods have not required adjustment. Upon adoption, no other aspects of this standard had a material impact on the Company's unaudited condensed consolidated results of operations, financial position or cash flows. Recent Accounting Pronouncements Not Yet Adopted In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers . The new standard provides a single principles-based, five-step model to be applied to all contracts with customers, which steps are to (1) identify the contract(s) with the customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when each performance obligation is satisfied. More specifically, revenue will be recognized when promised goods or services are transferred to the customer in an amount that reflects the consideration expected in exchange for those goods or services. This guidance states that an entity should recognize revenue 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. In August 2015, the FASB issued ASU 2015-14, which defers the effective date of ASU 2014-09 for all entities by one year. In March 2016, the FASB issued ASU 2016-08, which clarifies the implementation guidance on principal versus agent considerations. In April 2016, the FASB issued ASU 2016-10, which clarifies the implementation guidance on identifying performance obligations and licensing. In May 2016, the FASB issued ASU 2016-11, Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting , which rescinds SEC paragraphs pursuant to SEC staff announcements. These rescissions include changes to topics pertaining to accounting for shipping and handling fees and costs and accounting for consideration given by a vendor to a customer. In May 2016, the FASB issued ASU 2016-12, Narrow-Scope Improvements and Practical Expedients , which amends certain aspects of the new revenue recognition standard pursuant to ASU 2014-09. In December 2016, the FASB issued ASU 2016-20, which contains amendments that affect narrow aspects of the new revenue recognition guidance. ASU 2014-09, as amended by ASU 2015-14, is effective for interim or annual periods beginning after December 15, 2017. Early adoption of the standard is permitted, but not before the original effective date. The Company plans to adopt ASU 2014-09 as of January 1, 2018 and intends to elect the modified retrospective transition method. The modified retrospective transition method requires the Company to apply the new revenue standard only to the financial statements in the year of adoption and record a cumulative-effect adjustment to retained earnings in the year the new revenue standard is first applied. The opening adjustment to retained earnings will be determined on the basis of the impact of the new revenue standard’s application on contracts that were not yet complete as of the date of initial application. As some of the Company’s more recent product offerings are still in various phases of implementation, to date the Company has focused its ASU 2014-09 adoption efforts on its core historical business offering of delivering targeted digital advertising campaigns. The Company continues to evaluate the effect the standard will have on the Company’s consolidated financial statements and related disclosures. As such, the Company cannot currently reasonably estimate quantitative information related to the impact of the new standard on its consolidated financial statements due, in part, to the potential execution of new product offering agreements throughout the current year. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The purpose of this guidance is to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. This guidance supersedes previous accounting guidance under Topic 840. Under ASU 2016-02, a lessee will be required to recognize assets and liabilities for the rights and obligations created by leases for leases with lease terms of more than 12 months. Lessor accounting remains substantially similar to current GAAP. In addition, disclosures of leasing activities are to be expanded to include qualitative along with specific quantitative information. ASU 2016-02 is effective for interim or annual periods beginning after December 15, 2018 and early adoption is permitted. This standard requires lessees and lessors to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Company does not expect to early adopt this guidance. Although the Company is currently evaluating the impact of this guidance on its consolidated financial statements, the Company currently expects that many of its operating lease commitments will be recognized as operating lease liabilities and right-of-use assets upon adoption of the new guidance. However, based on its implementation progress to date, the Company cannot currently reasonably estimate quantitative information related to the impact of the new standard on its consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments . This new standard provides guidance related to eight specific cash flow issues, with the objective of reducing diversity in practice of how certain cash receipts and payments are presented and classified in the statement of cash flows. ASU 2016-15 is effective for interim or annual periods beginning after December 15, 2017 and early adoption is permitted. ASU 2016-15 must be applied retrospectively, unless it is impracticable to do so, in which case the amendments would be applied prospectively as of the earliest date practicable. The Company does not expect to early adopt this guidance and is currently evaluating the impact of the adoption of this guidance on its consolidated results of operations, financial position and cash flows. In November 2016, the FASB issued ASU 2016-18, Restricted Cash . The purpose of this guidance is to reduce the diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. This guidance requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 is effective for interim or annual periods beginning after December 15, 2017 and early adoption is permitted. This guidance must be applied retrospectively. The Company does not expect to early adopt this guidance and is currently evaluating the impact of the adoption of this guidance on its consolidated results of operations, financial position and cash flows. In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting. This new standard clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as a modification. The purpose of this guidance is to reduce the diversity in practice and result in fewer changes to the terms of awards being accounted for as modifications. ASU 2017-09 does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions, or award classification and would not be required if the changes are considered non-substantive. ASU 2017-09 is effective for interim or annual periods beginning after December 15, 2017 and early adoption is permitted. This guidance should be applied prospectively to an award modified on or after the adoption date. The Company plans to adopt ASU 2017-09 as of January 1, 2018 and will consider the impact that this standard may have on future share-based award changes, should they occur.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. The hierarchy requires the Company to use observable inputs when available, and to minimize the use of unobservable inputs when determining fair value. The carrying amounts of certain of the Company’s financial instruments, including cash and cash equivalents, accounts receivable, other current assets, accounts payable and accrued expenses and other current liabilities, approximate their respective fair values due to their short term nature. The Company’s debt contains a variable rate of interest as of June 30, 2017 and therefore the carrying value of debt approximates its fair value. The fair value of debt falls within Level 3 of the fair value hierarchy as it is significantly driven by the creditworthiness of the Company, which is an unobservable input, and has not changed significantly since December 31, 2016. As described in Note 4, in March 2017 the Company extended the line of credit’s maturity date to March 31, 2018 . In addition, in June 2017 the Company amended the line of credit and extended its maturity date to June 30, 2019 .

Debt

Debt	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Debt	Debt On March 22, 2017 , the Company entered into a fourth amendment to its Amended New Loan and Security Agreement (the “Fourth Amended New Loan and Security Agreement”). The Fourth Amended New Loan and Security Agreement changed the terms and conditions to the revolving line of credit by, among other things, extending the maturity date to March 31, 2018 . There were no modifications to any other material terms with the Fourth Amended New Loan and Security Agreement. On June 26, 2017 , the Company entered into a fifth amendment to its Amended New Loan and Security Agreement (the “Fifth Amended New Loan and Security Agreement”). The Fifth Amended New Loan and Security Agreement changed the terms and conditions to the revolving line of credit (the “Fifth Amended New Revolving Line of Credit”) by: (1) extending the maturity date to June 30, 2019 ; (2) adjusting the borrowing base calculation to be (a) 85% of eligible accounts receivable, plus (b) the lesser of (i) 75% of eligible unbilled accounts or (ii) $12,250,000 , plus (c) 75% of eligible foreign accounts; and (3) changing the amounts related to the Company's financial covenants regarding specified quarterly adjusted EBITDA requirements, as defined and described below. The Fifth Amended New Revolving Line of Credit allows for potential maximum aggregate advances of $35.0 million . The applicable interest rate on outstanding amounts under the revolving line of credit is the referenced prime rate plus 0.5% . The amount available is: (a) the lesser of (i) the Fifth Amended New Revolving Line of Credit or (ii) the amount available under the borrowing base, as determined by lender; minus (b) the outstanding principal balance of any advances. All cash collections from accounts receivable directly reduce the outstanding balance of the revolving credit facility. As of June 30, 2017 , the Company had approximately $1.5 million of availability under the line of credit. The effective interest rate for the Fifth Amended New Revolving Line of Credit was 4.75% as of June 30, 2017 . The loan is secured by substantially all of the Company’s assets. Under the terms of the Fifth Amended New Loan and Security Agreement, the Company is required to meet and maintain certain customary financial and nonfinancial covenants, one of which restricts the Company’s ability to pay any dividends or make any distribution or payment to redeem, retire or purchase any capital stock, subject to certain specified exceptions. The Company must also maintain with the lender all of its primary domestic operating and other deposit and investment accounts consisting of at least 95% of the Company’s total cash and cash equivalents. This agreement also includes customary subjective acceleration clauses; in addition, the Company is required to comply with certain financial covenants, including the following: Adjusted EBITDA . The Company is required to maintain specified quarterly Adjusted EBITDA, which is defined for this purpose, with respect to any trailing twelve-month period, as an amount equal to the sum of net income, plus (a) interest expense, plus (b) to the extent deducted in the calculation of net income, depreciation expense and amortization expense, plus (c) income tax expense, plus or minus (d) change in deferred revenue, less, (e) capitalized software development expenses, plus (f) any non-cash items such as stock-compensation expense (and other mutually agreed upon non-cash items), plus one-time non-recurring charges subject to the lenders approval. This covenant is tested on a quarterly basis. Adjusted Quick Ratio . The Company is required to maintain at all times a 1.0 monthly minimum Adjusted Quick Ratio, which is defined as the ratio of cash held at the lender and cash equivalents plus net accounts receivables to current liabilities (including all debt outstanding under the Fifth Amended New Revolving Line of Credit) minus the current portion of deferred revenue. This covenant is tested on a monthly basis. As of June 30, 2017 , the Company was in compliance with all financial and nonfinancial covenants.

Common Stock Reserved for Issua

Common Stock Reserved for Issuance	6 Months Ended
	Jun. 30, 2017
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Common Stock Reserved for Issuance	Common Stock Reserved for Issuance The Company’s shares of common stock reserved for issuance as of December 31, 2016 and June 30, 2017 were as follows: 2016 2017 Lender warrants to purchase common stock 50,000 50,000 Stock options outstanding 1,026,244 986,795 Unvested restricted stock units 536,100 326,073 Possible future issuance under equity incentive plan 189,513 619,634 Possible future issuance under employee stock purchase plan 66,823 100,089 Total shares reserved 1,868,680 2,082,591

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Equity Incentive Plans Prior to the closing of the Company’s initial public offering on March 11, 2015 (“IPO”), the Company had a stock-based compensation plan, the 2010 Equity Incentive Plan (the “2010 Plan”) under which the Company granted options to purchase shares of common stock to employees, directors and consultants. In January 2015, the Company’s board of directors adopted the 2015 Equity Incentive Plan (the “2015 Plan”), which was subsequently ratified by its stockholders in February 2015. The 2015 Plan is the successor to and continuation of the 2010 Plan. No additional awards are to be granted under the 2010 Plan, but all stock awards granted under the 2010 Plan remain subject to their existing terms. The 2015 Plan provides for the grant of the following awards: (i) incentive and nonstatutory stock options; (ii) stock appreciation rights; (iii) restricted shares; (iv) stock units; and (v) performance cash awards. As of June 30, 2017 , 619,634 shares are available for future grants to employees, non-employee directors, consultants and advisors under the 2015 Plan. Stock Options The terms of the stock options, including the exercise price per share and vesting provisions, are determined by the board of directors. Historically, stock options were granted at exercise prices not less than the estimated fair market value of the Company’s common stock at the date of grant based upon numerous objective and subjective factors including: third-party valuations, preferred stock transactions with third-parties, current operating and financial performance, management estimates and future expectations. Subsequent to the completion of the IPO, the fair value of the Company’s common stock on the grant date has been equal to the most recent closing price of the Company’s stock on the New York Stock Exchange, or beginning May 13, 2016, on the Nasdaq. Stock option grants typically vest upon the expiration of an initial one year cliff and vest monthly thereafter over the remaining thirty-six months assuming continuing service, and expire ten years from the grant date. Stock-based compensation expense related to stock options is included in the following line items in the condensed consolidated statements of operations for the three and six months ended June 30 (in thousands): Three Months Six Months 2016 2017 2016 2017 Other cost of revenue $ 20 $ 18 $ 38 $ 35 Sales and marketing 173 128 367 291 Research and development 337 247 672 498 General and administrative 375 360 769 716 $ 905 $ 753 $ 1,846 $ 1,540 The Company accounts for stock options granted to employees based on their estimated fair values on the date of grant. The fair value of each stock option granted is estimated using the Black-Scholes option-pricing model, which requires the input of subjective assumptions, including the risk-free interest rate, expected life, expected stock price volatility and dividend yield. The risk-free interest rate assumption is based upon observed interest rates for constant maturity U.S. Treasury securities consistent with the expected term of the Company’s employee stock options. The expected life represents the period of time the stock options are expected to be outstanding and is based on the simplified method. The Company uses the simplified method due to the lack of sufficient historical exercise data to provide a reasonable basis upon which to otherwise estimate the expected life of the stock options. Expected volatility is based on historical volatilities for publicly traded stock of comparable companies over the estimated expected life of the stock options. The Company assumes no dividend yield, which is consistent with the Company’s history of not paying dividends. The stock-based compensation expense is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The following table summarizes the assumptions used for estimating the fair value of stock options granted to employees for the three and six months ended June 30 : Three Months Six Months 2016 2017 2016 2017 Risk-free interest rate 1.16% - 1.53% 1.90% - 2.09% 1.16% - 1.53% 1.90% - 2.09% Expected term (years) 6.08 6.08 6.08 6.08 Expected volatility 47% 46% - 47% 46% - 47% 46% - 47% Dividend yield —% —% —% —% The following table summarizes the Company’s stock option activity for the six months ended June 30, 2017 : Number of Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Outstanding balance at January 1, 2017 1,026,244 $ 28.73 7.65 $ 299 Granted 54,420 5.78 Exercised (27,529 ) 1.75 Cancelled (66,340 ) 28.96 Outstanding balance at June 30, 2017 986,795 $ 28.20 7.36 $ 406 Exercisable at June 30, 2017 622,316 $ 31.59 6.77 $ 287 Vested and expected to vest at June 30, 2017 952,134 $ 28.81 7.30 $ 381 The weighted-average grant date fair value for the Company’s stock options granted was $4.57 and $3.23 per share during the three months ended June 30 , 2016 and 2017 , respectively. The weighted-average grant date fair value for the Company’s stock options granted was $3.94 and $2.69 per share during the six months ended June 30, 2016 and 2017 , respectively. The total compensation cost related to unvested stock options not yet recognized as of June 30, 2017 was $3.7 million and will be recognized over a weighted-average period of approximately 0.86 years . The aggregate intrinsic value of stock options exercised during the three and six months ended June 30, 2016 was $0.08 million and $0.09 million , respectively. The aggregate intrinsic value of stock options exercised during the three and six months ended June 30, 2017 was $0.1 million and $0.1 million , respectively. There was no associated income tax benefit recognized for the three and six months ended June 30 , 2016 and 2017 based on the Company’s valuation allowance that is recorded against its net deferred tax assets. Restricted Stock Units The terms of the restricted stock units (“RSU’s”), including the vesting provisions, are determined by the board of directors. Each restricted stock unit represents the contingent right to receive one share of common stock of the Company. The RSUs granted typically vest, over a two-year term, upon the expiration of an initial six month cliff period and quarterly thereafter assuming continuing service. The Company accounts for RSU’s granted to employees based on their estimated fair values on the date of grant. The fair value of RSU’s is estimated based on the closing price of the underlying common stock on the date of grant. Stock-based compensation expense related to the RSU’s is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The Company initially granted RSU’s during the third quarter of 2016, and as such, did not have any stock-based compensation expense related to RSU’s for the three and six months ended June 30 , 2016. Stock-based compensation expense related to RSU’s is included in the following line items in the condensed consolidated statements of operations for the three and six months ended June 30 (in thousands): Three Months Ended Six Months Ended Other cost of revenue $ 26 $ 57 Sales and marketing 85 200 Research and development 296 627 General and administrative 148 301 $ 555 $ 1,185 The following table summarizes the Company’s restricted stock unit activity for the six months ended June 30, 2017 : Number of Weighted- Nonvested balance at January 1, 2017 536,100 $ 8.87 Granted 9,800 5.55 Vested (189,927 ) 8.87 Forfeited (29,900 ) 8.72 Nonvested balance at June 30, 2017 326,073 $ 8.78 The total compensation cost related to nonvested RSU’s not yet recognized as of June 30, 2017 was $2.8 million and will be recognized over a weighted-average period of approximately 0.74 years . The total fair value of RSU’s vested during the three and six months ended June 30, 2017 was $0.5 million and $1.3 million , respectively. Employee Stock Purchase Plan In January 2015, the Company’s board of directors adopted the 2015 Employee Stock Purchase Plan (the “2015 ESPP”), which was subsequently ratified by its stockholders in February 2015. The 2015 ESPP allows eligible employees to purchase shares of common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to limitations set forth in the 2015 ESPP. Unless otherwise determined by the compensation committee, two offering periods of six months’ duration will begin each year on May 1 and November 1. At the end of each offering period, employees are able to purchase shares at the lower of 85% of the fair market value of the common stock on the first day of an offering period or on the purchase date. The Company has accumulated employee withholdings of $0.1 million as of June 30, 2017 associated with the next purchase date. Stock-based compensation expense related to the 2015 ESPP is included in the following line items in the condensed consolidated statements of operations for the three and six months ended June 30 (in thousands): Three Months Six Months 2016 2017 2016 2017 Other cost of revenue $ 1 $ — $ 4 $ 1 Sales and marketing 13 10 41 22 Research and development 32 16 86 34 General and administrative 4 5 17 11 $ 50 $ 31 $ 148 $ 68 The Company accounts for shares to be issued under its employee stock purchase plan based on the fair value of the shares determined using the Black-Scholes option pricing model on the first day of the offering period. The fair value of the “look back” option for 2015 ESPP shares issued during the offering period is estimated using: (1) a 15% discount on the purchase of the stock; (2) 85% of the fair value of the call option; and (3) 15% of the fair value of the put option. Stock-based compensation expense related to the employee stock purchase plan is recognized on a straight-line basis over the offering period, net of estimated forfeitures. As of June 30, 2017 , the total unrecognized stock-based compensation cost related to the 2015 ESPP was insignificant.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation The Company is subject to various legal matters and claims in the ordinary course of business. Although the results of legal proceedings and claims cannot be predicted with certainty, in the opinion of management, there are currently no such known matters that will have a material effect on the financial condition, results of operations or cash flows of the Company. The Company, certain of its officers and directors, and certain investment banking firms who acted as underwriters in connection with the Company’s IPO, were named as defendants in a putative class action lawsuit filed August 31, 2015 in the United States District Court for the Southern District of New York. The complaint alleged that the defendants violated Sections 11, 12 and 15 of the Securities Act by not including information regarding customer concentration, which the complaint characterized as a known trend and/or significant factor required to be disclosed under federal securities regulations. The complaint sought unspecified damages, interest and other costs. The Court appointed a Lead Plaintiff on November 18, 2015, and on January 19, 2016 the Lead Plaintiff filed a First Amended Complaint that repeated the same substantive allegations included in the initial complaint and continued to seek unspecified damages. On March 24, 2016, the Company filed a motion to dismiss the First Amended Complaint. The Lead Plaintiff filed an opposition to that motion on May 9, 2016, and the Company filed a reply brief on June 8, 2016. On February 13, 2017, the United States District Court for the Southern District of New York filed a Memorandum Opinion and Order dismissing the First Amended Complaint against the Company, the individual defendants and the underwriter defendants. The Plaintiff filed a motion with the Court to reconsider the Order of dismissal and reinstate the claims against the defendants on February 27, 2017. The Company filed an opposition brief on March 13, 2017. As of June 30, 2017, the deadline for the Plaintiff to file a notice of appeal passed without any further activity. Therefore, the Order of dismissal filed on February 13, 2017 is considered final. As such, the Company has concluded that this matter is closed. Legal fees are expensed in the period in which they are incurred. Purchase Commitments The Company has $4.3 million of non-cancelable contractual commitments as of June 30, 2017 , primarily related to purchases of data, third-party data centers and other support services. Of these commitments, $3.7 million and $0.6 million are due within the next year and within the next two years, respectively. Indemnification Agreements In the ordinary course of business, the Company may provide indemnifications of varying scope and terms to customers, vendors, lessors, business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, services to be provided by the Company or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with directors and certain officers and employees that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees. Under certain circumstances, the Company’s indemnification obligations may include the cost of advancing legal expenses and indemnifying its officers, directors and underwriters for costs arising out of litigation, including the matter described above under “Commitments and Contingencies — Litigation,” to the extent such costs are not covered by the Company’s directors’ and officers’ liability insurance. There are no claims that the Company is aware of that could have a material effect on the Company’s financial position, results of operations or cash flows.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The Company calculates net loss per basic share by dividing net loss by the weighted-average number of shares outstanding during the reporting period. The Company calculates net loss per diluted share by dividing net loss by the weighted-average number of shares outstanding during the reporting period plus the effects of any dilutive common stock-based instruments. Due to the net losses for the three and six months ended June 30, 2016 and 2017 , basic and diluted loss per share were the same, as the effect of potentially dilutive securities would have been anti-dilutive. The following securities have been excluded from the calculation of weighted-average common shares outstanding because the effect is anti-dilutive for the three and six months ended June 30 : Three Months Six Months 2016 2017 2016 2017 Lender warrants to purchase common stock 50,000 50,000 50,000 50,000 2015 ESPP 34,221 34,053 34,221 34,053 Restricted stock units — 326,073 — 326,073 Stock options 1,095,428 986,795 1,095,428 986,795 Total 1,179,649 1,396,921 1,179,649 1,396,921

Summary of Significant Accoun16

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). All intercompany accounts and transactions have been eliminated in consolidation.
Basis of Presentation and Unaudited Interim Condensed Consolidated Financial Information	Basis of Presentation The condensed consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Unaudited Interim Condensed Consolidated Financial Information The condensed consolidated financial statements and footnotes have been prepared in accordance with GAAP as contained in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and applicable rules and regulations of the Securities and Exchange Commission’s (“SEC”) Rule 10-01 of Regulation S-X for interim financial information. In the opinion of management, the interim financial information includes all adjustments of a normal recurring nature necessary for a fair presentation of financial position, the results of operations, comprehensive loss, changes in stockholders’ equity and cash flows. The results of operations for the three and six months ended June 30, 2017 are not necessarily indicative of the results for the full year or the results for any future periods. The accompanying condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016 (“Form 10-K”). The significant accounting policies and recent accounting pronouncements were described in Note 2 to the consolidated financial statements included in the Form 10-K. There have been no significant changes in or updates to the accounting policies since December 31, 2016 , other than as described below within “Recently Adopted Accounting Pronouncements.”
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the condensed consolidated financial statements and accompanying notes. The Company evaluates its estimates, including those related to its allowance for doubtful accounts, revenue recognition, internal-use software, stock-based compensation and income taxes and related valuation allowances. The Company bases its estimates on its historical experience and on various other assumptions that it believes to be reasonable, the results of which form the basis for making judgments about the carrying value of assets and liabilities. Actual results could differ from those estimates.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash, cash equivalents and accounts receivable. All of the Company’s cash and cash equivalents are held at financial institutions that management believes to be of high credit quality. The Company’s cash and cash equivalent accounts exceed federally insured limits. The Company has not experienced any losses on cash and cash equivalents to date. To manage accounts receivable risk, the Company evaluates and monitors the creditworthiness of its customers.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The Company extends credit to its customers without requiring collateral. Accounts receivable are stated at net realizable value. The Company utilizes the allowance method to provide for doubtful accounts based on management’s evaluation of the collectability of amounts due. The Company’s estimate is based on historical collection experience and the current status of accounts receivable. Historically, actual write-offs for uncollectible accounts have not significantly differed from the Company’s estimates.
Internal-Use Software Development Costs	Internal-Use Software Development Costs The Company capitalizes certain costs associated with software developed for internal use, primarily consisting of direct labor costs associated with creating the software. Software development projects generally include three stages: the preliminary project stage (all costs are expensed as incurred); the application development stage (certain costs are capitalized and certain costs are expensed as incurred); and the post-implementation/operation stage (all costs are expensed as incurred). Costs capitalized in the application development stage primarily include costs of designing, coding and testing the software. Capitalization of costs requires judgment in determining when a project has reached the application development stage and the period over which the Company expects to benefit from the use of that software. Once the software is placed in service, these capitalized costs are amortized using the straight-line method over the estimated useful life of the software.
Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Pronouncements In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes. This accounting standards update simplifies the presentation of deferred income taxes by eliminating the current requirement for an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts in a classified statement of financial position. ASU 2015-17 requires an entity to classify deferred income tax liabilities and assets, as well as any related valuation allowance, as noncurrent within a classified balance sheet. This accounting standards update is effective for interim or annual periods beginning after December 15, 2016, and can be applied retrospectively or prospectively. The Company elected to early adopt ASU 2015-17, effective December 31, 2016, on a retrospective basis. The Company now has, in each taxable jurisdiction, one deferred tax asset and liability, along with any related valuation allowance, classified as noncurrent on its consolidated balance sheets. The adoption did not have a material effect on the Company’s consolidated results of operations, financial position or cash flows as the Company has a full valuation allowance on deferred tax assets due to its historical losses from operations. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting . This accounting standard simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. ASU 2016-09 is effective for interim or annual periods beginning after December 15, 2016. The Company adopted ASU 2016-09, effective January 1, 2017. The adoption did not have a material effect on the Company’s consolidated results of operations, financial position and cash flows. The following summarizes the effects of the adoption on the Company's unaudited condensed consolidated financial statements: Income taxes - Upon adoption of this standard, all excess tax benefits and tax deficiencies are recognized as income tax expense or benefit in the income statement. The tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. The Company also recognizes excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. The Company has applied the modified retrospective adoption approach beginning in 2017 and has recorded a cumulative-effect adjustment to retained earnings for excess tax benefits in the amount of $0.5 million . Due to the historical losses from the Company’s operations, an offsetting amount of $0.5 million to the valuation allowance has also been recorded through a cumulative-effect adjustment to retained earnings. This adjustment related to tax assets that had previously arisen from tax deductions for equity compensation expenses that were greater than the compensation recognized for financial reporting. These assets had been excluded from the deferred tax assets and liabilities totals on the balance sheet as a result of historical accounting treatment. Prior periods have not been adjusted. Forfeitures - Share-based compensation expense is recognized on a straight line basis, net of estimated forfeitures, such that expense is recognized only for share-based awards that are expected to vest. A forfeiture rate is estimated annually and revised, if necessary, in subsequent periods if actual forfeitures differed from initial estimates. Upon adoption of this standard, the Company continued its forfeiture estimation policy. As such, prior periods have not been adjusted. Earnings Per Share - The Company uses the treasury stock method to compute diluted earnings per share, unless the effect would be anti-dilutive. Under this method, the Company will no longer be required to estimate the tax rate and apply it to the dilutive share calculation for determining the dilutive earnings per share, if necessary. The Company has utilized the modified retrospective adoption approach and has applied this methodology beginning in 2017 and prior periods have not required adjustment. Statements of Cash Flows - Upon adoption of this standard, excess tax benefits are to be classified along with other income tax cash flows as operating activities. In addition, payments to a tax authority by an employer when withholding shares from an employee’s award for tax-withholding purposes are to be classified as financing activities. The Company has elected to adopt this portion of the standard on a prospective basis beginning in 2017. Prior periods have not required adjustment. Upon adoption, no other aspects of this standard had a material impact on the Company's unaudited condensed consolidated results of operations, financial position or cash flows. Recent Accounting Pronouncements Not Yet Adopted In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers . The new standard provides a single principles-based, five-step model to be applied to all contracts with customers, which steps are to (1) identify the contract(s) with the customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when each performance obligation is satisfied. More specifically, revenue will be recognized when promised goods or services are transferred to the customer in an amount that reflects the consideration expected in exchange for those goods or services. This guidance states that an entity should recognize revenue 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. In August 2015, the FASB issued ASU 2015-14, which defers the effective date of ASU 2014-09 for all entities by one year. In March 2016, the FASB issued ASU 2016-08, which clarifies the implementation guidance on principal versus agent considerations. In April 2016, the FASB issued ASU 2016-10, which clarifies the implementation guidance on identifying performance obligations and licensing. In May 2016, the FASB issued ASU 2016-11, Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting , which rescinds SEC paragraphs pursuant to SEC staff announcements. These rescissions include changes to topics pertaining to accounting for shipping and handling fees and costs and accounting for consideration given by a vendor to a customer. In May 2016, the FASB issued ASU 2016-12, Narrow-Scope Improvements and Practical Expedients , which amends certain aspects of the new revenue recognition standard pursuant to ASU 2014-09. In December 2016, the FASB issued ASU 2016-20, which contains amendments that affect narrow aspects of the new revenue recognition guidance. ASU 2014-09, as amended by ASU 2015-14, is effective for interim or annual periods beginning after December 15, 2017. Early adoption of the standard is permitted, but not before the original effective date. The Company plans to adopt ASU 2014-09 as of January 1, 2018 and intends to elect the modified retrospective transition method. The modified retrospective transition method requires the Company to apply the new revenue standard only to the financial statements in the year of adoption and record a cumulative-effect adjustment to retained earnings in the year the new revenue standard is first applied. The opening adjustment to retained earnings will be determined on the basis of the impact of the new revenue standard’s application on contracts that were not yet complete as of the date of initial application. As some of the Company’s more recent product offerings are still in various phases of implementation, to date the Company has focused its ASU 2014-09 adoption efforts on its core historical business offering of delivering targeted digital advertising campaigns. The Company continues to evaluate the effect the standard will have on the Company’s consolidated financial statements and related disclosures. As such, the Company cannot currently reasonably estimate quantitative information related to the impact of the new standard on its consolidated financial statements due, in part, to the potential execution of new product offering agreements throughout the current year. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The purpose of this guidance is to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. This guidance supersedes previous accounting guidance under Topic 840. Under ASU 2016-02, a lessee will be required to recognize assets and liabilities for the rights and obligations created by leases for leases with lease terms of more than 12 months. Lessor accounting remains substantially similar to current GAAP. In addition, disclosures of leasing activities are to be expanded to include qualitative along with specific quantitative information. ASU 2016-02 is effective for interim or annual periods beginning after December 15, 2018 and early adoption is permitted. This standard requires lessees and lessors to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Company does not expect to early adopt this guidance. Although the Company is currently evaluating the impact of this guidance on its consolidated financial statements, the Company currently expects that many of its operating lease commitments will be recognized as operating lease liabilities and right-of-use assets upon adoption of the new guidance. However, based on its implementation progress to date, the Company cannot currently reasonably estimate quantitative information related to the impact of the new standard on its consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments . This new standard provides guidance related to eight specific cash flow issues, with the objective of reducing diversity in practice of how certain cash receipts and payments are presented and classified in the statement of cash flows. ASU 2016-15 is effective for interim or annual periods beginning after December 15, 2017 and early adoption is permitted. ASU 2016-15 must be applied retrospectively, unless it is impracticable to do so, in which case the amendments would be applied prospectively as of the earliest date practicable. The Company does not expect to early adopt this guidance and is currently evaluating the impact of the adoption of this guidance on its consolidated results of operations, financial position and cash flows. In November 2016, the FASB issued ASU 2016-18, Restricted Cash . The purpose of this guidance is to reduce the diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. This guidance requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 is effective for interim or annual periods beginning after December 15, 2017 and early adoption is permitted. This guidance must be applied retrospectively. The Company does not expect to early adopt this guidance and is currently evaluating the impact of the adoption of this guidance on its consolidated results of operations, financial position and cash flows. In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting. This new standard clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as a modification. The purpose of this guidance is to reduce the diversity in practice and result in fewer changes to the terms of awards being accounted for as modifications. ASU 2017-09 does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions, or award classification and would not be required if the changes are considered non-substantive. ASU 2017-09 is effective for interim or annual periods beginning after December 15, 2017 and early adoption is permitted. This guidance should be applied prospectively to an award modified on or after the adoption date. The Company plans to adopt ASU 2017-09 as of January 1, 2018 and will consider the impact that this standard may have on future share-based award changes, should they occur.
Fair Value Measurements	The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. The hierarchy requires the Company to use observable inputs when available, and to minimize the use of unobservable inputs when determining fair value. The carrying amounts of certain of the Company’s financial instruments, including cash and cash equivalents, accounts receivable, other current assets, accounts payable and accrued expenses and other current liabilities, approximate their respective fair values due to their short term nature. The Company’s debt contains a variable rate of interest as of June 30, 2017 and therefore the carrying value of debt approximates its fair value. The fair value of debt falls within Level 3 of the fair value hierarchy as it is significantly driven by the creditworthiness of the Company, which is an unobservable input, and has not changed significantly since December 31, 2016.
Stock-Based Compensation	The Company accounts for stock options granted to employees based on their estimated fair values on the date of grant. The fair value of each stock option granted is estimated using the Black-Scholes option-pricing model, which requires the input of subjective assumptions, including the risk-free interest rate, expected life, expected stock price volatility and dividend yield. The risk-free interest rate assumption is based upon observed interest rates for constant maturity U.S. Treasury securities consistent with the expected term of the Company’s employee stock options. The expected life represents the period of time the stock options are expected to be outstanding and is based on the simplified method. The Company uses the simplified method due to the lack of sufficient historical exercise data to provide a reasonable basis upon which to otherwise estimate the expected life of the stock options. Expected volatility is based on historical volatilities for publicly traded stock of comparable companies over the estimated expected life of the stock options. The Company assumes no dividend yield, which is consistent with the Company’s history of not paying dividends. The stock-based compensation expense is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The Company accounts for shares to be issued under its employee stock purchase plan based on the fair value of the shares determined using the Black-Scholes option pricing model on the first day of the offering period. The fair value of the “look back” option for 2015 ESPP shares issued during the offering period is estimated using: (1) a 15% discount on the purchase of the stock; (2) 85% of the fair value of the call option; and (3) 15% of the fair value of the put option. Stock-based compensation expense related to the employee stock purchase plan is recognized on a straight-line basis over the offering period, net of estimated forfeitures. The Company accounts for RSU’s granted to employees based on their estimated fair values on the date of grant. The fair value of RSU’s is estimated based on the closing price of the underlying common stock on the date of grant. Stock-based compensation expense related to the RSU’s is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures.
Earnings Per Share	The Company calculates net loss per basic share by dividing net loss by the weighted-average number of shares outstanding during the reporting period. The Company calculates net loss per diluted share by dividing net loss by the weighted-average number of shares outstanding during the reporting period plus the effects of any dilutive common stock-based instruments.

Summary of Significant Accoun17

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Schedule of changes in the allowance for doubtful accounts	The following table presents the changes in the allowance for doubtful accounts for the three and six months ended June 30 (in thousands): Three Months Six Months 2016 2017 2016 2017 Allowance for doubtful accounts: Balance, beginning of period $ 330 $ 289 $ 102 $ 290 Add: adjustment for bad debts (4 ) (2 ) 328 (3 ) Less: write-offs, net of recoveries (11 ) (18 ) (115 ) (18 ) Balance, end of period $ 315 $ 269 $ 315 $ 269

Common Stock Reserved for Iss18

Common Stock Reserved for Issuance (Tables)	6 Months Ended
	Jun. 30, 2017
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Schedule of common stock reserved for issuance	The Company’s shares of common stock reserved for issuance as of December 31, 2016 and June 30, 2017 were as follows: 2016 2017 Lender warrants to purchase common stock 50,000 50,000 Stock options outstanding 1,026,244 986,795 Unvested restricted stock units 536,100 326,073 Possible future issuance under equity incentive plan 189,513 619,634 Possible future issuance under employee stock purchase plan 66,823 100,089 Total shares reserved 1,868,680 2,082,591

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of stock-based compensation expense	Stock-based compensation expense related to stock options is included in the following line items in the condensed consolidated statements of operations for the three and six months ended June 30 (in thousands): Three Months Six Months 2016 2017 2016 2017 Other cost of revenue $ 20 $ 18 $ 38 $ 35 Sales and marketing 173 128 367 291 Research and development 337 247 672 498 General and administrative 375 360 769 716 $ 905 $ 753 $ 1,846 $ 1,540 Stock-based compensation expense related to the 2015 ESPP is included in the following line items in the condensed consolidated statements of operations for the three and six months ended June 30 (in thousands): Three Months Six Months 2016 2017 2016 2017 Other cost of revenue $ 1 $ — $ 4 $ 1 Sales and marketing 13 10 41 22 Research and development 32 16 86 34 General and administrative 4 5 17 11 $ 50 $ 31 $ 148 $ 68 Stock-based compensation expense related to RSU’s is included in the following line items in the condensed consolidated statements of operations for the three and six months ended June 30 (in thousands): Three Months Ended Six Months Ended Other cost of revenue $ 26 $ 57 Sales and marketing 85 200 Research and development 296 627 General and administrative 148 301 $ 555 $ 1,185
Summary of the assumptions used for estimating the fair value of stock options granted to employees	The following table summarizes the assumptions used for estimating the fair value of stock options granted to employees for the three and six months ended June 30 : Three Months Six Months 2016 2017 2016 2017 Risk-free interest rate 1.16% - 1.53% 1.90% - 2.09% 1.16% - 1.53% 1.90% - 2.09% Expected term (years) 6.08 6.08 6.08 6.08 Expected volatility 47% 46% - 47% 46% - 47% 46% - 47% Dividend yield —% —% —% —%
Summary of stock option activity	The following table summarizes the Company’s stock option activity for the six months ended June 30, 2017 : Number of Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Outstanding balance at January 1, 2017 1,026,244 $ 28.73 7.65 $ 299 Granted 54,420 5.78 Exercised (27,529 ) 1.75 Cancelled (66,340 ) 28.96 Outstanding balance at June 30, 2017 986,795 $ 28.20 7.36 $ 406 Exercisable at June 30, 2017 622,316 $ 31.59 6.77 $ 287 Vested and expected to vest at June 30, 2017 952,134 $ 28.81 7.30 $ 381
Summary of restricted stock unit activity	The following table summarizes the Company’s restricted stock unit activity for the six months ended June 30, 2017 : Number of Weighted- Nonvested balance at January 1, 2017 536,100 $ 8.87 Granted 9,800 5.55 Vested (189,927 ) 8.87 Forfeited (29,900 ) 8.72 Nonvested balance at June 30, 2017 326,073 $ 8.78

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Summary of anti-dilutive securities which are excluded from the calculation of weighted average common shares outstanding	The following securities have been excluded from the calculation of weighted-average common shares outstanding because the effect is anti-dilutive for the three and six months ended June 30 : Three Months Six Months 2016 2017 2016 2017 Lender warrants to purchase common stock 50,000 50,000 50,000 50,000 2015 ESPP 34,221 34,053 34,221 34,053 Restricted stock units — 326,073 — 326,073 Stock options 1,095,428 986,795 1,095,428 986,795 Total 1,179,649 1,396,921 1,179,649 1,396,921

Description of Business - Organ

Description of Business - Organization (Details)	Jun. 30, 2017office
United Kingdom
Entity Location [Line Items]
Number of offices	1

Description of Business - Rever

Description of Business - Reverse Stock Split (Details)	Apr. 25, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Stock split conversion ratio	0.25

Description of Business - Stock

Description of Business - Stock Repurchase Program (Details) - Common Stock - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 04, 2016
Equity, Class of Treasury Stock [Line Items]
Amount of stock repurchase program authorized (up to)					$ 4
Number of shares repurchased (in shares)	36,020	15,197	49,101	15,197
Weighted average price per share of shares repurchased (in usd per share)	$ 6.93	$ 8.19	$ 6.62	$ 8.19
Amount available for common stock repurchases under the program	$ 3.6		$ 3.6

Summary of Significant Accoun24

Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - Major Customer One - Accounts Receivable - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2016customer
Concentration Risk [Line Items]
Concentration risk, number of customers	1
Concentration risk, percentage of accounts receivable	12.00%

Summary of Significant Accoun25

Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Allowance for doubtful accounts:
Balance, beginning of period	$ 289	$ 330	$ 290	$ 102
Add: adjustment for bad debts	(2)	(4)	(3)	328
Less: write-offs, net of recoveries	(18)	(11)	(18)	(115)
Balance, end of period	$ 269	$ 315	$ 269	$ 315

Summary of Significant Accoun26

Summary of Significant Accounting Policies - Internal-Use Software Development Costs (Details) - Capitalized internal-use software costs - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Internal-Use Software Development Costs
Capitalized development costs	$ 1.7	$ 1.9	$ 3.4	$ 3.8
Amortization expense	1.5	$ 1.2	2.9	$ 2.2
Net book value	$ 12.5		$ 12.5		$ 12

Summary of Significant Accoun27

Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements (Details) - Accounting Standards Update 2016-09 $ in Millions	Jan. 01, 2017USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to valuation allowance	$ 0.5
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to retained earnings for excess tax benefits	$ 0.5

Debt - Agreement Terms (Details

Debt - Agreement Terms (Details) - Amended New Loan and Security Agreement	6 Months Ended
	Jun. 30, 2017USD ($)
Debt
Maximum borrowing capacity	$ 35,000,000
Percentage of eligible accounts receivable used in calculation of amount available under the borrowing base	85.00%
Percentage of eligible unbilled accounts receivable used in calculation of amount available under the borrowing base	75.00%
Maximum borrowing capacity related to eligible unbilled accounts receivable	$ 12,250,000
Percentage of eligible foreign accounts receivable used in calculation of amount available under the borrowing base	75.00%
Available borrowing capacity	$ 1,500,000
Minimum percentage of the Company’s total cash and cash equivalents balance required to be maintained with lender	95.00%
Revolving Line of Credit
Debt
Effective interest rate	4.75%
Revolving Line of Credit | Prime
Debt
Potential interest rate margin (as a percent)	0.50%
Minimum | Revolving Line of Credit
Debt
Debt covenant, required minimum adjusted quick ratio	1

Common Stock Reserved for Futur

Common Stock Reserved for Future Issuance (Details) - shares	Jun. 30, 2017	Dec. 31, 2016
Common Stock Reserved for Issuance
Total shares reserved	2,082,591	1,868,680
Employee Stock Purchase Plan
Common Stock Reserved for Issuance
Total shares reserved	100,089	66,823
Equity Incentive Plans
Common Stock Reserved for Issuance
Total shares reserved	619,634	189,513
Stock options
Common Stock Reserved for Issuance
Total shares reserved	986,795	1,026,244
Unvested restricted stock units
Common Stock Reserved for Issuance
Total shares reserved	326,073	536,100
Lender warrants to purchase common stock
Common Stock Reserved for Issuance
Total shares reserved	50,000	50,000

Stock-Based Compensation - Equi

Stock-Based Compensation - Equity Incentive Plan Terms (Details)	6 Months Ended
	Jun. 30, 2017shares
2015 Equity Incentive Plan
Stock-Based compensation
Shares available for future grants	619,634
2015 Equity Incentive Plan | Restricted stock units
Award terms
Vesting period	2 years
2015 Equity Incentive Plan | Initial Cliff Period | Restricted stock units
Award terms
Vesting period	6 months
Equity Incentive Plans | Stock options
Award terms
Term of grant (in years)	10 years
Equity Incentive Plans | Initial Cliff Period | Stock options
Award terms
Vesting period	1 year
Equity Incentive Plans | Remaining Vesting Period | Stock options
Award terms
Vesting period	36 months

Stock-Based Compensation - Allo

Stock-Based Compensation - Allocation of Stock-Based Compensation Expense, Stock Options (Details) - Stock options - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	$ 753	$ 905	$ 1,540	$ 1,846
Other cost of revenue
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	18	20	35	38
Sales and marketing
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	128	173	291	367
Research and development
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	247	337	498	672
General and administrative
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	$ 360	$ 375	$ 716	$ 769

Stock-Based Compensation - Fair

Stock-Based Compensation - Fair Value Assumptions, Stock Options (Details) - Stock options	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Fair Value Assumptions using Black-Scholes option pricing model
Risk free interest rate, minimum	1.90%	1.16%	1.90%	1.16%
Risk free interest rate, maximum	2.09%	1.53%	2.09%	1.53%
Expected term (years)	6 years 29 days	6 years 29 days	6 years 29 days	6 years 29 days
Expected volatility		47.00%
Expected volatility, minimum	46.00%		46.00%	46.00%
Expected volatility, maximum	47.00%		47.00%	47.00%
Dividend yield	0.00%	0.00%	0.00%	0.00%

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Number of Options
Outstanding balance at beginning of period (in shares)	1,026,244
Granted (in shares)	54,420
Exercised (in shares)	(27,529)
Cancelled (in shares)	(66,340)
Outstanding balance at end of period (in shares)	986,795	1,026,244
Exercisable at end of period (in shares)	622,316
Vested and expected to vest at end of period (in shares)	952,134
Weighted Average Exercise Price
Outstanding balance at beginning of period (in usd per share)	$ 28.73
Granted (in usd per share)	5.78
Exercised (in usd per share)	1.75
Cancelled (in usd per share)	28.96
Outstanding balance at end of period (in usd per share)	28.20	$ 28.73
Exercisable at end of period (in usd per share)	31.59
Vested and expected to vest at end of period (in usd per share)	$ 28.81
Weighted Average Remaining Contractual Term
Outstanding balance at end of period (in years)	7 years 4 months 10 days	7 years 7 months 24 days
Exercisable at end of period (in years)	6 years 9 months 7 days
Vested and expected to vest at end of period (in years)	7 years 3 months 18 days
Aggregate Intrinsic Value
Outstanding balance at end of period	$ 406	$ 299
Exercisable at end of period	287
Vested and expected to vest at end of period	$ 381

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Disclosures, Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stock-Based compensation
Weighted-average grant date fair value (in usd per share)	$ 3.23	$ 4.57	$ 2.69	$ 3.94
Unrecognized compensation cost related to nonvested share-based compensation arrangements	$ 3,700		$ 3,700
Intrinsic value of options exercised	$ 100	$ 80	$ 100	$ 90
Stock options
Stock-Based compensation
Expected weighted-average period for recognition of unrecognized stock-based compensation costs (in years)			10 months 10 days

Stock-Based Compensation - Al35

Stock-Based Compensation - Allocation of Stock-Based Compensation Expense, RSUs (Details) - Restricted stock units - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	$ 555	$ 1,185
Other cost of revenue
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	26	57
Sales and marketing
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	85	200
Research and development
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	296	627
General and administrative
Share-based compensation expense by statement of operations line item
Stock-based compensation expense	$ 148	$ 301

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Unit Activity (Details) - Restricted stock units	6 Months Ended
	Jun. 30, 2017$ / sharesshares
Number of Shares
Nonvested balance at beginning of period (in shares) | shares	536,100
Granted (in shares) | shares	9,800
Vested (in shares) | shares	(189,927)
Forfeited (in shares) | shares	(29,900)
Nonvested balance at end of period (in shares) | shares	326,073
Weighted Average Grant Date Fair Value
Nonvested balance at beginning of period (in usd per share) | $ / shares	$ 8.87
Granted (in usd per share) | $ / shares	5.55
Vested (in usd per share) | $ / shares	8.87
Forfeited (in usd per share) | $ / shares	8.72
Nonvested balance at end of period (in usd per share) | $ / shares	$ 8.78

Stock-Based Compensation - Ad37

Stock-Based Compensation - Additional Disclosures, RSUs (Details) - Restricted stock units $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)
Stock-Based compensation
Unrecognized compensation cost related to nonvested share-based compensation arrangements	$ 2.8	$ 2.8
Expected weighted-average period for recognition of unrecognized stock-based compensation costs (in years)		8 months 27 days
Fair value of RSUs vested	$ 0.5	$ 1.3

Stock-Based Compensation - Empl

Stock-Based Compensation - Employee Stock Purchase Plan (Details) - 2015 ESPP $ in Millions	1 Months Ended	6 Months Ended
	Jan. 31, 2015offering_period	Jun. 30, 2017USD ($)
Stock-Based compensation
Maximum percentage of eligible compensation per employee to purchase shares of common stock	15.00%
Number of offering periods under terms of plan | offering_period	2
Offering periods beginning on May 1 and November 1	6 months
Employee purchase price, percentage of fair market value of common stock	85.00%
Accumulated employee withholdings | $		$ 0.1
Discount on purchase of stock (as a percent)		15.00%
Call Option
Stock-Based compensation
Fair value of option (as a percent)		85.00%
Put Option
Stock-Based compensation
Fair value of option (as a percent)		15.00%

Stock-Based Compensation - Al39

Stock-Based Compensation - Allocation of Stock-Based Compensation Expense, ESPP (Details) - 2015 ESPP - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
ESPP stock-based compensation expense by statement of operations line item
Stock-based compensation expense	$ 31	$ 50	$ 68	$ 148
Other cost of revenue
ESPP stock-based compensation expense by statement of operations line item
Stock-based compensation expense	0	1	1	4
Sales and marketing
ESPP stock-based compensation expense by statement of operations line item
Stock-based compensation expense	10	13	22	41
Research and development
ESPP stock-based compensation expense by statement of operations line item
Stock-based compensation expense	16	32	34	86
General and administrative
ESPP stock-based compensation expense by statement of operations line item
Stock-based compensation expense	$ 5	$ 4	$ 11	$ 17

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
Total contractual commitments	$ 4.3
Commitments due within next year	3.7
Commitments due within one to two years	$ 0.6

Earnings Per Share (Details)

Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the calculation of weighted average common shares outstanding	1,396,921	1,179,649	1,396,921	1,179,649
Lender warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the calculation of weighted average common shares outstanding	50,000	50,000	50,000	50,000
2015 ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the calculation of weighted average common shares outstanding	34,053	34,221	34,053	34,221
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the calculation of weighted average common shares outstanding	326,073	0	326,073	0
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the calculation of weighted average common shares outstanding	986,795	1,095,428	986,795	1,095,428