Veritone (VERI) 10-Q 8 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	VERI
Entity Registrant Name	Veritone, Inc.
Entity Central Index Key	1,615,165
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		16,275,315

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 21,026	$ 29,545
Marketable securities	33,492	39,598
Accounts receivable, net of allowance for doubtful accounts of $27 and $38, respectively	9,686	7,691
Expenditures billable to clients	5,063	4,163
Prepaid expenses and other current assets	2,300	2,808
Total current assets	71,567	83,805
Property, equipment and improvements, net	2,324	680
Intangible assets, net	2,918	3,154
Other assets	919	919
Total assets	77,728	88,558
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	11,585	13,338
Accrued media payments	6,912	5,999
Client advances	5,240	3,477
Other accrued liabilities	2,845	4,442
Total current liabilities	26,582	27,256
Commitment and contingencies (Note 6)
Stockholders' equity
Common stock, par value $0.001 per share; 75,000,000 shares authorized; 16,254,054 and 16,158,883 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	16	16
Additional paid-in capital	173,817	170,728
Accumulated deficit	(122,479)	(109,307)
Accumulated other comprehensive loss	(208)	(135)
Total stockholders' equity	51,146	61,302
Total liabilities and stockholders' equity	$ 77,728	$ 88,558

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 27	$ 38
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	16,254,054	16,254,054
Common stock, shares outstanding	16,158,883	16,158,883

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net revenues	$ 4,388	$ 3,108
Cost of revenues	564	196
Gross Profit	3,824	2,912
Operating expenses
Selling and marketing expenses	5,748	2,599
Research and development expenses	4,528	3,264
General and administrative expenses	6,778	3,680
Total operating expenses	17,054	9,543
Loss from operations	(13,230)	(6,631)
Other income, net	183	786
Loss before provision for income taxes	(13,047)	(5,845)
Provision for income taxes	2	2
Net loss	(13,049)	(5,847)
Accretion of redeemable convertible preferred stock		(1,073)
Net loss attributable to common stockholders	$ (13,049)	$ (6,920)
Net loss per share attributable to common stockholders:
Basic and diluted	$ (0.81)	$ (3.09)
Weighted average shares outstanding attributable to common stockholders:
Basic and diluted	16,069,549	2,239,392
Comprehensive loss:
Net loss	$ (13,049)	$ (5,847)
Unrealized loss on marketable securities, net of income taxes	(63)
Foreign currency translation adjustments, net of income taxes	(10)
Total comprehensive loss	$ (13,122)	$ (5,847)

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (13,049)	$ (5,847)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	355	59
Provision for doubtful accounts	28	67
Amortization of debt discounts and issuance costs		2,054
Change in fair value of warrant liability		(3,118)
Share-based compensation expense	2,474	125
Changes in assets and liabilities:
Accounts receivable	(2,023)	(2,915)
Expenditures billable to clients	(900)	(1,484)
Prepaid expenses and other current assets	541	(2,111)
Accounts payable	(1,753)	4,328
Accrued media payments	913
Client advances	1,763	4,012
Other accrued liabilities	(1,597)	(282)
Net cash used in operating activities	(13,248)	(5,112)
Cash flows from investing activities:
Proceeds from sales of marketable securities	6,000
Capital expenditures	(1,693)
Intangible assets acquired	(70)	(30)
Net cash provided by (used in) investing activities	4,237	(30)
Cash flows from financing activities:
Proceeds from issuance of convertible notes payable		2,000
Common stock offering costs	(64)	(83)
Debt issuance costs		(15)
Proceeds from issuances of stock under employee stock plans	556
Other		(56)
Net cash provided by financing activities	492	1,846
Net decrease in cash and cash equivalents	(8,519)	(3,296)
Cash and cash equivalents, beginning of period	29,545	12,078
Cash and cash equivalents, end of period	$ 21,026	8,782
Non-cash financing activities:
Unpaid deferred IPO costs		$ 263

Description of Business

Description of Business	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Description of Business	Note 1. DESCRIPTION OF BUSINESS Description of Business Veritone, Inc., a Delaware corporation (“Veritone”) (together with its wholly owned subsidiaries, collectively, the “Company”), is a provider of artificial intelligence (“AI”) computing solutions. The Company has developed aiWARE TM best-of-breed In addition, the Company operates a full-service advertising agency. The Company’s expertise in media buying, planning and creative development, coupled with its proprietary technology platform, enables the Company to analyze the effectiveness of advertising in a way that is simple, scalable and trackable.

Presentation and Summary of Sig

Presentation and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Presentation and Summary of Significant Accounting Policies	NOTE 2. PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Preparation The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial statements and the rules and regulations of the Securities and Exchange Commission (the “SEC”). Accordingly, they do not contain all information and footnotes required by GAAP for annual financial statements. Such unaudited condensed consolidated financial statements and accompanying notes are the representations of the Company’s management, who is responsible for their integrity and objectivity. The information included in this Form 10-Q 10-K The accompanying condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and, in the opinion of management, reflect all adjustments, which are normal and recurring, necessary to fairly state its financial position, results of operations and cash flows. All significant intercompany transactions have been eliminated in consolidation. The financial data and the other information disclosed in these notes to the condensed consolidated financial statements reflected in the three-month periods presented are unaudited. The December 31, 2017 balance sheet included herein was derived from the audited financial statements but does not include all disclosures or notes required by GAAP for complete financial statements. Use of Accounting Estimates The preparation of the accompanying condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the accompanying condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The principal estimates relate to revenue recognition, allowance for doubtful accounts, and the valuation of stock awards and stock warrants. Actual results could differ from those estimates. Concentration of Risk The Company’s ten largest customers by revenue accounted for approximately 58.7% and 76.6% of its net revenues in the three months ended March 31, 2018 and 2017, respectively. Significant Accounting Policies Beginning in the first quarter of 2018, the Company adopted Accounting Standards Update (“ASU”) No. 2016-09, 2016-09)”. There were no other material changes in the Company’s significant accounting policies from those disclosed in its Annual Report on Form 10-K Reclassifications Certain reclassifications have been made to prior year amounts for consistency and to enhance comparability with the current year’s financial statements presentation. There was no impact on total assets, total stockholders’ equity, accumulated deficit, or net loss resulting from these reclassifications. Earnings Per Share The following table presents the computation of basic and diluted net loss per share attributable to common stockholders: Three Months Ended March 31, 2018 2017 Numerator Net Loss (13,049 ) (5,847 ) Accretion of redeemable convertible preferred stock — (1,073 ) Net loss attributable to common stockholders $ (13,049 ) $ (6,920 ) Denominator Weighted-average common shares outstanding 16,208,692 2,577,919 Less: Weighted-average shares subject to repurchase (139,143 ) (338,527 ) Denominator for basic and diluted net loss per share attributable to common stockholders 16,069,549 2,239,392 Basic and diluted net loss per share attributable to common stockholders $ (0.81 ) $ (3.09 ) Potentially dilutive securities that were not included in the calculation of diluted net loss per share attributable to common stockholders because their effect would be anti-dilutive are as follows (in common equivalent shares): Three Months Ended March 31, 2018 2017 Common stock options and restricted stock units 4,703,801 656,116 Warrants to purchase common stock 1,524,573 2,383,815 Shares issuable upon conversion of the Acacia Note — 1,512,392 Shares issuable upon conversion of Bridge Loan — 147,302 Shares issuable upon conversion of redeemable convertible preferred stock — 5,181,416 6,228,374 9,881,041 Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2014-09, 2014-09), 2014-09 2014-09: No. 2016-08, 2016-08); No. 2016-10, 2016-10); No. 2016-12, 2016-12). 2016-08, 2016-10 2016-12 2014-09 In February 2016, the FASB issued ASU No. 2016-02, right-of-use right-of-use In August 2016, the FASB issued ASU 2016-15,

Financial Instruments

Financial Instruments	3 Months Ended
	Mar. 31, 2018
Investments, All Other Investments [Abstract]
Financial Instruments	NOTE 3. FINANCIAL INSTRUMENTS Cash and Cash Equivalents and Marketable Securities The Company’s money market funds and marketable securities are categorized as Level 1 and 2, respectively, within the fair value hierarchy. The following table shows the cost, gross unrealized losses and fair value, with a breakdown by significant investment category, of the Company’s cash and cash equivalents and marketable securities as of March 31, 2018: Cost Gross Unrealized Losses Fair Value Cash and Cash Equivalents Marketable Securities Cash $ 4,590 $ — $ 4,590 $ 4,590 $ — Level 1: Money market funds 16,436 — 16,436 16,436 — Level 2: U.S. government securities 4,501 (19 ) 4,482 — 4,482 Commercial paper 2,992 (5 ) 2,987 — 2,987 Corporate debt securities 26,196 (173 ) 26,023 — 26,023 Corporate securities 33,689 (197 ) 33,492 — 33,492 Total $ 54,715 $ (197 ) $ 54,518 $ 21,026 $ 33,492 As of December 31, 2017, the Company’s cash and cash equivalents and marketable securities balances were as follows: Cost Gross Unrealized Losses Fair Value Cash and Cash Equivalents Marketable Securities Cash $ 8,925 $ — $ 8,925 $ 8,925 $ — Level 1: Money market funds 20,620 — 20,620 20,620 — Level 2: U.S. government securities 4,505 (17 ) 4,488 — 4,488 Commercial paper 4,959 (5 ) 4,954 — 4,954 Corporate debt securities 30,268 (112 ) 30,156 — 30,156 Corporate securities 39,732 (134 ) 39,598 — 39,598 Total $ 69,277 $ (134 ) $ 69,143 $ 29,545 $ 39,598 The Company may sell certain of its marketable securities prior to their stated maturities for strategic reasons including, but not limited to, anticipation of credit deterioration and duration management. As of March 31, 2018, the Company considered the declines in market value of its marketable securities to be temporary in nature. The Company typically invests in highly-rated securities, and its investment policy generally limits the amounts that may be invested with any one issuer. The policy generally requires investments to be investment grade, with the primary objective of minimizing the potential risk of principal loss. Fair values were determined for each individual security in the securities portfolio. Stock Warrants The Company’s stock warrants are categorized as Level 3 within the fair value hierarchy. Stock warrants have been recorded at their fair value using a probability weighted expected return model. This model incorporates contractual terms, maturity, risk-free rates and volatility. The value of the Company’s stock warrants would increase if a higher risk-free interest rate was used, and the value of the Company’s stock warrants would decrease if a lower risk-free interest rate was used. Similarly, a higher volatility assumption would increase the value of the stock warrants, and a lower volatility assumption would decrease the value of the stock warrants. The development and determination of the unobservable inputs for Level 3 fair value measurements and fair value calculations are the responsibility of the Company’s management with the assistance of a third-party valuation specialist. In 2016, in connection with the Investment Agreement between the Company and Acacia Research Corporation (“Acacia”) and the convertible secured promissory note issued by the Company to Acacia (the “Acacia Note”), the Company issued three four-year warrants (the “Acacia Note Warrants”) and a five-year warrant (the “Primary Warrant”). In March 2017, each of the Primary Warrant and the Acacia Note Warrants was amended to provide that the exercise prices thereof shall be equal to the lower of $13.6088 or the Company’s IPO price per share. The following table summarizes quantitative information with respect to the significant unobservable inputs that were used to value these stock warrants that were modified in the three months ended March 31, 2017. These inputs are categorized as Level 3 within the fair value hierarchy: March 31, 2017 Volatility 65% Risk-free rate 0.92% - 1.64% Discount for lack of marketability 10% The following table represents a rollforward of the fair value of the Primary Warrant in the three months ended March 31, 2017: Balance, December 31, 2016 $ 7,114 Less: Change in fair value of warrant liability (3,118 ) Balance, March 31, 2017 $ 3,996 In the first quarter of 2017, the total fair value of the Acacia Note Warrants increased by $334 to $841. In March 2017, the Company entered into a Note Purchase Agreement with Acacia and Veritone LOC I, LLC (“VLOC”), (collectively the “Bridge Loan Lenders”), which provided for an $8 million line of credit pursuant to secured convertible notes (the “Bridge Loan”). In connection with the funding of the Bridge Loan in March 2017, the Company issued to the Bridge Loan Lenders warrants to purchase shares of the Company’s common stock. The following table summarizes quantitative information with respect to the significant unobservable inputs used for the valuation of the Company’s warrants which were issued to the Bridge Loan Lenders; these inputs are categorized as Level 3 within the fair value hierarchy: Volatility 70 % Risk-free rate 2.40 % Discount for lack of marketability 10 % The fair value of the Bridge Loan Warrants was $549 as of March 31, 2017.

Intangible Assets, Net

Intangible Assets, Net	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, Net	NOTE 4. INTANGIBLE ASSETS, NET Intangible assets, net consisted of the following: As of March 31, December 31, Acquired software and technology $ 3,074 $ 3,004 Capitalized software 471 471 Other 30 30 3,575 3,505 Less: accumulated amortization (657 ) (351 ) Intangible assets, net $ 2,918 $ 3,154 These definite-lived assets will be amortized over a period of three years. During the three months ended March 31, 2018 and 2017, the Company recorded amortization expense of $306 and $48, respectively, related to these definite-lived assets.

Consolidated Financial Statemen

Consolidated Financial Statements Details	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated Financial Statements Details	NOTE 5. CONSOLIDATED FINANCIAL STATEMENTS DETAILS Consolidated Balance Sheets Details Property, Equipment and Improvements, Net Property, equipment and improvements, net consisted of the following: As of March 31, December 31, Property and equipment $ 539 $ 378 Leasehold improvements 1,994 27 Construction in progress — 435 2,533 840 Less: accumulated depreciation (209 ) (160 ) Property, equipment and improvements, net $ 2,324 $ 680 The construction in progress balance at December 31, 2017 consisted primarily of expenditures related to the build out of office space at the Company’s headquarters, which was completed in March 2018. Depreciation expense was $49 and $52 for the three months ended March 31, 2018 and 2017, respectively. Other Accrued Liabilities Other accrued liabilities were comprised of the following: As of March 31, December 31, Accrued compensation and benefits $ 1,908 $ 3,117 Other 937 1,325 Total $ 2,845 $ 4,442 Consolidated Statement of Operations and Comprehensive Loss Details Net Revenues Net revenues for the periods presented were comprised of the following: Three Months Ended March 31, 2018 2017 Media agency revenues $ 3,121 $ 2,899 AI platform revenues 1,267 209 Total net revenues $ 4,388 $ 3,108 During the three months ended March 31, 2018 and 2017, the Company made $29,420 and $26,723, respectively, in gross media placements, of which $25,573 and $19,423, respectively, were billed directly to clients. Of the amounts billed directly to clients, $22,510 and $16,524 represented media-related costs netted against billings during the three months ended March 31, 2018 and 2017, respectively. Other Income, Net Other income, net for the periods presented were comprised of the following: Three Months Ended March 31, 2018 2017 Interest expense $ — $ (2,355 ) Interest income 181 1 Gain on fair value change of warrant liability — 3,118 Other 2 22 Other income, net $ 183 $ 786 Interest expense for the three months ended March 31, 2017 included amortization of deferred debt discounts and issuance costs of $2,054 related to the Company’s convertible notes payable.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 6. COMMITMENTS AND CONTINGENCIES Employment Agreements In March 2017, the Company entered into a three-year employment agreement with Chad Steelberg, the Company’s Chief Executive Officer, pursuant to which the Company agreed to issue to Mr. Steelberg as compensation at the end of each calendar quarter during the term of the agreement (following March 31, 2017) a number of shares of common stock calculated by dividing $125 by the fair market value (as defined in the agreement) of the Company’s common stock. In March 2018, the Compensation Committee of the Board of Directors of the Company approved a base salary and target bonus for Mr. Steelberg for 2018, which amended the compensation terms of his employment agreement. As a result, Mr. Steelberg now receives an annual cash base salary of $250, and the Company is no longer required to issue stock to him on a quarterly basis. Other Contingencies From time to time, the Company may be involved in legal proceedings arising from the ordinary course of its business. In the opinion of management, the Company has not incurred a material loss with respect to loss contingencies for asserted legal and other claims.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Stockholders' Equity	NOTE 7. STOCKHOLDERS’ EQUITY Common Stock Warrants As of March 31, 2018 and December 31, 2017, warrants to purchase the Company’s common stock in the aggregate of 1,524,573 were outstanding, of which 652,122 warrants had not yet vested.

Stock Plans

Stock Plans	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Plans	NOTE 8. STOCK PLANS Stock-Based Compensation The Company’s stock-based compensation expense recognized for the periods presented was as follows: Three Months Ended March 31, 2018 2017 Stock-based compensation expense by type of award: Restricted stock $ 48 $ 76 Restricted stock units 218 — Stock options 2,036 49 Employee stock purchase plan 172 — Total $ 2,474 $ 125 Stock-based compensation expense by operating expense grouping: Sales and marketing $ 320 $ 39 Research and development 241 12 General and administrative 1,913 74 $ 2,474 $ 125 Restricted Stock The Company’s restricted stock activity for the three months ended March 31, 2018 was as follows: Shares Weighted Unvested at December 31, 2017 147,456 $ 6.30 Granted — $ — Forfeited (1,750 ) $ 7.50 Vested (13,809 ) $ 3.17 Unvested at March 31, 2018 131,897 $ 6.61 At March 31, 2018, total unrecognized compensation cost related to restricted stock was $742, which is expected to be recognized over a period of 2.1 years. Restricted Stock Units The Company’s restricted stock units activity for the three months ended March 31, 2018 was as follows: Shares Average Grant Unvested at December 31, 2017 35,576 $ 14.76 Granted 11,137 $ 14.69 Forfeited — $ — Vested (5,568 ) $ 14.69 Unvested at March 31, 2018 41,145 $ 14.75 As of March 31, 2018, total unrecognized compensation cost related to restricted stock units was $143, which is expected to be recognized over a period of 0.4 year. Stock Options The Company’s stock option activity for the three months ended March 31, 2018 was as follows: Weighted-Average Options Exercise Remaining Aggregate Outstanding at December 31, 2017 4,802,594 $ 13.89 9.17 years $ 44,974 Granted 433,341 $ 15.02 Exercised (55,541 ) $ 1.80 Forfeited (245,238 ) $ 17.46 Expired (1,425 ) $ 12.24 Outstanding at March 31, 2018 4,933,731 $ 13.95 9.03 years $ 6,006 Exercisable at March 31, 2018 1,978,465 $ 12.80 8.71 years $ 3,992 The aggregate intrinsic values in the table above represents the difference between the fair market value of the Company’s common stock and the average option exercise price of in-the-money Employee Stock Purchase Plan On January 31, 2018, a total of 35,812 shares of common stock were purchased under the Company’s Employee Stock Purchase Plan. As of March 31, 2018, accrued employee contributions for future purchases under the Employee Stock Purchase Plan totaled $213.

Presentation and Summary of S14

Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Preparation	Basis of Presentation and Preparation The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial statements and the rules and regulations of the Securities and Exchange Commission (the “SEC”). Accordingly, they do not contain all information and footnotes required by GAAP for annual financial statements. Such unaudited condensed consolidated financial statements and accompanying notes are the representations of the Company’s management, who is responsible for their integrity and objectivity. The information included in this Form 10-Q 10-K The accompanying condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and, in the opinion of management, reflect all adjustments, which are normal and recurring, necessary to fairly state its financial position, results of operations and cash flows. All significant intercompany transactions have been eliminated in consolidation. The financial data and the other information disclosed in these notes to the condensed consolidated financial statements reflected in the three-month periods presented are unaudited. The December 31, 2017 balance sheet included herein was derived from the audited financial statements but does not include all disclosures or notes required by GAAP for complete financial statements.
Use of Accounting Estimates	Use of Accounting Estimates The preparation of the accompanying condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the accompanying condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The principal estimates relate to revenue recognition, allowance for doubtful accounts, and the valuation of stock awards and stock warrants. Actual results could differ from those estimates.
Concentration of Risk	Concentration of Risk The Company’s ten largest customers by revenue accounted for approximately 58.7% and 76.6% of its net revenues in the three months ended March 31, 2018 and 2017, respectively.
Significant Accounting Policies	Significant Accounting Policies Beginning in the first quarter of 2018, the Company adopted Accounting Standards Update (“ASU”) No. 2016-09, 2016-09)”. There were no other material changes in the Company’s significant accounting policies from those disclosed in its Annual Report on Form 10-K
Reclassifications	Reclassifications Certain reclassifications have been made to prior year amounts for consistency and to enhance comparability with the current year’s financial statements presentation. There was no impact on total assets, total stockholders’ equity, accumulated deficit, or net loss resulting from these reclassifications.
Earnings Per Share	Earnings Per Share The following table presents the computation of basic and diluted net loss per share attributable to common stockholders: Three Months Ended March 31, 2018 2017 Numerator Net Loss (13,049 ) (5,847 ) Accretion of redeemable convertible preferred stock — (1,073 ) Net loss attributable to common stockholders $ (13,049 ) $ (6,920 ) Denominator Weighted-average common shares outstanding 16,208,692 2,577,919 Less: Weighted-average shares subject to repurchase (139,143 ) (338,527 ) Denominator for basic and diluted net loss per share attributable to common stockholders 16,069,549 2,239,392 Basic and diluted net loss per share attributable to common stockholders $ (0.81 ) $ (3.09 ) Potentially dilutive securities that were not included in the calculation of diluted net loss per share attributable to common stockholders because their effect would be anti-dilutive are as follows (in common equivalent shares): Three Months Ended March 31, 2018 2017 Common stock options and restricted stock units 4,703,801 656,116 Warrants to purchase common stock 1,524,573 2,383,815 Shares issuable upon conversion of the Acacia Note — 1,512,392 Shares issuable upon conversion of Bridge Loan — 147,302 Shares issuable upon conversion of redeemable convertible preferred stock — 5,181,416 6,228,374 9,881,041
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2014-09, 2014-09), 2014-09 2014-09: No. 2016-08, 2016-08); No. 2016-10, 2016-10); No. 2016-12, 2016-12). 2016-08, 2016-10 2016-12 2014-09 In February 2016, the FASB issued ASU No. 2016-02, right-of-use right-of-use In August 2016, the FASB issued ASU 2016-15,

Presentation and Summary of S15

Presentation and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Computation of Basic and Diluted Net Loss Per Common Share	The following table presents the computation of basic and diluted net loss per share attributable to common stockholders: Three Months Ended March 31, 2018 2017 Numerator Net Loss (13,049 ) (5,847 ) Accretion of redeemable convertible preferred stock — (1,073 ) Net loss attributable to common stockholders $ (13,049 ) $ (6,920 ) Denominator Weighted-average common shares outstanding 16,208,692 2,577,919 Less: Weighted-average shares subject to repurchase (139,143 ) (338,527 ) Denominator for basic and diluted net loss per share attributable to common stockholders 16,069,549 2,239,392 Basic and diluted net loss per share attributable to common stockholders $ (0.81 ) $ (3.09 )
Effect of Anti-dilutive Securities	Potentially dilutive securities that were not included in the calculation of diluted net loss per share attributable to common stockholders because their effect would be anti-dilutive are as follows (in common equivalent shares): Three Months Ended March 31, 2018 2017 Common stock options and restricted stock units 4,703,801 656,116 Warrants to purchase common stock 1,524,573 2,383,815 Shares issuable upon conversion of the Acacia Note — 1,512,392 Shares issuable upon conversion of Bridge Loan — 147,302 Shares issuable upon conversion of redeemable convertible preferred stock — 5,181,416 6,228,374 9,881,041

Financial Instruments (Tables)

Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Investments, All Other Investments [Abstract]
Schedule of Cash and Available-For-Sale Securities' Cost, Gross Unrealized Losses and Fair Value by Significant Investment Category	The following table shows the cost, gross unrealized losses and fair value, with a breakdown by significant investment category, of the Company’s cash and cash equivalents and marketable securities as of March 31, 2018: Cost Gross Unrealized Losses Fair Value Cash and Cash Equivalents Marketable Securities Cash $ 4,590 $ — $ 4,590 $ 4,590 $ — Level 1: Money market funds 16,436 — 16,436 16,436 — Level 2: U.S. government securities 4,501 (19 ) 4,482 — 4,482 Commercial paper 2,992 (5 ) 2,987 — 2,987 Corporate debt securities 26,196 (173 ) 26,023 — 26,023 Corporate securities 33,689 (197 ) 33,492 — 33,492 Total $ 54,715 $ (197 ) $ 54,518 $ 21,026 $ 33,492 As of December 31, 2017, the Company’s cash and cash equivalents and marketable securities balances were as follows: Cost Gross Unrealized Losses Fair Value Cash and Cash Equivalents Marketable Securities Cash $ 8,925 $ — $ 8,925 $ 8,925 $ — Level 1: Money market funds 20,620 — 20,620 20,620 — Level 2: U.S. government securities 4,505 (17 ) 4,488 — 4,488 Commercial paper 4,959 (5 ) 4,954 — 4,954 Corporate debt securities 30,268 (112 ) 30,156 — 30,156 Corporate securities 39,732 (134 ) 39,598 — 39,598 Total $ 69,277 $ (134 ) $ 69,143 $ 29,545 $ 39,598
Summary of Quantitative Information with Respect to Significant Unobservable Inputs	The following table summarizes quantitative information with respect to the significant unobservable inputs that were used to value these stock warrants that were modified in the three months ended March 31, 2017. These inputs are categorized as Level 3 within the fair value hierarchy: March 31, 2017 Volatility 65% Risk-free rate 0.92% - 1.64% Discount for lack of marketability 10% The following table summarizes quantitative information with respect to the significant unobservable inputs used for the valuation of the Company’s warrants which were issued to the Bridge Loan Lenders; these inputs are categorized as Level 3 within the fair value hierarchy: Volatility 70 % Risk-free rate 2.40 % Discount for lack of marketability 10 %
Reconciliation of Level 3 Measurement of Company's Primary Warrant	The following table represents a rollforward of the fair value of the Primary Warrant in the three months ended March 31, 2017: Balance, December 31, 2016 $ 7,114 Less: Change in fair value of warrant liability (3,118 ) Balance, March 31, 2017 $ 3,996

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets, Net	Intangible assets, net consisted of the following: As of March 31, December 31, Acquired software and technology $ 3,074 $ 3,004 Capitalized software 471 471 Other 30 30 3,575 3,505 Less: accumulated amortization (657 ) (351 ) Intangible assets, net $ 2,918 $ 3,154

Consolidated Financial Statem18

Consolidated Financial Statements Details (Tables)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Property Equipment and Improvements, Net	Property, equipment and improvements, net consisted of the following: As of March 31, December 31, Property and equipment $ 539 $ 378 Leasehold improvements 1,994 27 Construction in progress — 435 2,533 840 Less: accumulated depreciation (209 ) (160 ) Property, equipment and improvements, net $ 2,324 $ 680
Summary of Other Accrued Liabilities	Other accrued liabilities were comprised of the following: As of March 31, December 31, Accrued compensation and benefits $ 1,908 $ 3,117 Other 937 1,325 Total $ 2,845 $ 4,442
Summary of Net Revenues	Net revenues for the periods presented were comprised of the following: Three Months Ended March 31, 2018 2017 Media agency revenues $ 3,121 $ 2,899 AI platform revenues 1,267 209 Total net revenues $ 4,388 $ 3,108
Schedule of Other Income, Net	Other income, net for the periods presented were comprised of the following: Three Months Ended March 31, 2018 2017 Interest expense $ — $ (2,355 ) Interest income 181 1 Gain on fair value change of warrant liability — 3,118 Other 2 22 Other income, net $ 183 $ 786

Stock Plans (Tables)

Stock Plans (Tables)	3 Months Ended
	Mar. 31, 2018
Schedule of Stock-based Compensation Expense	The Company’s stock-based compensation expense recognized for the periods presented was as follows: Three Months Ended March 31, 2018 2017 Stock-based compensation expense by type of award: Restricted stock $ 48 $ 76 Restricted stock units 218 — Stock options 2,036 49 Employee stock purchase plan 172 — Total $ 2,474 $ 125 Stock-based compensation expense by operating expense grouping: Sales and marketing $ 320 $ 39 Research and development 241 12 General and administrative 1,913 74 $ 2,474 $ 125
Schedule of Restricted Stock Activity	The Company’s restricted stock units activity for the three months ended March 31, 2018 was as follows: Shares Average Grant Unvested at December 31, 2017 35,576 $ 14.76 Granted 11,137 $ 14.69 Forfeited — $ — Vested (5,568 ) $ 14.69 Unvested at March 31, 2018 41,145 $ 14.75
Schedule of Stock Option Activity	The Company’s stock option activity for the three months ended March 31, 2018 was as follows: Weighted-Average Options Exercise Remaining Aggregate Outstanding at December 31, 2017 4,802,594 $ 13.89 9.17 years $ 44,974 Granted 433,341 $ 15.02 Exercised (55,541 ) $ 1.80 Forfeited (245,238 ) $ 17.46 Expired (1,425 ) $ 12.24 Outstanding at March 31, 2018 4,933,731 $ 13.95 9.03 years $ 6,006 Exercisable at March 31, 2018 1,978,465 $ 12.80 8.71 years $ 3,992
Restricted Stock Units [Member]
Schedule of Restricted Stock Activity	The Company’s restricted stock activity for the three months ended March 31, 2018 was as follows: Shares Weighted Unvested at December 31, 2017 147,456 $ 6.30 Granted — $ — Forfeited (1,750 ) $ 7.50 Vested (13,809 ) $ 3.17 Unvested at March 31, 2018 131,897 $ 6.61

Presentation and Summary of S20

Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)Customers	Mar. 31, 2017	Dec. 31, 2017USD ($)
Organization [Line Items]
Cumulative impact to retained earnings	$ (122,479)		$ (109,307)
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Organization [Line Items]
Number of major customers | Customers	10
Concentration risk percentage	58.70%	76.60%
Accounting Standards Update 2016-09 [Member]
Organization [Line Items]
Cumulative impact to retained earnings	$ 123

Presentation and Summary of S21

Presentation and Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Loss Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator
Net loss	$ (13,049)	$ (5,847)
Accretion of redeemable convertible preferred stock		(1,073)
Net loss attributable to common stockholders	$ (13,049)	$ (6,920)
Denominator
Weighted-average common shares outstanding	16,208,692	2,577,919
Less: Weighted-average shares subject to repurchase	(139,143)	(338,527)
Denominator for basic and diluted net loss per share attributable to common stockholders	16,069,549	2,239,392
Basic and diluted net loss per share attributable to common stockholders	$ (0.81)	$ (3.09)

Presentation and Summary of S22

Presentation and Summary of Significant Accounting Policies - Effect of Anti-dilutive Securities (Detail) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	6,228,374	9,881,041
Redeemable Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities		5,181,416
Employee Stock Option and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	4,703,801	656,116
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	1,524,573	2,383,815
Conversion of Convertible Note Payable [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities		1,512,392
Bridge Loan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities		147,302

Financial Instruments - Schedul

Financial Instruments - Schedule of Cash and Available-For-Sale Securities' Cost, Gross Unrealized Losses and Fair Value by Significant Investment Category (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 54,715	$ 69,277
Gross Unrealized Losses	(197)	(134)
Fair Value	54,518	69,143
Cash and cash equivalents	21,026	29,545	$ 8,782	$ 12,078
Marketable securities	33,492	39,598
Cash [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	4,590	8,925
Fair Value	4,590	8,925
Cash and cash equivalents	4,590	8,925
Level 1 [Member] | Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	16,436	20,620
Fair Value	16,436	20,620
Cash and cash equivalents	16,436	20,620
U.S. Government Securities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	4,501	4,505
Gross Unrealized Losses	(19)	(17)
Fair Value	4,482	4,488
Marketable securities	4,482	4,488
Commercial Papers [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	2,992	4,959
Gross Unrealized Losses	(5)	(5)
Fair Value	2,987	4,954
Marketable securities	2,987	4,954
Corporate Debt Securities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	26,196	30,268
Gross Unrealized Losses	(173)	(112)
Fair Value	26,023	30,156
Marketable securities	26,023	30,156
Corporate Securities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	33,689	39,732
Gross Unrealized Losses	(197)	(134)
Fair Value	33,492	39,598
Marketable securities	$ 33,492	$ 39,598

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Mar. 31, 2017
Convertible Notes Payable [Member] | Acacia [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of warrants issued	3
Warrants maturity period	4 years
Primary Warrant [Member] | Acacia [Member]
Schedule of Available-for-sale Securities [Line Items]
Warrants maturity period	5 years
Amended Primary and Acacia Note Warrants [Member] | Initial Public Offering [Member]
Schedule of Available-for-sale Securities [Line Items]
Warrant exercise price		$ 13.6088
Minimum [Member] | Acacia Note Warrants [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of warrants		$ 334,000
Maximum [Member] | Acacia Note Warrants [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of warrants		841,000
Bridge Loan [Member] | Acacia [Member]
Schedule of Available-for-sale Securities [Line Items]
Line of credit maximum borrowing capacity		$ 8,000,000

Financial Instruments - Summary

Financial Instruments - Summary of Quantitative Information with Respect to Significant Unobservable Inputs (Detail)	3 Months Ended
	Mar. 31, 2017
Stock Warrant [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Volatility	65.00%
Discount for lack of marketability	10.00%
Minimum [Member] | Stock Warrant [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Risk-free rate	0.92%
Maximum [Member] | Stock Warrant [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Risk-free rate	1.64%
Bridge Loan [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Volatility	70.00%
Risk-free rate	2.40%
Discount for lack of marketability	10.00%

Financial Instruments - Reconci

Financial Instruments - Reconciliation of Level 3 Measurement of Company's Primary Warrant (Detail) - Warrant [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning, Balance	$ 7,114
Change in fair value of warrant liability	(3,118)
Ending, Balance	$ 3,996

Intangible Assets, Net - Summar

Intangible Assets, Net - Summary of Intangible Assets, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 3,575	$ 3,505
Less: accumulated amortization	(657)	(351)
Intangible assets, net	2,918	3,154
Acquired Software and Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	3,074	3,004
Capitalized Software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	471	471
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 30	$ 30

Intangible Assets, Net - Additi

Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Definite-lived assets amortization period	3 years
Amortization expense of definite-lived assets	$ 306	$ 48

Consolidated Financial Statem29

Consolidated Financial Statements Details - Summary of Property Equipment and Improvements, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property and equipment	$ 539	$ 378
Leasehold improvements	1,994	27
Construction in progress		435
Property, equipment and improvements, gross	2,533	840
Less: accumulated depreciation	(209)	(160)
Property, equipment and improvements, net	$ 2,324	$ 680

Consolidated Financial Statem30

Consolidated Financial Statements Details - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Depreciation Expense	$ 49	$ 52
Gross media placements	29,420	26,723
Cost of revenues	564	196
Amortization of deferred debt discounts and issuance costs		2,054
Convertible Notes Payable [Member]
Condensed Financial Statements, Captions [Line Items]
Amortization of deferred debt discounts and issuance costs		2,054
Billed Revenues [Member]
Condensed Financial Statements, Captions [Line Items]
Gross media placements	25,573	19,423
Netted Against Billings [Member]
Condensed Financial Statements, Captions [Line Items]
Cost of revenues	$ 22,510	$ 16,524

Consolidated Financial Statem31

Consolidated Financial Statements Details - Summary of Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accrued Liabilities and Other Liabilities [Abstract]
Accrued compensation and benefits	$ 1,908	$ 3,117
Other	937	1,325
Total	$ 2,845	$ 4,442

Consolidated Financial Statem32

Consolidated Financial Statements Details - Summary of Net Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Total net revenues	$ 4,388	$ 3,108
Media Agency Revenues [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Total net revenues	3,121	2,899
AI Platform Revenues [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Total net revenues	$ 1,267	$ 209

Consolidated Financial Statem33

Consolidated Financial Statements Details - Schedule of Other Income, Net (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Income and Expenses [Abstract]
Interest expense		$ (2,355)
Interest income	$ 181	1
Gain on fair value change of warrant liability		3,118
Other	2	22
Other income, net	$ 183	$ 786

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - Chad Steelberg [Member] - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2018
Other Commitments [Line Items]
Estimated common stock calculated value	$ 125
Annual salary under agreement		$ 250

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - shares	Mar. 31, 2018	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Warrants outstanding	1,524,573	1,524,573
Warrants unvested	652,122	652,122

Stock Plans - Schedule of Stock

Stock Plans - Schedule of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 2,474	$ 125
Sales and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	320	39
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	241	12
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	1,913	74
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	172
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	48	76
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	218
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 2,036	$ 49

Stock Plans - Schedule of Restr

Stock Plans - Schedule of Restricted Stock Activity (Detail) - 2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member] - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Unvested, Beginning Balance | shares	147,456
Shares, Granted | shares	0
Shares, Forfeited | shares	(1,750)
Shares, Vested | shares	(13,809)
Shares, Unvested, Ending Balance | shares	131,897
Weighted Average Grant Date Fair Value, Unvested, Beginning Balance | $ / shares	$ 6.30
Weighted Average Grant Date Fair Value, Granted | $ / shares	0
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	7.50
Weighted Average Grant Date Fair Value, Vested | $ / shares	3.17
Weighted Average Grant Date Fair Value, Unvested, Ending Balance | $ / shares	$ 6.61

Stock Plans - Additional Inform

Stock Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Accrued employee contributions		$ 1,908	$ 3,117
2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member]
Class of Stock [Line Items]
Unrecognized compensation expense related to stock options		23,339
Employee Stock Purchase Plan [Member]
Class of Stock [Line Items]
Common stock granted	35,812
Accrued employee contributions		213
Restricted Stock [Member] | 2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member]
Class of Stock [Line Items]
Unrecognized cost of share-based compensation awards		$ 742
Cost of share-based compensation awards, recognition period		2 years 1 month 6 days
Restricted Stock Units [Member] | 2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member]
Class of Stock [Line Items]
Unrecognized cost of share-based compensation awards		$ 143
Cost of share-based compensation awards, recognition period		4 months 24 days
Stock Options [Member]
Class of Stock [Line Items]
Weighted Average Grant Date Fair Value, Granted		$ 7.91
Aggregate intrinsic value of the options exercised		$ 692
Total grant date fair value of stock options vested		$ 1,761
Stock Options [Member] | 2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member]
Class of Stock [Line Items]
Cost of share-based compensation awards, recognition period		2 years 8 months 12 days

Stock Plans - Schedule of Res39

Stock Plans - Schedule of Restricted Stock Units (Detail) - 2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member] - Restricted Stock Units [Member]	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Unvested, Beginning Balance | shares	35,576
Shares, Granted | shares	11,137
Shares, Forfeited | shares	0
Shares, Vested | shares	(5,568)
Shares, Unvested, Ending Balance | shares	41,145
Weighted Average Grant Date Fair Value, Unvested, Beginning Balance | $ / shares	$ 14.76
Weighted Average Grant Date Fair Value, Granted | $ / shares	14.69
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	0
Weighted Average Grant Date Fair Value, Vested | $ / shares	14.69
Weighted Average Grant Date Fair Value, Unvested, Ending Balance | $ / shares	$ 14.75

Stock Plans - Schedule of Sto40

Stock Plans - Schedule of Stock Option Activity (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Aggregate Intrinsic Value	$ 6,006	$ 44,974
Weighted-Average Aggregate Intrinsic Value, Exercisable	$ 3,992
2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding, Beginning Balance	4,802,594
Options Granted	433,341
Options Exercised	(55,541)
Options Forfeited	(245,238)
Options Expired	(1,425)
Options, Outstanding, Ending Balance	4,933,731	4,802,594
Options,Exercisable at December 31, 2017	1,978,465
Weighted-Average Exercise Price, Outstanding, Beginning Balance	$ 13.89
Weighted-Average Exercise Price, Options Granted	15.02
Weighted-Average Exercise Price, Options Exercised	1.80
Weighted-Average Exercise Price, Options Forfeited	17.46
Weighted-Average Exercise Price, Options Expired	12.24
Weighted-Average Exercise Price, Outstanding, Ending Balance	13.95	$ 13.89
Weighted-Average Exercise Price, Exercisable	$ 12.80
Weighted-Average Remaining Contractual Term, Outstanding	9 years 11 days	9 years 2 months 1 day
Weighted-Average Remaining Exercisable	8 years 8 months 16 days