Veritone (VERI) 10-K 9 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Feb. 28, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	VERI
Entity Registrant Name	Veritone, Inc.
Entity Central Index Key	1,615,165
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		16,222,731
Entity Public Float			$ 60

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 29,545	$ 12,078
Marketable securities	39,598
Accounts receivable, net of allowance for doubtful accounts of $38 and $0, respectively	7,691	4,834
Expenditures billable to clients	4,163	3,384
Prepaid expenses and other current assets	2,808	1,071
Total current assets	83,805	21,367
Property, equipment and improvements, net	680	68
Intangible assets, net	3,026
Other assets	1,047	913
Total assets	88,558	22,348
LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK, AND STOCKHOLDERS' EQUITY (DEFICIT)
Accounts payable	13,338	12,321
Accrued media payments	5,999	6,777
Client advances	3,477	1,841
Other accrued liabilities	4,442	3,060
Convertible note payable, net of discounts and issuance costs of $0 and $6,898, respectively		13,388
Warrant liability		7,114
Total current liabilities	27,256	44,501
Other liabilities		22
Total liabilities	27,256	44,523
Commitments and contingencies (Note 7)
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		23,350
Stockholders' equity (deficit):
Preferred stock, par value $0.001 per share, 1,000,000 shares authorized at December 31, 2017; no shares issued and outstanding at December 31, 2017
Common stock, par value $0.001 per share; 75,000,000 and 38,500,000 shares authorized at December 31, 2017 and 2016, respectively; 16,158,883 and 2,620,803 shares issued and outstanding at December 31, 2017 and 2016, respectively	16	4
Additional paid-in capital	170,728	(293)
Accumulated deficit	(109,307)	(45,236)
Accumulated other comprehensive loss	(135)
Total stockholders' equity (deficit)	61,302	(45,525)
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)	$ 88,558	22,348
Series B Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		17,897
Series A Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		$ 5,453

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts	$ 38	$ 0
Convertible note payable, discounts	$ 0	$ 6,898
Preferred stock, par value	$ 0.001
Preferred stock, shares authorized	1,000,000
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	38,500,000
Common stock, shares issued	16,158,883	16,158,883
Common stock, shares outstanding	2,620,803	2,620,803
Series B Redeemable Convertible Preferred Stock [Member]
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, authorized	0	3,092,781
Preferred Stock, issued	0	3,092,781
Preferred Stock, outstanding	0	3,092,781
Preferred Stock, liquidation preference		$ 18,138
Series A Redeemable Convertible Preferred Stock [Member]
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, authorized	0	5,666,667
Preferred Stock, issued	0	3,914,697
Preferred Stock, outstanding	0	3,914,697
Preferred Stock, liquidation preference		$ 8,353

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net revenues	$ 14,413	$ 8,911
Cost of revenues	1,070	1,577
Gross profit	13,343	7,334
Operating expenses:
Sales and marketing	14,699	8,279
Research and development	13,970	7,900
General and administrative	31,436	14,935
Total operating expenses	60,105	31,114
Loss from operations	(46,762)	(23,780)
Other expense, net	(12,833)	(3,193)
Loss before provision for income taxes	(59,595)	(26,973)
Provision for income taxes	6	6
Net loss	(59,601)	(26,979)
Accretion of redeemable convertible preferred stock	(4,470)	(3,204)
Net loss attributable to common stockholders	$ (64,071)	$ (30,183)
Basic and diluted net loss per share	$ (6.20)	$ (14.59)
Weighted-average shares used to compute basic and diluted net loss per share	10,332,593	2,068,334
Comprehensive loss:
Net loss	$ (59,601)	$ (26,979)
Unrealized loss on marketable securities, net of income taxes	(134)
Foreign currency translation adjustments, net of income taxes	(1)
Total comprehensive loss	$ (59,736)	$ (26,979)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Dissenting stockholder [Member]	Bridge Loan [Member]	Series B Redeemable Convertible Preferred Stock [Member]	Series A Redeemable Convertible Preferred Stock [Member]	Conversion of Convertible Note Payable [Member]	Common Stock [Member]	Common Stock [Member]Dissenting stockholder [Member]	Common Stock [Member]Bridge Loan [Member]	Common Stock [Member]Series B Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]Series A Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]Conversion of Convertible Note Payable [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Dissenting stockholder [Member]	Additional Paid-in Capital [Member]Bridge Loan [Member]	Additional Paid-in Capital [Member]Series B Redeemable Convertible Preferred Stock [Member]	Additional Paid-in Capital [Member]Series A Redeemable Convertible Preferred Stock [Member]	Additional Paid-in Capital [Member]Conversion of Convertible Note Payable [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance at Dec. 31, 2015	$ (19,578)						$ 2						$ (4,527)						$ (15,053)
Beginning balance, shares at Dec. 31, 2015							1,301,249
Issuance of common stock	159												159
Issuance of common stock, shares							106,420
Exercise of options	77												77
Exercise of options, shares							51,504
Issuance of warrants	458												458
Beneficial conversion feature	1,812												1,812
Stock-based compensation expense	1,730						$ 2						1,728
Stock-based compensation expense, shares							961,835
Restricted stock issued	0						$ 0						0						0	$ 0
Restricted stock issued, shares							199,795
Accretion of redeemable convertible preferred stock	(3,204)																		(3,204)
Net loss	(26,979)																		(26,979)
Ending balance at Dec. 31, 2016	(45,525)						$ 4						(293)						(45,236)
Ending balance, shares at Dec. 31, 2016							2,620,803
Exercise of Primary Warrant	29,263						$ 2						29,261
Conversion of debt and accrued interest			$ 8,045			$ 20,737						$ 1			$ 8,045			$ 20,736
Exercise of Primary Warrant, shares							2,150,335
Conversion of debt and accrued interest, shares			590,717						590,717			1,523,746
Issuance of restricted stock, net of forfeitures	(33)												(33)
Issuance of restricted stock, net of forfeitures, shares							22,963
Issuance of common stock		$ 56,342	$ 3,666					$ 4						$ 56,338	$ 3,666
Buy-back/Repurchase of common stock	$ (56)												(56)
Issuance of common stock, shares	13,538,080							3,621,250	300,000
Buy-back/Repurchase of common stock, shares	(7,500)						(7,500)
Conversion of preferred stock				$ 18,668	$ 8,598					$ 2	$ 3					$ 18,666	$ 8,595
Conversion of preferred stock, shares				2,309,135	2,922,798					2,309,135	2,922,798
Exercise of options	$ 131												131
Exercise of options, shares							80,829
Issuance of warrants	8,658												8,658
Beneficial conversion feature	554												554
Modification of warrants	371												371
Stock-based compensation expense	16,089												16,089
Stock-based compensation expense, shares							23,807
Accretion of redeemable convertible preferred stock	(4,470)																		(4,470)
Net loss	(59,601)																		(59,601)
Other comprehensive loss	(135)																			(135)
Ending balance at Dec. 31, 2017	$ 61,302						$ 16						$ 170,728						$ (109,307)	$ (135)
Ending balance, shares at Dec. 31, 2017							16,158,883

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net loss	$ (59,601)	$ (26,979)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	253	151
Intangible asset impairment charges		500
Amortization of debt discounts and issuance costs	3,740	3,604
Costs of warrants issued at IPO	5,790
Write-off of debt discounts and issuance costs at IPO	10,132
Change in fair value of warrant liability	(7,114)	(950)
Stock issued to dissenting shareholder		159
Stock-based compensation expense	16,089	1,730
Provision for doubtful accounts	107
Changes in assets and liabilities:
Accounts receivable	(2,964)	1,257
Expenditures billable to clients	(779)	(2,164)
Prepaid expenses and other current assets	(1,620)	(305)
Accounts payable	1,017	(9,188)
Accounts media payments	(778)	6,721
Client advances	1,636	(3,005)
Other accrued liabilities	2,181	1,714
Net cash used in operating activities	(31,911)	(26,755)
Cash flows from investing activities:
Purchases of marketable securities	(39,850)
Capital expenditures	(664)	(37)
Intangibles assets acquired	(3,034)
Deposits for operating leases	(779)
Other		(100)
Net cash used in investing activities	(44,327)	(137)
Cash flows from financing activities:
Net proceeds from common stock offerings	56,468
Proceeds from exercise of Primary Warrant	29,263
Proceeds from the exercise of stock options	131	77
Deferred common stock offering costs		(136)
Debt issuance costs	(68)	(168)
Other	(89)
Net cash provided by financing activities	93,705	19,773
Increase (decrease) in cash and cash equivalents	17,467	(7,119)
Cash and cash equivalents, beginning of year	12,078	19,197
Cash and cash equivalents, end of year	29,545	12,078
Cash paid during the periods for:
Income taxes	6	13
Non-cash investing and financing activities:
Conversion of convertible notes payable, including accrued interest, to common stock	28,782
Conversion of redeemable convertible preferred stock to common stock	27,266
Unpaid deferred common stock offering costs	126	316
Bridge Loan [Member]
Cash flows from financing activities:
Proceeds from debt	8,000
Convertible Notes Payable [Member]
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Amortization of debt discounts and issuance costs	$ 3,740	3,603
Cash flows from financing activities:
Proceeds from debt		$ 20,000

Description of Business

Description of Business	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Description of Business	NOTE 1. 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™, a proprietary AI operating system that unlocks the power of cognitive computing to transform audio, video and other unstructured data and analyze it in conjunction with structured data in a seamless, orchestrated and automated manner to generate actionable intelligence. The Company’s aiWARE platform (“AI platform”) integrates and orchestrates an open ecosystem of 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. Veritone was incorporated as Veritone Delaware, Inc. on June 13, 2014 and changed its name to Veritone, Inc. on July 15, 2014. In July 2014, Veritone merged with ROIM Acquisition Corp. (“RAC”), which owned all of the capital stock of ROIM, Inc. (“ROIM”). Veritone was the surviving corporation in the RAC merger and ROIM became a wholly-owned subsidiary of Veritone following that merger. At that time, Chad Steelberg and Ryan Steelberg, who are brothers, were the majority stockholders of Veritone, RAC and ROIM via direct or indirect ownership interests. Also, in July 2014, Veritone acquired all of the outstanding membership interests in NextMedium, LLC (“NM”). Chad Steelberg and Ryan Steelberg indirectly owned the majority of the membership interests in NM. The Company accounted for these transactions as mergers under common control based upon the guidance in ASC 805-50, Common Stock Offerings Initial Public Offering On May 17, 2017, the Company completed an initial public offering (“IPO”) of its common stock. In connection with the IPO, the Company sold 2,500,000 shares of its common stock at $15 per share for aggregate net proceeds of $32,580, after deducting underwriting discounts, commissions and offering costs of $4,920. Concurrent with the closing of the IPO, the following transactions were completed in accordance with the related agreements (see Notes 6 and 8 for additional information): (a) The Series B Preferred Stock, which had a liquidation preference of $18,668 and a net book value of $18,463, was automatically converted into 2,309,135 shares of the Company’s common stock; (b) The Series A Preferred Stock, which had a liquidation preference of $8,598 and a net book value of $6,272, was automatically converted into 2,922,798 shares of the Company’s common stock; (c) The Secured Convertible Promissory Note (the “Acacia Note”) payable to Acacia Research Corporation (“Acacia”), which had a principal balance of $20,000 and accrued interest of $737, was automatically converted into 1,523,746 shares of the Company’s common stock; (d) The five-year warrant issued to Acacia in conjunction with the Acacia Note (the “Primary Warrant”) was automatically exercised by Acacia, which resulted in the issuance of 2,150,335 shares of the Company’s common stock to Acacia in exchange for cash proceeds of $29,263, and upon exercise of the Primary Warrant, the Company issued to Acacia a five-year warrant to purchase 809,400 shares of the Company’s common stock (the “10% Warrant”); (e) Pursuant to the Note Purchase Agreement with Acacia and Veritone LOC I, LLC (“VLOC”) (collectively, the “Bridge Loan Lenders”), which provided for a line of credit of up to $8,000 (the “Bridge Loan”), the Bridge Loan Lenders funded the remaining undrawn amounts under the Bridge Loan, which provided cash proceeds of $4,000 to the Company. In connection with this funding, the Company issued to the Bridge Loan Lenders (a) an aggregate of 90,000 shares of its common stock, and (b) fully vested warrants to purchase 120,000 shares of common stock; (f) The Bridge Loan, which had a principal balance of $8,000 and accrued interest of $45, was then automatically converted into an aggregate of 590,717 shares of the Company’s common stock; and (g) The warrants to purchase an aggregate of 240,000 shares of the Company’s common stock that were issued in connection with the Bridge Loan were automatically adjusted upon completion of the IPO to be exercisable to purchase an aggregate of 313,440 shares of the Company’s common stock (which was equal to 1.5% of the fully diluted shares of common stock outstanding immediately following the closing of the IPO). Follow-on On November 21, 2017, the Company completed a follow-on

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Preparation The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The consolidated financial statements include the accounts of Veritone and all of its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated. The consolidated financial statements and accompanying notes are the representations of the Company’s management, who is responsible for their integrity and objectivity. In the opinion of the Company’s management, the consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. The preparation of these consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. Fair Value of Financial Instruments Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy, which is based on three levels of inputs, the first two of which are considered observable and the last unobservable, that may be used to measure fair value, is as follows: • Level 1—Quoted prices in active markets for identical assets or liabilities. • Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The Company’s financial instruments, other than its marketable securities and stock warrants, consist primarily of cash and cash equivalents (including money market funds), accounts receivable, accounts payable and convertible notes payable. The Company has determined that the carrying values of these instruments for the periods presented approximate fair value due to their short-term nature and the relatively stable current interest rate environment. Revenue Recognition Media Agency The Company’s media agency places advertisements for clients, primarily with radio broadcasters, podcasters and digital media producers. The Company negotiates its commission rates with its clients. Under the most common billing arrangements, the Company bills clients for the gross costs of the advertisement, which is set by the broadcaster, less any discounts based on negotiated commission rates. The Company remits to the broadcaster the gross amount less the standard commission deducted by the broadcaster. The commission amount negotiated with the client is recorded by the Company as media agency revenue. Media agency revenue is recognized when the advertisement is aired by the broadcaster in accordance with the client arrangement. Expenditures billable to clients are comprised primarily of production and media costs that have been incurred, and the associated fees that have been earned by the Company, but that have not yet been billed to clients. The Company’s clients are often required to make a deposit or pre-pay AI Platform The Company derives its AI platform revenues from a variety of arrangements: SaaS Agreements software-as-a-service Separate Processing Fees: Software Licenses In each of these arrangements, the Company recognizes revenue only when it has evidence that an arrangement exists, delivery has occurred, the fee is fixed or determinable, and collection is reasonably assured. The Company’s customer contracts do not contain general rights of return. However, credits may be issued to customers on a case-by-case In cases in which the Company’s SaaS offerings, software licenses and/or cognitive processing services are sold through independent third parties, such as resellers and distributors, any discounts below standard prices that are provided to such third parties are reflected as reductions in net revenue. Cash Equivalents and Marketable Securities All highly liquid investments with maturities of three months or less at the date of purchase are classified as cash equivalents. The Company’s marketable securities have been classified and accounted for as available-for-sale Accounts Receivable and Expenditures Billable to Clients Accounts receivable consist primarily of amounts due from customers under normal trade terms. Allowances for uncollectible accounts are recorded based upon a number of factors that are reviewed by the Company on an ongoing basis, including historical amounts that have been written off, an evaluation of current economic conditions, and an assessment of customer creditworthiness. A considerable amount of judgment is required in assessing the ultimate realization of accounts receivable. The amounts due from clients based on costs incurred or fees earned that have not yet been billed to clients are reflected as expenditures billable to clients in the accompanying consolidated balance sheets. Property, Equipment and Improvements Property, equipment and improvements are stated at cost. Repairs and maintenance to these assets are charged to expense as incurred. Major improvements enhancing the function and/or useful life of the related assets are capitalized. Depreciation and amortization are computed using the straight-line method over the estimated useful lives (or lease term, if shorter) of the related assets. At the time of retirement or disposition of these assets, the cost and accumulated depreciation or amortization are removed from the accounts and any related gains or losses are recorded to earnings. The useful lives of property, equipment and improvements are as follows: • Property and equipment — 3 years • Leasehold improvements — 5 years or the remaining lease term, whichever is shorter The Company assesses the recoverability of property, equipment and improvements whenever events or changes in circumstances indicate that their carrying value may not be recoverable. There was no impairment of property, equipment and improvements for the periods presented. Impairment of Long-Lived Assets The Company reviews long-lived assets to be held and used, other than goodwill, for impairment at least annually, or whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If an evaluation of recoverability is required, the estimated undiscounted future cash flows directly associated with the asset are compared to the asset’s carrying amount. If the estimated future cash flows from the use of the asset are less than the carrying value, an impairment write-down would be recorded to reduce the asset to its estimated fair value. In March 2016, the Company stopped pursuing a pending patent application for technology it acquired in 2014, and as a result, it recorded a charge of $500 in general and administrative expenses in its consolidated statement of operations and comprehensive loss for 2016 to fully impair such acquired patent. No impairment charges were recorded for the year ended December 31, 2017. Asset Acquisitions The Company follows the guidance in ASC 805, Business Combinations Stock-Based Compensation The Company accounts for stock-based compensation in accordance with ASC 718, Compensation – Stock Compensation Determining the appropriate fair value of stock options at the grant date requires significant judgment, including estimating the volatility of the Company’s common stock and expected term of the awards. The Company estimates volatility based on the historical volatility of the shares of publicly-traded peers of the Company over the expected term, until sufficient information regarding the volatility of the Company’s shares of common stock becomes available. The expected term represents the period of time that stock options are expected to be outstanding and is determined using the simplified method. The simplified method defines the expected term as the average of the contractual term of the options and the vesting period for all tranches. The risk-free rate is based on the implied yield of U.S. Treasury notes as of the grant date with a remaining term approximately equal to the expected term of the award. Certain stock-based awards granted by the Company vest based upon the achievement of performance conditions established by the Compensation Committee of the Company’s Board of Directors. Until the Company has determined that the performance conditions have been met, the amount of expense that the Company records related to performance-based awards is estimated based on the likelihood of achieving the performance conditions. Estimated forfeitures are also taken into account in determining the amount of expense recorded by the Company. The fair value of stock-based awards, adjusted for estimated forfeitures (and adjusted for estimated or actual achievement of performance conditions in the case of awards having performance-based vesting conditions), is amortized using the straight-line attribution method over the requisite service period of the award, which is generally the vesting period. Tax benefits related to stock-based compensation are recognized as a reduction to deferred taxes until the related tax deductions reduce current income taxes. When such event occurs, the tax benefits are then recognized through additional paid in capital. The Company allocates the tax benefits based on the provisions in the tax laws that identify the sequence in which the amounts are utilized for tax purposes (see Note 11). Advertising and Marketing Costs Advertising and marketing costs are expensed as incurred and are primarily included in sales and marketing expenses in the Company’s consolidated statements of operations and comprehensive loss. Advertising and marketing costs include online and print advertising, public relations, tradeshows, and sponsorships. For the years ended December 31, 2017 and 2016, the Company recorded expense of $1,252 and $762, respectively, for advertising and marketing costs. Research and Development Costs and Software Development Costs Research and development costs are expensed as incurred. Costs related to the development of computer software to be sold, leased, or otherwise marketed are subject to capitalization beginning when a product’s technological feasibility has been established and ending when a product is available for general release to customers. In most instances, the Company’s products are released soon after technological feasibility has been established and, as a result, software development costs are expensed as incurred. No software development costs were capitalized in 2017 or 2016. Income Taxes The Company accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are established for temporary differences between the financial statement carrying amounts and the tax bases of the Company’s assets and liabilities using statutory tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered. The Company assesses the likelihood that the deferred tax assets will be recovered from future taxable income and, if recovery is not more likely than not, the Company establishes a valuation allowance to reduce the deferred tax assets to the amounts expected to be realized. Realization of the deferred tax assets is dependent on the Company generating sufficient taxable income in future years to obtain a benefit from the reversal of temporary differences and from net operating losses. The Company utilizes a two-step Debt Issuance Costs The Company deferred and amortized fees paid in connection with the issuance of its convertible notes payable. These fees were amortized using a method that approximates the effective interest method over the term of the related financing. The unamortized debt issuance costs were netted against the principal amounts of the convertible notes payable. Discounts for Debt and Redeemable Convertible Preferred Stock The Company amortized debt discounts over the term of the debt using a method that approximates the effective interest method. The Company amortized discounts on its redeemable convertible preferred stock from the issuance date to the earliest redemption date using a method that approximates the effective interest method. Concentration of Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities and accounts receivable. The Company places its cash and cash equivalents with what management believes are quality financial institutions in the United States and performs periodic evaluations of the relative credit standing of these financial institutions in order to limit the amount of credit exposure with any one institution. At times, the value of the United States deposits exceeds federally insured limits. The Company has not experienced any losses in such accounts. The majority of the Company’s marketable securities are managed by an investment management firm, under the oversight of the Company’s senior financial management team. The portfolio manager invests the funds in accordance with the Company’s investment policy, which, among other things, limits the amounts that may be invested with one issuer. Such policy is reviewed regularly by the Company’s senior financial management team and the Audit Committee of the Company’s Board of Directors. Two customers accounted for approximately 24% and 30% of the Company’s net revenues for the years ended December 31, 2017 and 2016, respectively. These same customers accounted for $668 and $939 of the Company’s accounts receivable balance as of December 31, 2017 and 2016, respectively, which accounts receivable included production and media costs and the Company’s related commissions. Earnings Per Share Basic and diluted net loss per common share is presented in conformity with the two-class as-converted Under the two-class if-converted The following table presents the computation of basic and diluted net loss per common share: Year Ended 2017 2016 Numerator: Net loss $ (59,601 ) $ (26,979 ) Accretion of redeemable convertible preferred stock (4,470 ) (3,204 ) Net loss attributable to common stockholders $ (64,071 ) $ (30,183 ) Denominator: Weighted-average common shares outstanding 10,515,411 2,205,577 Less: Weighted-average shares subject to repurchase (182,818 ) (137,243 ) Denominator for basic and diluted net loss per share attributable to common stockholders 10,332,593 2,068,334 Basic and diluted net loss per share attributable to common stockholders $ (6.20 ) $ (14.59 ) The Company reported net losses attributable to common stockholders for all periods presented and, as such, all potentially dilutive shares of common stock would have been antidilutive for such periods. The table below presents the weighted-average securities (in common equivalent shares) outstanding during the periods presented that have been excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would be anti-dilutive: Year Ended 2017 2016 Common stock options and restricted stock units 3,148,931 680,437 Warrants to purchase common stock 1,120,053 2,493,449 Shares issuable upon conversion of the convertible note payable — 1,490,651 Redeemable convertible preferred stock — 5,083,932 Total 4,268,984 9,748,469 Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 March 2016, the FASB issued ASU No. 2016-09, 2016-09)”. In August 2016, the FASB issued ASU 2016-15, In May 2017, the FASB issued ASU No. 2017-09,

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2017
Investments, All Other Investments [Abstract]
Financial Instruments	NOTE 3. FINANCIAL INSTRUMENTS Cash, 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, cash equivalents and marketable securities as of December 31, 2017: Cost Gross Fair Cash and Marketable 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 papers 4,959 (5 ) 4,954 — 4,954 Corporate debt securities 30,268 (112 ) 30,156 — 30,156 Subtotal 39,732 (134 ) 39,598 — 39,598 Total $ 69,277 $ (134 ) $ 69,143 $ 29,545 $ 39,598 As of December 31, 2016, the Company had a cash and cash equivalents balance of $12,078, which comprised of $9,922 in cash and $2,156 in money market funds (Level 1). As of December 31, 2017, the respective maturities of the Company’s marketable securities were as follows: Cost Fair Value Due in one year or less $ 26,004 $ 25,950 Due after one year through five years 13,728 13,648 Total $ 39,732 $ 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 December 31, 2017, 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 were used, and the value of the Company’s stock warrants would decrease if a lower risk free interest rate were 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. The following table summarizes quantitative information with respect to the significant unobservable inputs used for the Company’s Primary Warrant that is categorized within the Level 3 fair value hierarchy: December 31, 2016 Volatility 80 % Risk free rate 1.84 % Discount for lack of marketability 20 % The following table represents a reconciliation of the Level 3 measurement of the Company’s Primary Warrant: Balance, December 31, 2016 $ 7,114 Change in fair value of warrant liability (7,114 ) Balance, December 31, 2017 $ — The following table summarizes quantitative information with respect to the significant unobservable inputs used for the Company’s Acacia Note Warrants that are categorized within the Level 3 fair value hierarchy as of December 31, 2016: First Tranche Second Tranche Volatility 80 % 80 % Risk free rate 1.61 % 1.68 % Discount for lack of marketability 20 % 20 % The total fair value of the Acacia Note Warrants in 2016 under Level 3 measurement was $507. In March 2017, in connection with the amendment of the Acacia Primary Warrant, each of these warrants was amended to provide that the exercise prices thereof shall be equal to the lower of $13.6088 or the IPO price per share. As a result, the following quantitative information was used to determine the fair value of the Company’s Acacia Note Warrants as of March 31, 2017: First Tranche Second Tranche Volatility 65 % 65 % Risk free rate 1.58 % 1.64 % Discount for lack of marketability 10 % 10 % The total fair value of the Acacia Note warrants under Level 3 measurement increased by $334 to $841. In connection with the funding of the Bridge Loan, in March 2017, April 2017 and May 2017, the Company issued to the Bridge Loan Lenders warrants to purchase shares of common stock. Such warrants were automatically adjusted upon completion of the IPO. The following table summarizes quantitative information with respect to the significant unobservable inputs used for the Company’s Bridge Loan Warrants which were issued to the Bridge Loan Lenders in March 2017, April 2017 and May 2017 that are categorized within the Level 3 fair value hierarchy: Volatility 70% Risk free rate 2.40% Discount for lack of marketability 10% The fair value of the Bridge Loan Warrants under Level 3 measurement was $6,534. In May 2017, upon exercise of the Primary Warrant, the Company issued the 10% Warrant to Acacia. The following table summarizes quantitative information with respect to the significant unobservable inputs used for the Company’s 10% Warrant that is also categorized as Level 3 within the fair value hierarchy: May 17, 2017 Volatility 70 % Risk free rate 1.44 % Discount for lack of marketability 0 % The fair value of the 10% Warrant under Level 3 measurement was $5,790.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	NOTE 4. INTANGIBLE ASSETS In December 2017, the Company acquired the advanced data analytics software and related intellectual property assets of Atigeo Corporation for total consideration of $3,004. This acquisition adds proprietary machine learning capabilities to the Company’s growing body of technology and intellectual property in data science and will help the Company further refine its conducted learning. The Company also acquired a domain name for consideration of $30 in 2017. These definite-lived assets will be amortized over a period of three years. During 2017, the Company recorded amortization expense of $8 related to these definite-lived assets. The following table summarizes the future estimated annual amortization expense for these assets over the next three years: Years Ending December 31, Minimum 2018 $ 1,011 2019 1,011 2020 1,004 Total $ 3,026

Consolidated Financial Statemen

Consolidated Financial Statements Details	12 Months Ended
	Dec. 31, 2017
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 consisted of the following: As of 2017 2016 Property and equipment $ 378 $ 164 Leasehold improvements 27 12 Construction in progress 435 — 840 176 Less: accumulated depreciation (160 ) (108 ) Property, equipment and improvements, net $ 680 $ 68 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 is expected to be completed in the first half of 2018. Depreciation expense was $52 and $32 for the years ended December 31, 2017 and 2016, respectively. Capitalized Software, Net Capitalized software is presented in the Company’s consolidated balance sheets under other assets and consisted of the following: As of 2017 2016 Capitalized software $ 471 $ 471 Less: accumulated depreciation (343 ) (150 ) Capitalized software, net $ 128 $ 321 Amortization expense related to capitalized software was $193 and $119 during the years ended December 31, 2017 and 2016, respectively. The account balance of $128 at December 31, 2017 will be fully amortized in 2018. Other Accrued Liabilities Other accrued liabilities were comprised of the following: As of 2017 2016 Accrued payroll and benefits $ 3,117 $ 500 Other accruals 1,325 2,560 Total $ 4,442 $ 3,060 Consolidated Statements of Operations and Comprehensive Loss Details Net Revenues Net revenues for the periods presented were comprised of the following: Year Ended 2017 2016 Media agency revenues $ 12,949 $ 8,404 AI platform revenues 1,464 507 Total net revenues $ 14,413 $ 8,911 During the years ended December 31, 2017 and 2016, the Company made $113,513 and $75,074 in gross media placements, of which $95,989 and $64,923, respectively, were billed directly to customers. Of the amounts billed directly to customers, $83,040 and $56,519 represented media-related costs netted against billings during the years ended December 31, 2017 and 2016, respectively. Other Expense, Net Other expense, net for the years ended December 31, 2017 and 2016 were comprised of the following: Year Ended 2017 2016 Interest expense $ (4,236 ) $ (3,890 ) Interest income 211 6 Stock warrants issued (5,790 ) — Write-off (10,132 ) — Gain on fair value change of warrant liability 7,114 950 Other — (259 ) Other expense, net $ (12,833 ) $ (3,193 ) Interest expense, net for the years ended December 31, 2017 and 2016 included amortization of deferred debt discounts and issuance costs of $3,740 and $3,603, respectively, related to the Company’s convertible notes payable.

Convertible Notes Payable

Convertible Notes Payable	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Convertible Notes Payable	NOTE 6. CONVERTIBLE NOTES PAYABLE Acacia Note In 2016, the Company borrowed a total of $20,000 under the Acacia Note. The Acacia Note had an interest rate of 6.0% per year, with interest payable at maturity in November 2017, and was secured by substantially all of the Company’s assets. In conjunction with the Acacia Note, the Company issued to Acacia three four-year warrants (the Acacia Note Warrants) to purchase a number of shares of the Company’s common stock that would be determined in the future depending upon a number of factors, including whether the Acacia Note was converted to the Company’s common stock or repaid at maturity. The Company also issued to Acacia the Primary Warrant. Under the Primary Warrant, Acacia could purchase shares of the Company’s common stock if certain events occurred in the future in an amount equal to $50,000 less the balance of the Acacia Note principal and accrued interest. The total fair value of the Acacia Note Warrants was $841 and was treated as a debt discount to the Acacia Note. The fair value of the Primary Warrant was $8,064 and was treated as a warrant liability. At the time of the Company’s IPO, the Acacia Note, which had a principal balance of $20,000 and accrued interest of $737, was automatically converted into 1,523,746 shares of the Company’s common stock at a conversion price per share of $13.6088. As a result of the conversion of the Acacia Note, the Company recorded a charge of $4,347, representing the unamortized balances of the debt discounts and debt issuance costs, which was presented as an expense in other expense, net in the Company’s consolidated statement of operations and comprehensive loss for the year ended December 31, 2017. Bridge Loan In March 2017, the Company entered into a Note Purchase Agreement with the Bridge Loan Lenders, which provided for the Bridge Loan. The convertible promissory notes issued to the Bridge Loan Lenders pursuant to the Bridge Loan accrued interest at the rate of 8% per annum, compounded quarterly. The borrowings were due and payable on November 25, 2017, and the Company’s obligations under this facility were secured by a security interest in substantially all of the assets of the Company, which was of equal priority to the security interests of Acacia under the Acacia Note. The Company drew down the initial $2,000 installment under the Bridge Loan upon the execution of the Note Purchase Agreement. In April 2017, the Company borrowed an additional $2,000 under the Bridge Loan. In May 2017, the Bridge Loan Lenders funded the remaining undrawn amounts of $4,000 under the Bridge Loan, which increased the outstanding principal balance of the Bridge Loan to $8,000. Upon the execution of the Note Purchase Agreement, the Company issued an aggregate of 120,000 shares of the Company’s common stock to the Bridge Loan Lenders in accordance with the agreement. In addition, in connection with the funding of the $8,000 principal amount of the Bridge Loan in March 2017, April 2017 and May 2017, the Company issued to the Bridge Loan Lenders an aggregate of 180,000 shares of the Company’s common stock and warrants to purchase an aggregate of 240,000 shares of common stock. Such warrants were automatically adjusted upon completion of the IPO to be exercisable to purchase an aggregate of 313,440 shares of the Company’s common stock (which was equal to 1.5% of the fully diluted shares of common stock outstanding immediately following the closing of the IPO). The fair value of the common stock and warrants that were issued to the Bridge Loan Lenders in March 2017 and April 2017 totaled $3,664 and was treated as a debt discount to the Bridge Loan. Concurrent with the closing of the IPO on May 17, 2017, the $8,000 principal balance of the Bridge Loan and accumulated accrued interest of $45 were automatically converted into an aggregate of 590,717 shares of the Company’s common stock at a conversion price per share of $13.6088. As a result of the conversion of the Bridge Loan, the Company recorded a charge of $2,915, representing the unamortized balance of the debt discounts and debt issuance costs, which was presented as an expense in other expense, net in the Company’s consolidated statement of operations and comprehensive loss for the year ended December 31, 2017. In addition, upon the issuance of the additional common stock and warrants to the Bridge Loan Lenders upon the funding of the remaining undrawn amounts of $4,000 under the Bridge Loan in connection with the IPO, the Company recorded charges of $1,100 and $1,770, related to such common stock and warrants, respectively. Such amounts were presented as an expense in other expense in the Company’s consolidated statement of operations and comprehensive loss for the year ended December 31, 2017 with a corresponding credit to additional paid-in The following table represents a reconciliation of the principal amounts of the Acacia Note to the convertible note payable presented in the Company’s consolidated balance sheet as of December 31, 2016 (no balances were outstanding under the Acacia Note or Bridge Loan as of December 31, 2017): First Loan principal, August 15, 2016 $ 10,000 Second Loan principal, November 25, 2016 10,000 Debt discounts associated with stock warrants, net (6,793 ) Debt issuance costs, net (105 ) Accrued interest 286 Convertible note payable $ 13,388

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 7. COMMITMENTS AND CONTINGENCIES Gain on Settlement of Insurance Claim In December 2017, the Company entered into a settlement agreement and mutual release with the Company’s professional employer organization (“PEO”) and the PEO’s employment practices liability insurer related to the Company’s claim for reimbursement of legal fees that it had incurred in defending a lawsuit brought by a former employee. In the agreement, the insurer agreed to pay $400 to the Company in settlement of its claim, with the payment to be made within 14 days after the agreement’s effective date. Under ASC450-30, Gain Contingencies Employment Agreements In March 2017, the Company entered into three-year employment agreements with each of Chad Steelberg, the Company’s Chief Executive Officer, and Ryan Steelberg, the Company’s President. Under the agreement with Chad Steelberg, as of the end of each calendar quarter during the term of the agreement (following March 31, 2017) during which Chad Steelberg is still employed by the Company, the Company will issue to Mr. Steelberg a number of shares of its common stock calculated by dividing $125 by the fair market value (as defined in the agreement) of the Company’s common stock. During the year ended December 31, 2017, Chad Steelberg received 17,807 shares of common stock pursuant to this agreement. The agreement with Ryan Steelberg provides that he shall receive an annual salary of $350. Leases On July 24, 2017, the Company entered into a Lease Agreement covering 38,875 square feet of office space for its corporate headquarters, with a term that commenced on March 1, 2018 and will continue through December 2024. The effective base rental payments under this lease are approximately $114 per month, and the Company also pays certain operating expenses relating to the space. Subject to meeting certain conditions, the Company has two options to extend the term for additional periods of five years each, and has certain rights to lease other available space in the building. In addition to its principal executive offices, the Company leases 7,965 square feet in San Diego, California pursuant to a lease that expires in August 2022. The total payments under this lease is approximately $21 per month. As of December 31, 2017, future minimum lease payments were as follows: Year Ending December 31, Minimum 2018 $ 416 2019 1,510 2020 1,819 2021 1,875 2022 1,833 Thereafter 3,137 Total $ 10,590 Rent expense totaled $866 and $588 for the years ended December 31, 2017 and 2016, respectively. Other Contingencies From time to time, the Company may be involved in litigation relating to claims arising out of its operations in the normal course of business. The Company currently is not a party to any legal proceedings, the adverse outcome of which, in management’s opinion, individually or in the aggregate, would have a material adverse effect on the Company’s results of operations, financial position or cash flows.

Redeemable Convertible Preferre

Redeemable Convertible Preferred Stock	12 Months Ended
	Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Redeemable Convertible Preferred Stock	NOTE 8. REDEEMABLE CONVERTIBLE PREFERRED STOCK In connection with the RAC and NM transactions, the Company issued 2,666,667 and 3,000,000 shares of Series A-1 A-1 one-for-one The Series B preferred stock was recorded at the amount of the cash received at the date the shares were issued, with an offset for stock issuance costs. Stock issuance costs are amortized using a method that approximates the effective interest method over the term of the related financing. In the Company’s consolidated financial statements, the value of the Series B Preferred Stock was accounted for as temporary equity and was increased each period by the liquidation preference and by the amortization of the stock issuance costs over a five-year life, at which point the Series B preferred stock holders have the right of redemption. The liquidation preference and the amortization of stock issuance costs were reflected as accretion of redeemable convertible preferred stock in the consolidated statements of operations and comprehensive loss and were accounted for as an increase to net loss attributable to common shareholders. The Series A preferred stock, along with shares of the Company’s common stock, were issued to the holders of NM’s membership interests in exchange for such interests. NM was under common control with the Company, and NM’s assets had a net book value of $1,500. Following the guidance of ASC 805-50, Each share of the redeemable convertible preferred stock had a liquidation preference equal to the applicable original issue price of each series, plus an eight percent compounded annual return, subject to adjustment for stock dividends, splits, combinations, recapitalizations and the like with respect to such shares. The preferred stock was redeemable at any time after July 15, 2019 if the holders of the minimum number of outstanding shares made that election. As of December 31, 2016, the holders of Series B preferred stock had a liquidation preference over the holders of Series A preferred stock and common stock by approximately $5.86 per share. As of December 31, 2016, the holders of Series A preferred stock had a liquidation preference over the holders of common stock by approximately $2.14 per share. The redeemable convertible preferred stock was convertible into the Company’s common stock at the option of the holders. Also, the redeemable convertible preferred stock would automatically convert into the Company’s common stock upon a public offering with gross proceeds of at least $15,000. In the conversion to common stock, the holders of the redeemable convertible preferred stock would receive one share of the Company’s common stock for each share of redeemable convertible preferred stock multiplied by the share’s liquidation preference divided by its original issue price. Concurrent with the closing of the IPO, the Series B preferred stock, which had a liquidation preference of $18,668 and a net book value of $18,463, was automatically converted into 2,309,135 shares of the Company’s common stock, and the Series A preferred stock, which had a liquidation preference of $8,598 and a net book value of $6,272, was automatically converted into 2,922,798 shares of the Company’s common stock. The differences between the liquidation preference and book value of the Series B and Series A preferred stock of $205 and $2,326, respectively, were recorded as accretion of redeemable convertible preferred stock in the Company’s statement of operations and comprehensive loss for the year ended December 31, 2017 and an increase to additional paid-in For the year ended December 31, 2017, the Company recorded the amount of the beneficial conversion feature of the Series B and Series A preferred stock amounting to $226 and $328, respectively, as the respective conversion prices for such shares were less than the fair market value of the underlying preferred stock. The beneficial conversion feature resulted in the recording of a discount against the preferred stock and a corresponding credit to the Company’s additional paid-in write-off In May 2017, the Board of Directors and the stockholders of the Company approved the decrease in the Company’s authorized preferred stock from 11,500,000 shares to 1,000,000 shares (par value $0.001 per share), effective following the closing of the IPO and the filing of the Company’s amended and restated certificate of incorporation.

Stockholders' Equity (Deficit)

Stockholders' Equity (Deficit)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Stockholders' Equity (Deficit)	NOTE 9. STOCKHOLDERS’ EQUITY (DEFICIT) Reverse Split In April 2017, the Company’s Board of Directors and stockholders approved a 0.6-for-1.0 Increase in Authorized Shares of Common Stock In May 2017, the Company’s Board of Directors and stockholders approved the increase in the Company’s authorized common stock to 75,000,000 shares from 38,500,000 shares (par value of $0.001 per share), effective following the closing of the IPO and the filing of the Company’s amended and restated certificate of incorporation. Issuances of Common Stock During 2017, the Company issued a total of 13,538,080 shares of common stock, net of 22,243 shares of restricted stock forfeited by employees due to termination of employment, 1,227 shares of common stock withheld in payment of taxes due by employees upon vesting of restricted stock, and 7,500 shares of common stock repurchased by the Company, as follows: (a) 120,000 shares to the Bridge Loan Lenders upon execution of the Note Purchase Agreement in March 2017, (b) 90,000 shares in connection with the $2,000 Bridge Loan borrowings in March 2017 and April 2017, (c) 2,500,000 shares for the IPO, (d) 2,309,135 shares for the conversion of the Series B preferred stock upon the IPO, (e) 2,922,798 shares for the conversion of the Series A preferred stock upon the IPO, (f) 2,150,335 shares for the exercise of the Primary Warrant upon the IPO, (g) 1,523,746 shares for the conversion of the Acacia Note and accrued interest upon the IPO, (h) 590,717 shares for the conversion of the Bridge Loan and accrued interest upon the IPO, (i) 90,000 shares in connection with the $4,000 Bridge Loan borrowing in May 2017, (j) 1,121,250 shares for the follow-on (k) 6,000 shares of common stock issued to a consultant for services rendered, and (l) 145,069 shares issued under the Company’s Stock Plans. Dispute Settlement On December 23, 2016, the Company entered into a settlement agreement and release relating to certain claims by a former employee, pursuant to which the Company paid to the former employee a lump sum cash payment of $350 on January 4, 2017, which included a payment to the former employee to repurchase 7,500 shares of the Company’s common stock in the amount of $56, representing the fair value of such stock at that time. In connection with the settlement, in 2016, the Company recorded $294 in general and administrative expense. In addition, pursuant to the agreement, Chad Steelberg, the Company’s Chairman of the Board and Chief Executive Officer, purchased all of the former employee’s membership interests in BV16, LLC, a minority stockholder in the Company. Share Issuance to Existing Stockholders In April 2016, the Company issued 961,835 shares of the Company’s common stock valued at $1.50 per share to an entity beneficially owned by the Company’s Chief Executive Officer and President, who are also directors and indirect stockholders of the Company (the “Founders”). The shares were issued to the Founders in consideration for services rendered to the Company in the first four months of 2016, and the Company recorded stock-based compensation expense of $1,443 in the year ended December 31, 2016. In April 2016, the Company entered into an agreement with a stockholder who initially dissented to the issuance of shares to the Company’s Founders. Pursuant to the agreement, the Company agreed to issue to such stockholder an aggregate of 106,420 shares of the Company’s common stock and paid to such stockholder an amount equal to an aggregate of $287, representing (i) the estimated taxes for the shares to be issued to such stockholder and (ii) the reimbursement of certain legal fees. In addition, the Company has agreed to indemnify such stockholder for any losses, damages and costs associated with certain matters related to the bankruptcy of the Company that owned ROIM, and for any additional taxes that may be incurred by such stockholder in connection with the issuance to such stockholder of the foregoing 106,420 shares of common stock. In connection with the issuance of these shares, the Company recorded an expense of $159, which was included in general and administrative expense for the year ended December 31, 2016. Common Stock Warrants During 2017, the Company issued warrants to purchase 1,122,840 shares of common stock, as listed below: Description Vesting terms Life in years Exercise Price Number of 10% Warrant 50% on issuance; 50% in May 2018 5 $ 13.6088 809,400 Bridge Loan Warrants Fully vested on issuance 10 $ 13.6088 313,440 During 2016, the Company issued warrants to purchase 2,552,068 shares of common stock, as listed below: Description Vesting terms Life in years Exercise Price Number of Acacia Note Warrants Fully vested on issuance 4 $ 13.6088 154,311 Acacia Primary Warrant Fully vested on issuance 5 $ 13.6088 2,150,335 Westwood One Upon achievement of performance condition 10 $ 8.0833 247,422 The Acacia Primary Warrant was exercised in connection with the Company’s IPO. The warrant issued to Westwood One will vest upon the achievement of a performance condition related to sales of licenses to the Company’s AI platform. As of December 31, 2017 and 2016, achievement of such performance condition was not deemed probable and, therefore, no expense related to this warrant has been recorded in the Company’s consolidated statements of operations and comprehensive loss for the years ended December 31, 2017 and 2016. As of December 31, 2017, the Company had a total of 1,524,573 warrants issued and outstanding.

Stock Plans

Stock Plans	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Plans	NOTE 10. STOCK PLANS Stock Incentive Plans In 2014, the Company’s Board of Directors and stockholders approved and adopted the 2014 Stock Option/Stock Issuance Plan (the “2014 Plan”), which was amended in March 2015, October 2016 and April 2017. The Plan provides that awards granted may be options, restricted stock or restricted stock units. Stock option awards may be either incentive stock options or non-qualified In April 2017, the Company’s Board of Directors and stockholders approved and adopted the 2017 Stock Incentive Plan (the “2017 Plan”), which became effective on May 11, 2017. Under the 2017 Plan, employees, non-employee The 2014 Plan and the 2017 Plan are collectively referred to herein as the “Stock Plans.” The Stock Plans are administered by the compensation committee of the Board of Directors, which determines the recipients and the terms of the awards granted. All stock options granted under the Stock Plans have exercise prices equal to or greater than the fair market value of the Company’s common stock on the grant date, and expire ten years after the grant date, subject to earlier expiration in the event of termination of the optionee’s continuous service with the Company. Equity awards that have been granted under the Stock Plans to employees (with the exception the Company’s Chief Executive Officer and President) and consultants generally vest over a period of four years (with certain limited exceptions), subject to the optionee’s continuous service with the Company. The restricted stock units awarded to members of the Company’s Board of Directors under the automatic grant program provisions of the 2017 Plan vest over a period of one year. In May 2017, the Company granted to the Company’s Chief Executive Officer, Chad Steelberg, and President, Ryan Steelberg, pursuant to the terms of their employment agreements, (i) options to purchase an aggregate of 2,089,638 shares of the Company’s common stock, which are subject to time-based vesting conditions, and (ii) options to purchase an aggregate of 1,044,818 shares of the Company’s common stock, which are subject to performance-based vesting conditions. The exercise price of all such stock options is $15 per share, which was the IPO price of the Company’s common stock. The time-based stock options vest in equal monthly increments over three years, subject to each executive’s continuous service with the Company, and subject to acceleration of vesting under certain circumstances as set forth in the option agreements. The performance-based stock options were to vest upon the earlier of the first date on which the market capitalization of the Company’s common stock equaled or exceeded $400,000 over five consecutive business days, or five years after the IPO. In September 2017, the performance-based stock options vested in full, as the performance measure relating to the Company’s market capitalization was achieved. Total stock-based compensation expense of $9,282 was recorded in 2017 for these performance-based stock options. The shares of common stock issuable to Chad Steelberg on a quarterly basis in lieu of salary pursuant to his employment agreement are fully vested upon issuance. Stock-based Compensation The Company recognizes stock-based compensation expense for awards granted under the Stock Plans ratably over the requisite service period, which is generally the vesting period. The Company also recognizes stock-based compensation expense related to the Company’s Employee Stock Purchase Plan (“ESPP”) ratably over each purchase interval. The fair values of stock options and purchase rights under the ESPP are determined as of the grant date using the Black-Scholes option-pricing model. The assumptions used in calculating the fair values of options granted during the years ended December 31, 2017 and 2016 are set forth in the table below: Year Ended December 31, 2017 Year Ended December 31, 2016 Expected terms (in years) 5.83 - 6.31 5.58 - 6.08 Expected volatility 52% -65% 55%% - 60% Risk-free interest rate 1.79% - 2.20% 1.30% - 1.72% Expected dividend yield — — The assumptions used in calculating the fair values of purchase rights granted under the ESPP during the year ended December 31, 2017 are set forth in the table below: Year Ended December 31, 2017 Expected term (in years) 0.50 Expected volatility 53% Risk-free interest rate 1.15% Expected dividend yield — The Company’s stock-based compensation expense for the years ended December 31, 2017 and 2016 totaled $16,089 and $1,730, respectively. The stock-based compensation expense by type of award and by operating expense grouping are presented below: Year Ended 2017 2016 Stock-based compensation expense by type of award: Restricted stock $ 891 $ 151 Common stock awards 375 1,442 Restricted stock units 327 — Stock options 14,391 137 Employee stock purchase plan 105 — Total $ 16,089 $ 1,730 Stock-based compensation expense by operating expense grouping: Sales and marketing $ 438 $ 71 Research and development 464 31 General and administrative 15,187 1,628 Total $ 16,089 $ 1,730 In recognizing stock-based compensation expense related to equity awards under the Company’s Stock Plans for the years ended December 31, 2017 and 2016, the Company applied an estimated forfeiture rate of ten percent (10%) based on historical and estimated future turnover of the Company’s employees. Restricted Stock The Company’s restricted stock activity for the year ended December 31, 2017 was as follows: Shares Weighted Unvested at December 31, 2016 208,886 $ 4.80 Granted 64,240 $ 15.47 Forfeited (22,241) $ 8.42 Vested (103,429) $ 8.50 Unvested at December 31, 2017 147,456 $ 6.30 As of December 31, 2017, total unrecognized compensation cost related to restricted stock was $1,030, which is expected to be recognized over a period of 2.2 years. The weighted average grant date fair value per share of restricted stock granted was $15.47 and $4.71 for the years ended December 31, 2017 and 2016, respectively. The fair values of restricted stock vested during the years ended December 31, 2017 and 2016 totaled $2,185 and $243, respectively. Restricted Stock Units The Company’s restricted stock units activity for the year ended December 31, 2017 was as follows: Shares Weighted Unvested at December 31, 2016 — $ — Granted 35,576 $ 14.76 Forfeited — $ — Vested — $ — Unvested at December 31, 2017 35,576 $ 14.76 As of December 31, 2017, total unrecognized compensation cost related to restricted stock units was $197, which is expected to be recognized over a period of 0.4 year. Stock Options The Company’s stock option activity for the year ended December 31, 2017 was as follows: No. of Weighted Exercise Weighted Aggregate Outstanding at December 31, 2016 680,434 $ 2.27 8.49 $ 3,031 Options Granted 4,383,208 $ 15.27 Options Exercised (80,829 ) $ 1.62 Options Forfeited (161,346 ) $ 9.90 Options Expired (18,873 ) $ 1.50 Outstanding at December 31, 2017 4,802,594 $ 13.89 9.17 $44,712 Exercisable at December 31, 2017 1,805,482 $ 12.44 8.85 $19,433 Vested and expected to vest at December 31, 2017 4,715,202 $ 13.87 9.17 $43,994 The aggregate intrinsic value 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 At December 31, 2017, total unrecognized compensation expense related to stock options was $23,408 and is expected to be recognized over a weighted average period of 2.8 years. Employee Stock Purchase Plan In April 2017, the Company’s Board of Directors and stockholders approved and adopted the ESPP, which became effective on May 11, 2017. The ESPP is administered by the compensation committee of the Board of Directors and is intended to qualify as an employee stock purchase plan under Section 423 of the Code. The purchase price for shares of the Company’s common stock under the ESPP will be established by the plan administrator prior to the start of the offering period, but will not be less than 85% of the lower of the fair market value of the Company’s common stock on (i) the date the eligible employee enters an offering period and (ii) the purchase date. Each purchase right granted to an employee will provide an employee with the right to purchase up to 1,000 shares of common stock on each purchase date within the offering period. However, no employee will have the right to purchase shares of the Company’s common stock in an amount that, when aggregated with the shares subject to purchase rights under all Company employee stock purchase plans that are also in effect in the same calendar year, have a fair market value of more than $25, determined as of the first day of the applicable offering period. The Company has initially reserved 1,000,000 shares of its common stock for issuance under the ESPP. The share reserve will increase automatically on the first trading day of January each calendar year, beginning with calendar year 2018, by an amount equal to 1% of the total number of shares of common stock outstanding on the last trading day in December of the immediately preceding calendar year, up to an annual maximum of 250,000 shares. Accrued employee contributions as of December 31, 2017 amounted to $253. As of December 31, 2017, no shares of common stock had been purchased by the Company’s employees under the ESPP.

Provision for Income Taxes

Provision for Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision for Income Taxes	NOTE 11. PROVISION FOR INCOME TAXES The Tax Cuts and Jobs Act (the “Tax Reform”) was enacted in December 2017. Among other things, the primary provision of the Tax Reform impacting the Company is the reduction to the U.S. corporate income tax rate from 35% to 21%. The change in tax law required the Company to remeasure existing net deferred tax assets using the lower rate in the period of enactment resulting in an income tax expense of approximately $10 million in the year ended December 31, 2017. This expense was fully offset by a corresponding reduction in the Company’s valuation allowance. The Company has reported provisional amounts for the income tax effects of the Tax Reform for which the accounting is incomplete but a reasonable estimate could be determined. There were no amounts accounted for by the Company under the prior tax law for which the specific impact of the Tax Reform could not be reasonably estimated. Based on a continued analysis of the estimates and further guidance on the application of the law, it is anticipated that additional revisions may occur throughout the allowable measurement period. The provision for income taxes consisted of the following for the years ended December 31, 2017 and 2016: Year Ended 2017 2016 Current: Federal $ — $ — State 6 6 Total current 6 6 Deferred: Federal (7,216 ) (6,658 ) State (1,210 ) 42 Total deferred (8,426 ) (6,616 ) Change in valuation allowance 8,426 6,616 Total deferred — — Provision for income taxes $ 6 $ 6 The significant components of the Company’s deferred income tax assets and liabilities as of December 31, 2017 and 2016 were as follows: As of As of Deferred tax assets: Net operating loss carryforwards and credits $ 13,844 $ 11,401 Stock-based compensation 3,416 — Accrued expenses 445 301 Research credits 490 — Other 83 66 18,278 11,768 Deferred tax liabilities: State taxes — — Convertible note payable — (1,823 ) Stock-based compensation — (94 ) — (1,917 ) Valuation allowance (18,278 ) (9,851 ) Total deferred tax liabilities $ — $ — The Company has evaluated the available positive and negative evidence supporting the realization of its gross deferred tax assets, including its cumulative losses, and the amount and timing of future taxable income, and has determined it is more likely than not that the assets will not be realized. Accordingly, the Company recorded a full valuation allowance as of December 31, 2017 and 2016 against its U.S. federal and state deferred tax assets as of December 31, 2017 and 2016. The Company’s valuation allowance increased by $8,426 and $6,616 during the years ended December 31, 2017 and 2016, respectively. As of December 31, 2017, the Company has federal and state net operating loss carryforwards of approximately $62,036 and $61,807, respectively. The U.S. federal and state net operating losses will begin to expire in 2034, unless previously utilized. In addition, the Company has federal and state research and expenditure credit carryforwards approximately $200 and $200, respectively as of December 31, 2017. The federal research and expenditure credit will expire in 2026 if unused and the state research and expenditure credit may be carried forward indefinitely. Certain tax attributes may be subject to an annual limitation in the event there has been or is a change of ownership as defined under Internal Revenue Code Section 382. As of December 31, 2017 and 2016, the Company’s pre-tax paid-in The Company is subject to taxation in the United States and various states. Its U.S. federal tax returns and state returns are open for examination for tax years 2014 and forward. Neither the Company nor any of its subsidiaries are currently under examination from tax authorities in the jurisdictions in which the Company does business. The difference between the income tax expense at the federal statutory rate and the Company’s effective tax rate from the Company’s continuing operations is as follows: December 31, December 31, Federal statutory rate 34.00 % 34.00 % State income tax rate, net of Federal tax benefit 1.28 (0.14 ) Mark to market adjustment on stock warrants 4.06 1.22 Meals and entertainment and other 1.67 1.16 Debt discount amortization (2.42 ) — Loss on stock warrants issued (3.30 ) — Loss on write-off (5.78 ) — Change in valuation allowance (12.61 ) (36.22 ) Rate change due to tax law change (16.89 ) — Effective tax rate 0.01 % 0.02 %

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 12. RELATED PARTY TRANSACTIONS Two members of Acacia’s Board of Directors and one member of Acacia’s executive management are members of the Company’s Board of Directors. As a result, Acacia is a related party and the transactions with Acacia described in Note 6 are related party transactions. Chad Steelberg and Ryan Steelberg, who are executive officers of the Company, collectively own fifty percent of VLOC’s membership interests. VLOC is one of the Bridge Loan Lenders, as described in Note 6. The Bridge Loan transactions described in Note 6 are related party transactions. In March 2017, the Company entered into employment agreements with Chad Steelberg and Ryan Steelberg, who are executive officers of the Company. See Note 7 for a discussion of these employment agreements. As discussed in Note 9, in April 2016, the Company issued 961,835 shares of the Company’s common stock at $1.50 per share to an entity beneficially owned by the Founders of the Company. The shares were issued to such entity in consideration for the services rendered to the Company by the Founders during the first four months of 2016. The Company reimbursed Chad Steelberg and Ryan Steelberg for the costs of their healthcare plans. During the years ended December 31, 2017 and 2016, the Company expensed $58 and $73 for the cost of such plans, respectively. As of December 31, 2017 and 2016, the Company has an accrual of $0 and $73, respectively, related to these healthcare plans. In October 2014, the Company and Steel Ventures, LLC (“SVL”), an affiliated company whose beneficial owners have significant control over the Company, entered into an Intercompany Administrative Services Agreement (the “Service Agreement”) effective October 1, 2014 for a two-year two-year There were no other related party transactions as of December 31, 2017 and 2016.

Summary of Significant Accoun19

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation and Preparation	Basis of Presentation and Preparation The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The consolidated financial statements include the accounts of Veritone and all of its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated. The consolidated financial statements and accompanying notes are the representations of the Company’s management, who is responsible for their integrity and objectivity. In the opinion of the Company’s management, the consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. The preparation of these consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy, which is based on three levels of inputs, the first two of which are considered observable and the last unobservable, that may be used to measure fair value, is as follows: • Level 1—Quoted prices in active markets for identical assets or liabilities. • Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The Company’s financial instruments, other than its marketable securities and stock warrants, consist primarily of cash and cash equivalents (including money market funds), accounts receivable, accounts payable and convertible notes payable. The Company has determined that the carrying values of these instruments for the periods presented approximate fair value due to their short-term nature and the relatively stable current interest rate environment.
Revenue Recognition	Revenue Recognition Media Agency The Company’s media agency places advertisements for clients, primarily with radio broadcasters, podcasters and digital media producers. The Company negotiates its commission rates with its clients. Under the most common billing arrangements, the Company bills clients for the gross costs of the advertisement, which is set by the broadcaster, less any discounts based on negotiated commission rates. The Company remits to the broadcaster the gross amount less the standard commission deducted by the broadcaster. The commission amount negotiated with the client is recorded by the Company as media agency revenue. Media agency revenue is recognized when the advertisement is aired by the broadcaster in accordance with the client arrangement. Expenditures billable to clients are comprised primarily of production and media costs that have been incurred, and the associated fees that have been earned by the Company, but that have not yet been billed to clients. The Company’s clients are often required to make a deposit or pre-pay AI Platform The Company derives its AI platform revenues from a variety of arrangements: SaaS Agreements software-as-a-service Separate Processing Fees: Software Licenses In each of these arrangements, the Company recognizes revenue only when it has evidence that an arrangement exists, delivery has occurred, the fee is fixed or determinable, and collection is reasonably assured. The Company’s customer contracts do not contain general rights of return. However, credits may be issued to customers on a case-by-case In cases in which the Company’s SaaS offerings, software licenses and/or cognitive processing services are sold through independent third parties, such as resellers and distributors, any discounts below standard prices that are provided to such third parties are reflected as reductions in net revenue.
Cash Equivalents and Marketable Securities	Cash Equivalents and Marketable Securities All highly liquid investments with maturities of three months or less at the date of purchase are classified as cash equivalents. The Company’s marketable securities have been classified and accounted for as available-for-sale
Accounts Receivable and Expenditures Billable to Clients	Accounts Receivable and Expenditures Billable to Clients Accounts receivable consist primarily of amounts due from customers under normal trade terms. Allowances for uncollectible accounts are recorded based upon a number of factors that are reviewed by the Company on an ongoing basis, including historical amounts that have been written off, an evaluation of current economic conditions, and an assessment of customer creditworthiness. A considerable amount of judgment is required in assessing the ultimate realization of accounts receivable. The amounts due from clients based on costs incurred or fees earned that have not yet been billed to clients are reflected as expenditures billable to clients in the accompanying consolidated balance sheets.
Property, Equipment and Improvements	Property, Equipment and Improvements Property, equipment and improvements are stated at cost. Repairs and maintenance to these assets are charged to expense as incurred. Major improvements enhancing the function and/or useful life of the related assets are capitalized. Depreciation and amortization are computed using the straight-line method over the estimated useful lives (or lease term, if shorter) of the related assets. At the time of retirement or disposition of these assets, the cost and accumulated depreciation or amortization are removed from the accounts and any related gains or losses are recorded to earnings. The useful lives of property, equipment and improvements are as follows: • Property and equipment — 3 years • Leasehold improvements — 5 years or the remaining lease term, whichever is shorter The Company assesses the recoverability of property, equipment and improvements whenever events or changes in circumstances indicate that their carrying value may not be recoverable. There was no impairment of property, equipment and improvements for the periods presented.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company reviews long-lived assets to be held and used, other than goodwill, for impairment at least annually, or whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If an evaluation of recoverability is required, the estimated undiscounted future cash flows directly associated with the asset are compared to the asset’s carrying amount. If the estimated future cash flows from the use of the asset are less than the carrying value, an impairment write-down would be recorded to reduce the asset to its estimated fair value. In March 2016, the Company stopped pursuing a pending patent application for technology it acquired in 2014, and as a result, it recorded a charge of $500 in general and administrative expenses in its consolidated statement of operations and comprehensive loss for 2016 to fully impair such acquired patent. No impairment charges were recorded for the year ended December 31, 2017.
Asset Acquisitions	Asset Acquisitions The Company follows the guidance in ASC 805, Business Combinations
Stock-Based Compensation	Stock-Based Compensation The Company accounts for stock-based compensation in accordance with ASC 718, Compensation – Stock Compensation Determining the appropriate fair value of stock options at the grant date requires significant judgment, including estimating the volatility of the Company’s common stock and expected term of the awards. The Company estimates volatility based on the historical volatility of the shares of publicly-traded peers of the Company over the expected term, until sufficient information regarding the volatility of the Company’s shares of common stock becomes available. The expected term represents the period of time that stock options are expected to be outstanding and is determined using the simplified method. The simplified method defines the expected term as the average of the contractual term of the options and the vesting period for all tranches. The risk-free rate is based on the implied yield of U.S. Treasury notes as of the grant date with a remaining term approximately equal to the expected term of the award. Certain stock-based awards granted by the Company vest based upon the achievement of performance conditions established by the Compensation Committee of the Company’s Board of Directors. Until the Company has determined that the performance conditions have been met, the amount of expense that the Company records related to performance-based awards is estimated based on the likelihood of achieving the performance conditions. Estimated forfeitures are also taken into account in determining the amount of expense recorded by the Company. The fair value of stock-based awards, adjusted for estimated forfeitures (and adjusted for estimated or actual achievement of performance conditions in the case of awards having performance-based vesting conditions), is amortized using the straight-line attribution method over the requisite service period of the award, which is generally the vesting period. Tax benefits related to stock-based compensation are recognized as a reduction to deferred taxes until the related tax deductions reduce current income taxes. When such event occurs, the tax benefits are then recognized through additional paid in capital. The Company allocates the tax benefits based on the provisions in the tax laws that identify the sequence in which the amounts are utilized for tax purposes (see Note 11).
Advertising and Marketing Costs	Advertising and Marketing Costs Advertising and marketing costs are expensed as incurred and are primarily included in sales and marketing expenses in the Company’s consolidated statements of operations and comprehensive loss. Advertising and marketing costs include online and print advertising, public relations, tradeshows, and sponsorships. For the years ended December 31, 2017 and 2016, the Company recorded expense of $1,252 and $762, respectively, for advertising and marketing costs.
Research and Development Costs and Software Development Costs	Research and Development Costs and Software Development Costs Research and development costs are expensed as incurred. Costs related to the development of computer software to be sold, leased, or otherwise marketed are subject to capitalization beginning when a product’s technological feasibility has been established and ending when a product is available for general release to customers. In most instances, the Company’s products are released soon after technological feasibility has been established and, as a result, software development costs are expensed as incurred. No software development costs were capitalized in 2017 or 2016.
Income Taxes	Income Taxes The Company accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are established for temporary differences between the financial statement carrying amounts and the tax bases of the Company’s assets and liabilities using statutory tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered. The Company assesses the likelihood that the deferred tax assets will be recovered from future taxable income and, if recovery is not more likely than not, the Company establishes a valuation allowance to reduce the deferred tax assets to the amounts expected to be realized. Realization of the deferred tax assets is dependent on the Company generating sufficient taxable income in future years to obtain a benefit from the reversal of temporary differences and from net operating losses. The Company utilizes a two-step
Debt Issuance Costs	Debt Issuance Costs The Company deferred and amortized fees paid in connection with the issuance of its convertible notes payable. These fees were amortized using a method that approximates the effective interest method over the term of the related financing. The unamortized debt issuance costs were netted against the principal amounts of the convertible notes payable.
Discounts for Debt and Redeemable Convertible Stock	Discounts for Debt and Redeemable Convertible Preferred Stock The Company amortized debt discounts over the term of the debt using a method that approximates the effective interest method. The Company amortized discounts on its redeemable convertible preferred stock from the issuance date to the earliest redemption date using a method that approximates the effective interest method.
Concentration of Risk	Concentration of Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities and accounts receivable. The Company places its cash and cash equivalents with what management believes are quality financial institutions in the United States and performs periodic evaluations of the relative credit standing of these financial institutions in order to limit the amount of credit exposure with any one institution. At times, the value of the United States deposits exceeds federally insured limits. The Company has not experienced any losses in such accounts. The majority of the Company’s marketable securities are managed by an investment management firm, under the oversight of the Company’s senior financial management team. The portfolio manager invests the funds in accordance with the Company’s investment policy, which, among other things, limits the amounts that may be invested with one issuer. Such policy is reviewed regularly by the Company’s senior financial management team and the Audit Committee of the Company’s Board of Directors. Two customers accounted for approximately 24% and 30% of the Company’s net revenues for the years ended December 31, 2017 and 2016, respectively. These same customers accounted for $668 and $939 of the Company’s accounts receivable balance as of December 31, 2017 and 2016, respectively, which accounts receivable included production and media costs and the Company’s related commissions.
Earnings Per Share	Earnings Per Share Basic and diluted net loss per common share is presented in conformity with the two-class as-converted Under the two-class if-converted The following table presents the computation of basic and diluted net loss per common share: Year Ended 2017 2016 Numerator: Net loss $ (59,601 ) $ (26,979 ) Accretion of redeemable convertible preferred stock (4,470 ) (3,204 ) Net loss attributable to common stockholders $ (64,071 ) $ (30,183 ) Denominator: Weighted-average common shares outstanding 10,515,411 2,205,577 Less: Weighted-average shares subject to repurchase (182,818 ) (137,243 ) Denominator for basic and diluted net loss per share attributable to common stockholders 10,332,593 2,068,334 Basic and diluted net loss per share attributable to common stockholders $ (6.20 ) $ (14.59 ) The Company reported net losses attributable to common stockholders for all periods presented and, as such, all potentially dilutive shares of common stock would have been antidilutive for such periods. The table below presents the weighted-average securities (in common equivalent shares) outstanding during the periods presented that have been excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would be anti-dilutive: Year Ended 2017 2016 Common stock options and restricted stock units 3,148,931 680,437 Warrants to purchase common stock 1,120,053 2,493,449 Shares issuable upon conversion of the convertible note payable — 1,490,651 Redeemable convertible preferred stock — 5,083,932 Total 4,268,984 9,748,469
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 March 2016, the FASB issued ASU No. 2016-09, 2016-09)”. In August 2016, the FASB issued ASU 2016-15, In May 2017, the FASB issued ASU No. 2017-09,

Summary of Significant Accoun20

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
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 common share: Year Ended 2017 2016 Numerator: Net loss $ (59,601 ) $ (26,979 ) Accretion of redeemable convertible preferred stock (4,470 ) (3,204 ) Net loss attributable to common stockholders $ (64,071 ) $ (30,183 ) Denominator: Weighted-average common shares outstanding 10,515,411 2,205,577 Less: Weighted-average shares subject to repurchase (182,818 ) (137,243 ) Denominator for basic and diluted net loss per share attributable to common stockholders 10,332,593 2,068,334 Basic and diluted net loss per share attributable to common stockholders $ (6.20 ) $ (14.59 )
Effect of Anti-dilutive Securities	The table below presents the weighted-average securities (in common equivalent shares) outstanding during the periods presented that have been excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would be anti-dilutive: Year Ended 2017 2016 Common stock options and restricted stock units 3,148,931 680,437 Warrants to purchase common stock 1,120,053 2,493,449 Shares issuable upon conversion of the convertible note payable — 1,490,651 Redeemable convertible preferred stock — 5,083,932 Total 4,268,984 9,748,469

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
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, cash equivalents and marketable securities as of December 31, 2017: Cost Gross Fair Cash and Marketable 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 papers 4,959 (5 ) 4,954 — 4,954 Corporate debt securities 30,268 (112 ) 30,156 — 30,156 Subtotal 39,732 (134 ) 39,598 — 39,598 Total $ 69,277 $ (134 ) $ 69,143 $ 29,545 $ 39,598
Schedule of Maturities of Marketable Securities	As of December 31, 2017, the respective maturities of the Company’s marketable securities were as follows: Cost Fair Value Due in one year or less $ 26,004 $ 25,950 Due after one year through five years 13,728 13,648 Total $ 39,732 $ 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 used for the Company’s Primary Warrant that is categorized within the Level 3 fair value hierarchy: December 31, 2016 Volatility 80 % Risk free rate 1.84 % Discount for lack of marketability 20 % The following table summarizes quantitative information with respect to the significant unobservable inputs used for the Company’s Acacia Note Warrants that are categorized within the Level 3 fair value hierarchy as of December 31, 2016: First Tranche Second Tranche Volatility 80 % 80 % Risk free rate 1.61 % 1.68 % Discount for lack of marketability 20 % 20 % As a result, the following quantitative information was used to determine the fair value of the Company’s Acacia Note Warrants as of March 31, 2017: First Tranche Second Tranche Volatility 65 % 65 % Risk free rate 1.58 % 1.64 % Discount for lack of marketability 10 % 10 % The following table summarizes quantitative information with respect to the significant unobservable inputs used for the Company’s Bridge Loan Warrants which were issued to the Bridge Loan Lenders in March 2017, April 2017 and May 2017 that are categorized within the Level 3 fair value hierarchy: Volatility 70% Risk free rate 2.40% Discount for lack of marketability 10% The following table summarizes quantitative information with respect to the significant unobservable inputs used for the Company’s 10% Warrant that is also categorized as Level 3 within the fair value hierarchy: May 17, 2017 Volatility 70 % Risk free rate 1.44 % Discount for lack of marketability 0 %
Reconciliation of Level 3 Measurement of Company's Primary Warrant	The following table represents a reconciliation of the Level 3 measurement of the Company’s Primary Warrant: Balance, December 31, 2016 $ 7,114 Change in fair value of warrant liability (7,114 ) Balance, December 31, 2017 $ —

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Future Estimated Annual Amortization Expense	The following table summarizes the future estimated annual amortization expense for these assets over the next three years: Years Ending December 31, Minimum 2018 $ 1,011 2019 1,011 2020 1,004 Total $ 3,026

Consolidated Financial Statem23

Consolidated Financial Statements Details (Tables)	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Property Equipment and Improvements	Property, equipment and improvements consisted of the following: As of 2017 2016 Property and equipment $ 378 $ 164 Leasehold improvements 27 12 Construction in progress 435 — 840 176 Less: accumulated depreciation (160 ) (108 ) Property, equipment and improvements, net $ 680 $ 68
Summary Of Capitalized Software	Capitalized software is presented in the Company’s consolidated balance sheets under other assets and consisted of the following: As of 2017 2016 Capitalized software $ 471 $ 471 Less: accumulated depreciation (343 ) (150 ) Capitalized software, net $ 128 $ 321
Summary of Other Accrued Liabilities	Other accrued liabilities were comprised of the following: As of 2017 2016 Accrued payroll and benefits $ 3,117 $ 500 Other accruals 1,325 2,560 Total $ 4,442 $ 3,060
Summary of Net Revenues	Net revenues for the periods presented were comprised of the following: Year Ended 2017 2016 Media agency revenues $ 12,949 $ 8,404 AI platform revenues 1,464 507 Total net revenues $ 14,413 $ 8,911
Schedule of Other Expense, Net	Other expense, net for the years ended December 31, 2017 and 2016 were comprised of the following: Year Ended 2017 2016 Interest expense $ (4,236 ) $ (3,890 ) Interest income 211 6 Stock warrants issued (5,790 ) — Write-off (10,132 ) — Gain on fair value change of warrant liability 7,114 950 Other — (259 ) Other expense, net $ (12,833 ) $ (3,193 )

Convertible Notes Payable (Tabl

Convertible Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Reconciliation of Principal Amounts of Acacia Note and the Bridge Loan to Convertible Notes Payable	The following table represents a reconciliation of the principal amounts of the Acacia Note to the convertible note payable presented in the Company’s consolidated balance sheet as of December 31, 2016 (no balances were outstanding under the Acacia Note or Bridge Loan as of December 31, 2017): First Loan principal, August 15, 2016 $ 10,000 Second Loan principal, November 25, 2016 10,000 Debt discounts associated with stock warrants, net (6,793 ) Debt issuance costs, net (105 ) Accrued interest 286 Convertible note payable $ 13,388

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Summary of Future Minimum Rentals Under Leases	As of December 31, 2017, future minimum lease payments were as follows: Year Ending December 31, Minimum 2018 $ 416 2019 1,510 2020 1,819 2021 1,875 2022 1,833 Thereafter 3,137 Total $ 10,590

Stockholders' Equity (Deficit)

Stockholders' Equity (Deficit) (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Issuance of Warrants to Purchase Shares of Common Stock	During 2017, the Company issued warrants to purchase 1,122,840 shares of common stock, as listed below: Description Vesting terms Life in years Exercise Price Number of 10% Warrant 50% on issuance; 50% in May 2018 5 $ 13.6088 809,400 Bridge Loan Warrants Fully vested on issuance 10 $ 13.6088 313,440 During 2016, the Company issued warrants to purchase 2,552,068 shares of common stock, as listed below: Description Vesting terms Life in years Exercise Price Number of Acacia Note Warrants Fully vested on issuance 4 $ 13.6088 154,311 Acacia Primary Warrant Fully vested on issuance 5 $ 13.6088 2,150,335 Westwood One Upon achievement of performance condition 10 $ 8.0833 247,422

Stock Plans (Tables)

Stock Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Schedule of Fair Value Assumptions	The assumptions used in calculating the fair values of options granted during the years ended December 31, 2017 and 2016 are set forth in the table below: Year Ended December 31, 2017 Year Ended December 31, 2016 Expected terms (in years) 5.83 - 6.31 5.58 - 6.08 Expected volatility 52% -65% 55%% - 60% Risk-free interest rate 1.79% - 2.20% 1.30% - 1.72% Expected dividend yield — —
Schedule of Stock-based Compensation Expense	The stock-based compensation expense by type of award and by operating expense grouping are presented below: Year Ended 2017 2016 Stock-based compensation expense by type of award: Restricted stock $ 891 $ 151 Common stock awards 375 1,442 Restricted stock units 327 — Stock options 14,391 137 Employee stock purchase plan 105 — Total $ 16,089 $ 1,730 Stock-based compensation expense by operating expense grouping: Sales and marketing $ 438 $ 71 Research and development 464 31 General and administrative 15,187 1,628 Total $ 16,089 $ 1,730
Schedule of Restricted Stock Activity	The Company’s restricted stock activity for the year ended December 31, 2017 was as follows: Shares Weighted Unvested at December 31, 2016 208,886 $ 4.80 Granted 64,240 $ 15.47 Forfeited (22,241) $ 8.42 Vested (103,429) $ 8.50 Unvested at December 31, 2017 147,456 $ 6.30
Schedule of Stock Option Activity	The Company’s stock option activity for the year ended December 31, 2017 was as follows: No. of Weighted Exercise Weighted Aggregate Outstanding at December 31, 2016 680,434 $ 2.27 8.49 $ 3,031 Options Granted 4,383,208 $ 15.27 Options Exercised (80,829 ) $ 1.62 Options Forfeited (161,346 ) $ 9.90 Options Expired (18,873 ) $ 1.50 Outstanding at December 31, 2017 4,802,594 $ 13.89 9.17 $44,712 Exercisable at December 31, 2017 1,805,482 $ 12.44 8.85 $19,433 Vested and expected to vest at December 31, 2017 4,715,202 $ 13.87 9.17 $43,994
Employee Stock Purchase Plan [Member]
Schedule of Fair Value Assumptions	The assumptions used in calculating the fair values of purchase rights granted under the ESPP during the year ended December 31, 2017 are set forth in the table below: Year Ended December 31, 2017 Expected term (in years) 0.50 Expected volatility 53% Risk-free interest rate 1.15% Expected dividend yield —
Restricted Stock Units [Member]
Schedule of Restricted Stock Activity	The Company’s restricted stock units activity for the year ended December 31, 2017 was as follows: Shares Weighted Unvested at December 31, 2016 — $ — Granted 35,576 $ 14.76 Forfeited — $ — Vested — $ — Unvested at December 31, 2017 35,576 $ 14.76

Provision for Income Taxes (Tab

Provision for Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Provision for Income Taxes	The provision for income taxes consisted of the following for the years ended December 31, 2017 and 2016: Year Ended 2017 2016 Current: Federal $ — $ — State 6 6 Total current 6 6 Deferred: Federal (7,216 ) (6,658 ) State (1,210 ) 42 Total deferred (8,426 ) (6,616 ) Change in valuation allowance 8,426 6,616 Total deferred — — Provision for income taxes $ 6 $ 6
Components of Deferred Income Tax Assets and Liabilities	The significant components of the Company’s deferred income tax assets and liabilities as of December 31, 2017 and 2016 were as follows: As of As of Deferred tax assets: Net operating loss carryforwards and credits $ 13,844 $ 11,401 Stock-based compensation 3,416 — Accrued expenses 445 301 Research credits 490 — Other 83 66 18,278 11,768 Deferred tax liabilities: State taxes — — Convertible note payable — (1,823 ) Stock-based compensation — (94 ) — (1,917 ) Valuation allowance (18,278 ) (9,851 ) Total deferred tax liabilities $ — $ —
Difference Between Income Tax Expense at Federal Statutory Rate and Company's Effective Tax Rate	The difference between the income tax expense at the federal statutory rate and the Company’s effective tax rate from the Company’s continuing operations is as follows: December 31, December 31, Federal statutory rate 34.00 % 34.00 % State income tax rate, net of Federal tax benefit 1.28 (0.14 ) Mark to market adjustment on stock warrants 4.06 1.22 Meals and entertainment and other 1.67 1.16 Debt discount amortization (2.42 ) — Loss on stock warrants issued (3.30 ) — Loss on write-off (5.78 ) — Change in valuation allowance (12.61 ) (36.22 ) Rate change due to tax law change (16.89 ) — Effective tax rate 0.01 % 0.02 %

Description of Business - Addit

Description of Business - Additional Information (Detail) - USD ($)	Nov. 21, 2017	May 17, 2017	Nov. 30, 2017	May 31, 2017	Jul. 31, 2014	Dec. 31, 2017	Dec. 31, 2016	May 16, 2017
Organization [Line Items]
Common stock issued						13,538,080
Underwriting discounts, commissions and offering costs							$ 136,000
Net book value							23,350,000
Cash proceeds from exercise of warrants						$ 29,263,000
Proceeds from issuance of common stock						$ 56,468,000
Bridge Loan [Member]
Organization [Line Items]
Accrued interest		$ 45,000
Warrants to purchase common stock		313,440						240,000
Shares converted to common stock		590,717
Fully diluted shares outstanding percentage		1.50%
Series B Redeemable Convertible Preferred Stock [Member]
Organization [Line Items]
Common stock issued					3,092,781
Common stock price per share					$ 4.85
Liquidation preference value		$ 18,668,000
Net book value		$ 18,463,000					17,897,000
Shares converted to common stock		2,309,135				2,309,135
Series A Redeemable Convertible Preferred Stock [Member]
Organization [Line Items]
Common stock issued					3,000,000
Common stock price per share						$ 1.76
Liquidation preference value		$ 8,598,000
Net book value		$ 6,272,000					5,453,000
Shares converted to common stock		2,922,798				2,922,798
Initial Public Offering [Member]
Organization [Line Items]
Common stock issued		2,500,000				2,500,000
Common stock price per share		$ 15
Proceeds from issuance of common stock		$ 32,580,000
Underwriting discounts, commissions and offering costs		$ 4,920,000
Follow On Public Offering [Member]
Organization [Line Items]
Common stock issued	1,121,250		1,121,250
Common stock price per share	$ 23
Underwriting discounts, commissions and offering costs	$ 2,027
Proceeds from issuance of common stock	$ 23,762
Acacia [Member]
Organization [Line Items]
Debt instrument principal balance						$ 0
Warrants to purchase common stock						1,524,573
Acacia [Member] | Bridge Loan [Member]
Organization [Line Items]
Common stock issued		90,000
Debt instrument principal balance		$ 4,000,000
Warrants to purchase common stock		120,000
Line of credit maximum borrowing capacity		$ 8,000,000
Shares converted to common stock		590,717
Acacia [Member] | Initial Public Offering [Member]
Organization [Line Items]
Percentage of warrant exercise		10.00%
Acacia [Member] | Convertible Notes Payable [Member]
Organization [Line Items]
Shares converted to common stock		1,523,746				1,523,746
Debt instrument principal balance		$ 20,000,000					$ 20,000,000
Accrued interest		$ 737,000
Warrants maturity period							4 years
Acacia [Member] | Convertible Notes Payable [Member] | Initial Public Offering [Member]
Organization [Line Items]
Shares converted to common stock		1,523,746
Debt instrument principal balance		$ 20,000,000
Accrued interest		$ 737,000
Acacia [Member] | Convertible Notes Payable [Member] | Initial Public Offering [Member] | Bridge Loan [Member]
Organization [Line Items]
Shares converted to common stock		13.6088
Debt instrument principal balance		$ 8,000,000
Accrued interest		$ 45,000
Acacia [Member] | Primary Warrant [Member]
Organization [Line Items]
Issuance of stock due to warrants exercise		2,150,335				2,150,335
Cash proceeds from exercise of warrants		$ 29,263,000
Warrants maturity period		5 years
Warrants to purchase common stock		809,400
Percentage of warrant exercise		10.00%		10.00%

Summary of Significant Accoun30

Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)	Dec. 31, 2017USD ($)Customers	Dec. 31, 2016USD ($)Customers
Property, Plant and Equipment [Line Items]
General and administrative expense		$ 31,436,000	$ 14,935,000
Impairment charges	$ 0
Advertising and marketing costs		1,252,000	762,000
Capitalized software development costs		0	0
Liability for Uncertain Tax Positions, Current		0	0
Accounts receivable, net		$ 7,691,000	$ 4,834,000
Preferred Stock, Dividend Rate, Percentage		8.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Property, Plant and Equipment [Line Items]
Concentration risk percentage		24.00%	30.00%
Number of major customers | Customers		2	2
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Property, Plant and Equipment [Line Items]
Accounts receivable, net		$ 668,000	$ 939,000
Patents [Member]
Property, Plant and Equipment [Line Items]
General and administrative expense	$ 500,000
Property and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful lives of property, equipment and improvements		3 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful lives of property, equipment and improvements		5 years
Useful lives of property, equipment and improvements		5 years or the remaining lease term, whichever is shorter

Summary of Significant Accoun31

Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Loss Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net loss	$ (59,601)	$ (26,979)
Accretion of redeemable convertible preferred stock	(4,470)	(3,204)
Net loss attributable to common stockholders	$ (64,071)	$ (30,183)
Denominator:
Weighted-average common shares outstanding	10,515,411	2,205,577
Less: Weighted-average shares subject to repurchase	(182,818)	(137,243)
Denominator for basic and diluted net loss per share attributable to common stockholders	10,332,593	2,068,334
Basic and diluted net loss per share attributable to common stockholders	$ (6.20)	$ (14.59)

Summary of Significant Accoun32

Summary of Significant Accounting Policies - Effect of Anti-dilutive Securities (Detail) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	4,268,984	9,748,469
Redeemable Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities		5,083,932
Employee Stock Option and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	3,148,931	680,437
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	1,120,053	2,493,449
Conversion of Convertible Note Payable [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities		1,490,651

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	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 69,277
Gross Unrealized Losses	(134)
Fair Value	69,143
Cash and cash equivalents	29,545	$ 12,078	$ 19,197
Marketable securities	39,598
Cash [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	8,925
Fair Value	8,925
Cash and cash equivalents	8,925	9,922
Level 1 [Member] | Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	20,620
Fair Value	20,620
Cash and cash equivalents	20,620	$ 2,156
Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	39,732
Gross Unrealized Losses	(134)
Fair Value	39,598
Marketable securities	39,598
U.S. Government Securities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	4,505
Gross Unrealized Losses	(17)
Fair Value	4,488
Marketable securities	4,488
Commercial Papers [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	4,959
Gross Unrealized Losses	(5)
Fair Value	4,954
Marketable securities	4,954
Corporate Debt Securities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	30,268
Gross Unrealized Losses	(112)
Fair Value	30,156
Marketable securities	$ 30,156

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - USD ($)	May 17, 2017	May 31, 2017	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents			$ 29,545,000		$ 12,078,000	$ 19,197,000
Fair market value of warrants					7,114,000
Acacia Note Warrants [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of warrants					$ 507,000
Warrant exercise price					$ 13.6088
Primary Warrant [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of warrants					$ 8,064,000
Primary Warrant [Member] | Acacia [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage of warrant exercise	10.00%	10.00%
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
Initial Public Offering [Member] | Acacia [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of warrants	$ 5,790,000
Percentage of warrant exercise	10.00%
Initial Public Offering [Member] | Amended Primary Warrant [Member]
Schedule of Available-for-sale Securities [Line Items]
Warrant exercise price				$ 13.6088
Bridge Loan [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of warrants			6,534,000
Cash [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents			8,925,000		9,922,000
Level 1 [Member] | Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents			$ 20,620,000		$ 2,156,000

Financial Instruments - Sched35

Financial Instruments - Schedule of Maturities of Marketable Securities (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Cost
Due in one year or less	$ 26,004
Due after one year through five years	13,728
Cost, total	39,732
Fair Value
Due in one year or less	25,950
Due after one year through five years	13,648
Fair value, total	$ 39,598

Financial Instruments - Summary

Financial Instruments - Summary of Quantitative Information with Respect to Significant Unobservable Inputs (Detail)	May 17, 2017	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Volatility	70.00%
Risk free rate	1.44%
Discount for lack of marketability	0.00%
Primary Warrant [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Volatility				80.00%
Risk free rate				1.84%
Discount for lack of marketability				20.00%
Acacia Note Warrants [Member] | First Tranche [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Volatility		65.00%		80.00%
Risk free rate		1.58%		1.61%
Discount for lack of marketability		10.00%		20.00%
Acacia Note Warrants [Member] | Second Tranche [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Volatility		65.00%		80.00%
Risk free rate		1.64%		1.68%
Discount for lack of marketability		10.00%		20.00%
Bridge Loan Warrants [Member] | 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	12 Months Ended
	Dec. 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	$ (7,114)

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Finite-Lived Intangible Assets [Line Items]
Definite-lived assets amortization period	3 years
Amortization expense of definite-lived assets	$ 8
Atigeo Corporation [Member]
Finite-Lived Intangible Assets [Line Items]
Total consideration related to acquisition	3,004
Atigeo Corporation [Member] | Domain Name [Member]
Finite-Lived Intangible Assets [Line Items]
Total consideration related to acquisition	$ 30

Intangible Assets - Summary of

Intangible Assets - Summary of Future Estimated Annual Amortization Expense (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	$ 1,011
2,019	1,011
2,020	1,004
Total	$ 3,026

Consolidated Financial Statem40

Consolidated Financial Statements Details - Summary of Property Equipment and Improvements (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property and equipment	$ 378	$ 164
Leasehold improvements	27	12
Construction in progress	435
Property, equipment and improvements, gross	840	176
Less: accumulated depreciation	(160)	(108)
Property, equipment and improvements, net	$ 680	$ 68

Consolidated Financial Statem41

Consolidated Financial Statements Details - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Depreciation Expense	$ 52	$ 32
Amortization Expense	193	119
Capitalized software, net	128	321
Gross media placements	113,513	75,074
Cost of revenues	1,070	1,577
Amortization of deferred debt discounts and issuance costs	3,740	3,604
Convertible Notes Payable [Member]
Condensed Financial Statements, Captions [Line Items]
Amortization of deferred debt discounts and issuance costs	3,740	3,603
Billed Revenues [Member]
Condensed Financial Statements, Captions [Line Items]
Gross media placements	95,989	64,923
Netted Against Billings [Member]
Condensed Financial Statements, Captions [Line Items]
Cost of revenues	$ 83,040	$ 56,519

Consolidated Financial Statem42

Consolidated Financial Statements Details - Summary of Capitalized Software (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Capitalized Computer Software, Net [Abstract]
Capitalized software	$ 471	$ 471
Less: accumulated depreciation	(343)	(150)
Capitalized software, net	$ 128	$ 321

Consolidated Financial Statem43

Consolidated Financial Statements Details - Summary of Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accrued Liabilities and Other Liabilities [Abstract]
Accrued payroll and benefits	$ 3,117	$ 500
Other accruals	1,325	2,560
Total	$ 4,442	$ 3,060

Consolidated Financial Statem44

Consolidated Financial Statements Details - Summary of Net Revenues (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Total net revenues	$ 14,413	$ 8,911
Media Agency Revenues [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Total net revenues	12,949	8,404
AI Platform Revenues [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Total net revenues	$ 1,464	$ 507

Consolidated Financial Statem45

Consolidated Financial Statements Details - Schedule of Other Expense, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other Income and Expenses [Abstract]
Interest expense	$ (4,236)	$ (3,890)
Interest income	211	6
Stock warrants issued	(5,790)
Write-off of deferred debt discounts and issuance costs	(10,132)
Gain on fair value change of warrant liability	7,114	950
Other		(259)
Other expense, net	$ (12,833)	$ (3,193)

Convertible Notes Payable - Add

Convertible Notes Payable - Additional Information (Detail) - USD ($)	May 17, 2017	Apr. 30, 2017	May 31, 2017	Apr. 30, 2017	Mar. 31, 2017	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	May 16, 2017
Debt Instrument [Line Items]
Number of warrants issued							1,122,840	2,552,068
Fair market value of warrants								$ 7,114,000
Common stock issued							13,538,080
Debt discounts associated with stock warrants								6,793,000
Charges recorded on issuance of additional common stock and warrants								$ 159,000
Common Stock [Member]
Debt Instrument [Line Items]
Common stock issued								106,420
Bridge Loan [Member]
Debt Instrument [Line Items]
Fair market value of warrants							$ 6,534,000
Accrued interest	$ 45,000
Warrants to purchase common stock	313,440								240,000
Fully diluted shares outstanding percentage	1.50%
Shares converted to common stock	590,717
Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Common stock issued					120,000
Primary Warrant [Member]
Debt Instrument [Line Items]
Fair market value of warrants								$ 8,064,000
Bridge Loan [Member]
Debt Instrument [Line Items]
Debt instrument principal balance							$ 0
Borrowing under line of credit					$ 2,000,000
Common stock issued					90,000
Warrants to purchase common stock	313,440								240,000
Fully diluted shares outstanding percentage	1.50%
Amortization of debt discount				$ 3,664,000	$ 3,664,000
Shares converted to common stock							590,717
Bridge Loan [Member] | Common Stock [Member]
Debt Instrument [Line Items]
Common stock issued							300,000
Shares converted to common stock							590,717
Bridge Loan [Member] | Note Purchase Agreement [Member] | VLOC, LLC [Member]
Debt Instrument [Line Items]
Line of credit, interest rate					8.00%
Borrowing under line of credit					$ 2,000,000
Common stock issued						120,000
Initial Public Offering [Member]
Debt Instrument [Line Items]
Common stock issued	2,500,000						2,500,000
Acacia [Member]
Debt Instrument [Line Items]
Debt instrument principal balance							$ 0
Warrants to purchase common stock							1,524,573
Acacia [Member] | Bridge Loan [Member]
Debt Instrument [Line Items]
Debt instrument principal balance	$ 4,000,000
Common stock issued	90,000
Warrants to purchase common stock	120,000
Shares converted to common stock	590,717
Acacia [Member] | Primary Warrant [Member]
Debt Instrument [Line Items]
Warrants maturity period	5 years
Warrants to purchase common stock	809,400
Acacia [Member] | Primary Warrant [Member] | Maximum [Member]
Debt Instrument [Line Items]
Warrants exercise price value								50,000,000
Acacia [Member] | Convertible Notes Payable [Member]
Debt Instrument [Line Items]
Debt instrument principal balance	$ 20,000,000							$ 20,000,000
Debt instrument interest rate								6.00%
Debt instrument maturity date								Nov. 30, 2017
Number of warrants issued								3
Warrants maturity period								4 years
Fair market value of warrants								$ 841,000
Accrued interest	$ 737,000
Shares converted to common stock	1,523,746						1,523,746
Acacia [Member] | Bridge Loan [Member]
Debt Instrument [Line Items]
Debt instrument principal balance		$ 8,000,000	$ 8,000,000	$ 8,000,000	$ 8,000,000	$ 8,000,000
Borrowing under line of credit		$ 2,000,000	$ 4,000,000
Common stock issued	180,000
Acacia [Member] | Initial Public Offering [Member]
Debt Instrument [Line Items]
Fair market value of warrants	$ 5,790,000
Acacia [Member] | Initial Public Offering [Member] | Convertible Notes Payable [Member]
Debt Instrument [Line Items]
Debt instrument principal balance	20,000,000
Accrued interest	$ 737,000
Shares converted to common stock	1,523,746
Conversion price per share	$ 13.6088
Write off of unamortized balance of debt discounts associated with stock warrants							$ 4,347,000
Acacia [Member] | Initial Public Offering [Member] | Convertible Notes Payable [Member] | Bridge Loan [Member]
Debt Instrument [Line Items]
Debt instrument principal balance	$ 8,000,000
Accrued interest	$ 45,000
Shares converted to common stock	13.6088
Borrowing under line of credit	$ 4,000,000
Debt discounts associated with stock warrants	2,915,000
Acacia [Member] | Initial Public Offering [Member] | Convertible Notes Payable [Member] | Bridge Loan [Member] | Common Stock [Member]
Debt Instrument [Line Items]
Charges recorded on issuance of additional common stock and warrants	1,100,000
Acacia [Member] | Initial Public Offering [Member] | Convertible Notes Payable [Member] | Bridge Loan [Member] | Warrant [Member]
Debt Instrument [Line Items]
Charges recorded on issuance of additional common stock and warrants	$ 1,770,000

Convertible Notes Payable - Rec

Convertible Notes Payable - Reconciliation of Principal Amounts of Acacia Note and the Bridge Loan to Convertible Notes Payable (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Debt discounts associated with stock warrants, net	$ (6,793)
Debt issuance costs, net	(105)
Accrued interest	286
Convertible note payable	13,388
First Loans [Member]
Debt Instrument [Line Items]
Borrowings	10,000
Second Loans [Member]
Debt Instrument [Line Items]
Borrowings	$ 10,000

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Thousands	Jul. 24, 2017USD ($)ft²Options	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)ft²shares	Dec. 31, 2016USD ($)
Other Commitments [Line Items]
Rent expense			$ 866	$ 588
Building Lease Agreement [Member]
Other Commitments [Line Items]
Lease provided area of office space (in square feet) | ft²	38,875
Office building lease agreement, renewal terms	5 years
Number of lease renewal options (in leases) | Options	2
Total minimum lease payments	$ 114		$ 10,590
San Diego [Member]
Other Commitments [Line Items]
Lease provided area of office space (in square feet) | ft²			7,965
Total minimum lease payments			$ 21
Operating lease agreements expiring			Aug. 31, 2022
Professional Employer Organization [Member]
Other Commitments [Line Items]
Settlement of claim			$ 400
Chad Steelberg and Ryan Steelberg [Member]
Other Commitments [Line Items]
Estimated common stock calculated value		$ 125
Chad Steelberg [Member]
Other Commitments [Line Items]
Share-based compensation arrangement by share-based payment award, shares issued in period | shares			17,807
Ryan Steelberg [Member]
Other Commitments [Line Items]
Annual salary under agreement			$ 350

Commitments and Contingencies49

Commitments and Contingencies - Summary of Future Minimum Rentals Under Leases (Detail) - Building Lease Agreement [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Jul. 24, 2017
2,018	$ 416
2,019	1,510
2,020	1,819
2,021	1,875
2,022	1,833
Thereafter	3,137
Total	$ 10,590	$ 114

Redeemable Convertible Prefer50

Redeemable Convertible Preferred Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	May 17, 2017	Jul. 31, 2016	Jul. 31, 2014	Dec. 31, 2017	Dec. 31, 2016	May 31, 2017	Apr. 30, 2017
Class of Stock [Line Items]
Stock issued during period, Shares				13,538,080
Preferred stock conversion basis					In the conversion to common stock, the holders of the redeemable convertible preferred stock would receive one share of the Company's common stock for each share of redeemable convertible preferred stock multiplied by the share's liquidation preference divided by its original issue price.
Minimum proceeds from initial public offering that converts preferred stock into common stock					$ 15,000
Net book value					$ 23,350
Preferred Stock, authorized						1,000,000	11,500,000
Preferred Stock, par value							$ 0.001
Series A-1 Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Stock issued during period, Shares			2,666,667
Series A Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Stock issued during period, Shares			3,000,000
Share price				$ 1.76
Net NM's asset book value				$ 1,500
Preferred stock redemption terms					The preferred stock was redeemable at any time after July 15, 2019 if the holders of the minimum number of outstanding shares made that election.
Preferred stock, liquidation preference per share					$ 2.14
Liquidation preference value	$ 8,598
Net book value	$ 6,272				$ 5,453
Shares converted to common stock	2,922,798			2,922,798
Change in liquidation preference and net book value	$ 2,326
Debt beneficial conversion feature				$ 328
Debt amortization of discount				96
Write-off of unamortized portion of beneficial conversion feature				$ 232
Preferred Stock, authorized				0	5,666,667
Preferred Stock, par value				$ 0.001	$ 0.001
Series B Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Stock issued during period, Shares			3,092,781
Share price			$ 4.85
Proceeds from Preferred stock issue			$ 15,000
Preferred stock, liquidation preference per share					$ 5.86
Liquidation preference value	18,668
Net book value	$ 18,463				$ 17,897
Shares converted to common stock	2,309,135			2,309,135
Change in liquidation preference and net book value	$ 205
Debt beneficial conversion feature				$ 226
Debt amortization of discount				67
Write-off of unamortized portion of beneficial conversion feature				$ 159
Preferred Stock, authorized				0	3,092,781
Preferred Stock, par value				$ 0.001	$ 0.001
Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock conversion basis		All outstanding shares of Series A-1 preferred stock were converted on a one-for-one basis into shares of Series A preferred stock.

Stockholders' Equity (Deficit51

Stockholders' Equity (Deficit) - Additional Information (Detail)

Nov. 21, 2017$ / sharesshares

May 17, 2017$ / sharesshares

Apr. 30, 2017USD ($)$ / sharesshares

Apr. 20, 2017

Jan. 04, 2017USD ($)shares

Nov. 30, 2017shares

May 31, 2017USD ($)$ / sharesshares

Apr. 30, 2017USD ($)$ / sharesshares

Mar. 31, 2017USD ($)shares

Apr. 30, 2016$ / sharesshares

Jul. 31, 2014$ / sharesshares

Dec. 31, 2017$ / sharesshares

Dec. 31, 2016USD ($)$ / sharesshares

May 16, 2017shares

Class of Stock [Line Items]

Reverse stock split ratio

0.6

Stockholders' equity, reverse stock split

0.6-for-1.0

Common stock, shares authorized

38,500,000

75,000,000

38,500,000

75,000,000

38,500,000

Common stock, par value | $ / shares

$ 0.001

$ 0.001

$ 0.001

Common stock shares issued

13,538,080

Repurchase of common stock

7,500

7,500

Share based lump sum payment | $

$ 350,000

Payment of buyback of common stock | $

$ 56,000

Issuance of warrants to purchase common stock

1,122,840

2,552,068

Bridge Loan [Member]

Class of Stock [Line Items]

Common stock shares issued

90,000

Borrowing under line of credit | $

$ 2,000,000

Shares converted to common stock

590,717

Warrants outstanding

313,440

240,000

Dissenting stockholder [Member]

Class of Stock [Line Items]

Payments for estimated taxes and reimbursement of certain legal fees for the shares | $

$ 287,000

Acacia [Member]

Class of Stock [Line Items]

Warrants outstanding

1,524,573

Acacia [Member] | Bridge Loan [Member]

Class of Stock [Line Items]

Common stock shares issued

180,000

Borrowing under line of credit | $

$ 2,000,000

$ 4,000,000

Acacia [Member] | Convertible Notes Payable [Member]

Class of Stock [Line Items]

Shares converted to common stock

1,523,746

1,523,746

Issuance of warrants to purchase common stock

3

Acacia [Member] | Primary Warrant [Member]

Class of Stock [Line Items]

Issuance of stock due to warrants exercise

2,150,335

2,150,335

Warrants outstanding

809,400

VLOC, LLC [Member] | Bridge Loan [Member]

Class of Stock [Line Items]

Common stock shares issued

90,000

Borrowing under line of credit | $

$ 4,000,000

Series B Redeemable Convertible Preferred Stock [Member]

Class of Stock [Line Items]

Common stock shares issued

3,092,781

Shares converted to common stock

2,309,135

2,309,135

Share price | $ / shares

$ 4.85

Series A Redeemable Convertible Preferred Stock [Member]

Class of Stock [Line Items]

Common stock shares issued

3,000,000

Shares converted to common stock

2,922,798

2,922,798

Share price | $ / shares

$ 1.76

Initial Public Offering [Member]

Class of Stock [Line Items]

Common stock shares issued

2,500,000

2,500,000

Share price | $ / shares

$ 15

Initial Public Offering [Member] | Acacia [Member] | Convertible Notes Payable [Member]

Class of Stock [Line Items]

Shares converted to common stock

1,523,746

Follow On Public Offering [Member]

Class of Stock [Line Items]

Common stock shares issued

1,121,250

1,121,250

Share price | $ / shares

$ 23

Note Purchase Agreement [Member]

Class of Stock [Line Items]

Common stock shares issued

120,000

Common Stock [Member]

Class of Stock [Line Items]

Common stock shares issued

106,420

Repurchase of common stock

7,500

Common Stock [Member] | Bridge Loan [Member]

Class of Stock [Line Items]

Common stock shares issued

300,000

Shares converted to common stock

590,717

Common Stock [Member] | Chad Steelberg and Ryan Steelberg [Member]

Class of Stock [Line Items]

Stock issued

961,835

961,835

Share price | $ / shares

$ 1.50

$ 1.50

$ 1.50

Service period

4 months

Stock-based compensation expense | $

$ 1,443,000

Common Stock [Member] | Dissenting stockholder [Member]

Class of Stock [Line Items]

Common stock shares issued

106,420

3,621,250

Common Stock [Member] | Series B Redeemable Convertible Preferred Stock [Member]

Class of Stock [Line Items]

Shares converted to common stock

2,309,135

Common Stock [Member] | Series A Redeemable Convertible Preferred Stock [Member]

Class of Stock [Line Items]

Shares converted to common stock

2,922,798

Restricted Stock [Member]

Class of Stock [Line Items]

Number of shares of restricted common stock forfeited

22,243

Shares, Vested

1,227

Common Stock Awards [Member]

Class of Stock [Line Items]

Common stock shares issued

145,069

General and Administrative [Member]

Class of Stock [Line Items]

Settlement expense | $

$ 294

General and Administrative [Member] | Dissenting stockholder [Member]

Class of Stock [Line Items]

Stock-based compensation expense | $

$ 159,000

Consultants [Member]

Class of Stock [Line Items]

Common stock shares issued

6,000

Stockholders' Equity (Deficit52

Stockholders' Equity (Deficit) - Schedule of Issuance of Warrants to Purchase Shares of Common Stock (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Class of Warrant or Right [Line Items]
Number of shares of common stock	1,122,840	2,552,068
10% Warrant [Member]
Class of Warrant or Right [Line Items]
Vesting terms	50% on issuance; 50% in May 2018
Life in years	5 years
Exercise Price	$ 13.6088
Number of shares of common stock	809,400
Bridge Loan Warrants [Member]
Class of Warrant or Right [Line Items]
Vesting terms	Fully vested on issuance
Life in years	10 years
Exercise Price	$ 13.6088
Number of shares of common stock	313,440
Acacia Note Warrants [Member]
Class of Warrant or Right [Line Items]
Vesting terms		Fully vested on issuance
Life in years		4 years
Exercise Price		$ 13.6088
Number of shares of common stock		154,311
Acacia Primary Warrants [Member]
Class of Warrant or Right [Line Items]
Vesting terms		Fully vested on issuance
Life in years		5 years
Exercise Price		$ 13.6088
Number of shares of common stock		2,150,335
Westwood One [Member]
Class of Warrant or Right [Line Items]
Vesting terms		Upon achievement of performance condition
Life in years		10 years
Exercise Price		$ 8.0833
Number of shares of common stock		247,422

Stock Plans - Additional Inform

Stock Plans - Additional Information (Detail) - USD ($)	1 Months Ended		12 Months Ended
	May 31, 2017	Apr. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Stock-based compensation expense			$ 16,089,000	$ 1,730,000
Expected forfeitures rate			10.00%	10.00%
Accrued employee contributions			$ 3,117,000	$ 500,000
2017 Stock Incentive Plan [Member]
Class of Stock [Line Items]
Common stock reserved for future issuance		2,000,000	1,372,767
Annual shares increase for future issuance by percentage under employee stock purchase plans		3.00%
Vesting period			1 year
2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member]
Class of Stock [Line Items]
Vesting period			4 years
Options Granted			4,383,208
Options exercise price			$ 15.27
Unrecognized compensation expense related to stock options			$ 23,408,000
Employee Stock Purchase Plan [Member]
Class of Stock [Line Items]
Common stock reserved for future issuance		1,000,000
Annual shares increase for future issuance by percentage under employee stock purchase plans		1.00%
Maximum number of shares per employee in each purchase		1,000
Accrued employee contributions			$ 253,000
Common stock granted			0
Time-based Stock Option [Member] | Chad Steelberg and Ryan Steelberg [Member]
Class of Stock [Line Items]
Vesting period	3 years
Options Granted	2,089,638
Options exercise price	$ 15
Performance- based Stock Option [Member]
Class of Stock [Line Items]
Stock-based compensation expense			$ 9,282,000
Performance- based Stock Option [Member] | Chad Steelberg and Ryan Steelberg [Member]
Class of Stock [Line Items]
Vesting period	5 years
Options Granted	1,044,818
Options exercise price	$ 15
Vesting rights description	The performance-based stock options were to vest upon the earlier of the first date on which the market capitalization of the Company's common stock equaled or exceeded $400,000 over five consecutive business days, or five years after the IPO
Vesting rights, market capitalization	$ 400,000
Vesting rights, consecutive trading days	5 days
Restricted Stock [Member]
Class of Stock [Line Items]
Stock-based compensation expense			$ 891,000	$ 151,000
Weighted Average Grant Date Fair Value, Granted			$ 15.47	$ 4.71
Fair value of restricted stock vested			$ 2,185	$ 243
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			$ 1,030,000
Cost of share-based compensation awards, recognition period			2 years 2 months 12 days
Weighted Average Grant Date Fair Value, Granted			$ 15.47
Restricted Stock Units [Member]
Class of Stock [Line Items]
Stock-based compensation expense			$ 327,000
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			$ 197,000
Cost of share-based compensation awards, recognition period			4 months 24 days
Weighted Average Grant Date Fair Value, Granted			$ 14.76
Stock Options [Member]
Class of Stock [Line Items]
Stock-based compensation expense			$ 14,391,000	$ 137,000
Weighted Average Grant Date Fair Value, Granted			$ 8.95	$ 2.14
Aggregate intrinsic value of the options exercised			$ 1,875	$ 258
Total grant date fair value of stock options vested			$ 13,094	$ 95
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 9 months 18 days
Maximum [Member] | 2017 Stock Incentive Plan [Member]
Class of Stock [Line Items]
Increase in common stock reserved for future issuance		750,000
Maximum [Member] | Employee Stock Purchase Plan [Member]
Class of Stock [Line Items]
Increase in common stock reserved for future issuance		250,000
Minimum [Member] | Employee Stock Purchase Plan [Member]
Class of Stock [Line Items]
Percentage of purchase price of common stock fair value		85.00%
Common stock fair market value		$ 25

Stock Plans - Schedule of Fair

Stock Plans - Schedule of Fair Value Assumptions (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	1.79%	1.30%
Risk-free interest rate, maximum	2.20%	1.72%
Expected dividend yield	0.00%	0.00%
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	6 months
Expected volatility	53.00%
Risk-free interest rate	1.15%
Expected dividend yield	0.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	5 years 9 months 29 days	5 years 6 months 29 days
Expected volatility	52.00%	55.00%
Expected dividend yield	0.00%	0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	9 years 11 months 4 days	6 years 29 days
Expected volatility	65.00%	60.00%
Expected dividend yield	0.00%	0.00%

Stock Plans - Schedule of Stock

Stock Plans - Schedule of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 16,089	$ 1,730
Sales and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	438	71
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	464	31
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	15,187	1,628
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	105
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	891	151
Common Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	375	1,442
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	327
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 14,391	$ 137

Stock Plans - Schedule of Restr

Stock Plans - Schedule of Restricted Stock Activity (Detail) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Forfeited	(22,243)
Shares, Vested	(1,227)
Weighted Average Grant Date Fair Value, Granted	$ 15.47	$ 4.71
2014 Plan Stock Options/Stock Issuance Plan and 2017 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Unvested, Beginning Balance	208,886
Shares, Granted	64,240
Shares, Forfeited	(22,241)
Shares, Vested	(103,429)
Shares, Unvested, Ending Balance	147,456	208,886
Weighted Average Grant Date Fair Value, Unvested, Beginning Balance	$ 4.80
Weighted Average Grant Date Fair Value, Granted	15.47
Weighted Average Grant Date Fair Value, Forfeited	8.42
Weighted Average Grant Date Fair Value, Vested	8.50
Weighted Average Grant Date Fair Value, Unvested, Ending Balance	$ 6.30	$ 4.80

Stock Plans - Schedule of Res57

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]	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Granted | shares	35,576
Shares, Forfeited | shares	0
Shares, Vested | shares	0
Shares, Unvested, Ending Balance | shares	35,576
Weighted Average Grant Date Fair Value, Granted | $ / shares	$ 14.76
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	0
Weighted Average Grant Date Fair Value, Vested | $ / shares	0
Weighted Average Grant Date Fair Value, Unvested, Ending Balance | $ / shares	$ 14.76

Stock Plans - Schedule of Sto58

Stock Plans - Schedule of Stock Option Activity (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Aggregate Intrinsic Value	$ 44,712	$ 3,031
Weighted-Average Aggregate Intrinsic Value, Exercisable	19,433
Weighted-Average Aggregate Intrinsic Value, Vested and expected to vest	$ 43,994
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	680,434
Options Granted	4,383,208
Options Exercised	(80,829)
Options Forfeited	(161,346)
Options Expired	(18,873)
Options, Outstanding, Ending Balance	4,802,594	680,434
Options,Exercisable at December 31, 2017	1,805,482
Vested and expected to vest at December 31, 2017	4,715,202
Weighted-Average Exercise Price, Outstanding, Beginning Balance	$ 2.27
Weighted-Average Exercise Price, Options Granted	15.27
Weighted-Average Exercise Price, Options Exercised	1.62
Weighted-Average Exercise Price, Options Forfeited	9.90
Weighted-Average Exercise Price, Options Expired	1.50
Weighted-Average Exercise Price, Outstanding, Ending Balance	13.89	$ 2.27
Weighted-Average Exercise Price, Exercisable	12.44
Weighted-Average Exercise Price, Vested and expected to vest	$ 13.87
Weighted-Average Remaining Contractual Term, Outstanding	9 years 2 months 1 day	8 years 5 months 27 days
Weighted-Average Remaining Exercisable	8 years 10 months 6 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest	9 years 2 months 1 day

Provision for Income Taxes - Ad

Provision for Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes Disclosure [Line Items]
Federal Statutory Rate		34.00%	34.00%
Deferred tax due to tax reform		$ 10,000
Change in valuation allowance		8,426	$ 6,616
Research and expenditure credit carry forward		490
Pre-tax unrecognized excess tax benefits		$ 2,100	$ 0
Open tax year		2,014
Scenario, Plan [Member]
Income Taxes Disclosure [Line Items]
Federal Statutory Rate	21.00%
Maximum [Member]
Income Taxes Disclosure [Line Items]
Federal Statutory Rate		35.00%
Federal [Member]
Income Taxes Disclosure [Line Items]
Operating loss carry forward		$ 62,036
Research and expenditure credit carry forward		$ 200
Research and expenditure credit expiration date		Jan. 1, 2026
State [Member]
Income Taxes Disclosure [Line Items]
Operating loss carry forward		$ 61,807
Research and expenditure credit carry forward		$ 200

Provision for Income Taxes - Sc

Provision for Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 0	$ 0
State	6	6
Total current	6	6
Deferred:
Federal	(7,216)	(6,658)
State	(1,210)	42
Total deferred	(8,426)	(6,616)
Change in valuation allowance	8,426	6,616
Total deferred	0	0
Provision for income taxes	$ 6	$ 6

Provision for Income Taxes - Co

Provision for Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Components of Deferred Tax Assets and Liabilities [Abstract]
Net operating loss carryforwards and credits	$ 13,844	$ 11,401
Stock-based compensation	3,416
Accrued expenses	445	301
Research credits	490
Other	83	66
Total deferred tax assets	18,278	11,768
State taxes	6	6
Convertible note payable		(1,823)
Stock-based compensation		(94)
Total deferred tax liabilities		(1,917)
Valuation allowance	(18,278)	(9,851)
Total deferred tax liabilities	$ 0	$ 0

Provision for Income Taxes - Di

Provision for Income Taxes - Difference Between Income Tax Expense at Federal Statutory Rate and Company's Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal Statutory Rate	34.00%	34.00%
State income tax rate, net of Federal tax benefit	1.28%	(0.14%)
Mark to market adjustment on stock warrants	4.06%	1.22%
Meals and entertainment and other	1.67%	1.16%
Debt discount amortization	(2.42%)
Loss on stock warrants issued	(3.30%)
Loss on write-off of deferred debt discount	(5.78%)
Change in valuation allowance	(12.61%)	(36.22%)
Rate change due to tax law change	(16.89%)
Effective tax rate	0.01%	0.02%

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Apr. 30, 2017$ / sharesshares	Apr. 30, 2016$ / sharesshares	Dec. 31, 2017USD ($)Option	Dec. 31, 2016USD ($)
VLOC, LLC [Member] | Note Purchase Agreement [Member] | Chad Steelberg and Ryan Steelberg [Member]
Related Party Transaction [Line Items]
Ownership percentage			50.00%
Healthcare Plans [Member] | Chad Steelberg and Ryan Steelberg [Member]
Related Party Transaction [Line Items]
Related party transaction expenses			$ 58,000	$ 73,000
Due to related party			0	$ 73,000
Intercompany Administrative Services Agreement [Member] | Steel Ventures, LLC [Member]
Related Party Transaction [Line Items]
Related party transaction expenses			$ 1,105
Related party transaction agreement date			Oct. 1, 2014
Related party transaction agreement term			2 years
Number of renewal options | Option			2
Related party transaction agreement renewal term			2 years
Common Stock [Member] | Chad Steelberg and Ryan Steelberg [Member]
Related Party Transaction [Line Items]
Stock issued | shares	961,835	961,835
Shares issued, Price per share | $ / shares	$ 1.50	$ 1.50