Marin Software (MRIN) 10-Q 2 Aug 21 2021 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Jul. 23, 2021
Cover [Abstract]
Entity Registrant Name	MARIN SOFTWARE INC
Entity Central Index Key	0001389002
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		15,466,680
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity File Number	001-35838
Entity Tax Identification Number	20-4647180
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	123 Mission Street
Entity Address, Address Line Two	27th Floor
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94105
City Area Code	415
Local Phone Number	399-2580
Title of 12(b) Security	Common Stock, $0.001 Par Value Per Share
Trading Symbol	MRIN
Security Exchange Name	NASDAQ

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	[1]
Current assets:
Cash and cash equivalents	$ 13,946	$ 14,280
Restricted cash	431	540
Accounts receivable, net	4,378	5,063
Prepaid expenses and other current assets	2,244	3,039
Total current assets	20,999	22,922
Property and equipment, net	4,441	5,477
Right-of-use assets, operating leases	4,145	7,737
Other non-current assets	690	873
Total assets	30,275	37,009
Current liabilities:
Accounts payable	600	928
Accrued expenses and other current liabilities	5,346	6,552
Note payable, current	1,854	1,854
Operating lease liabilities	4,505	6,800
Total current liabilities	12,305	16,134
Note payable, net of current	1,466	1,466
Operating lease liabilities, non-current	265	1,814
Other long-term liabilities	1,562	1,780
Total liabilities	15,598	21,194
Commitments and contingencies (Note 13)
Stockholders’ equity:
Common stock, $0.001 par value - 142,857 shares authorized, 11,147 and 9,743 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	11	10
Additional paid-in capital	311,675	308,065
Accumulated deficit	(295,876)	(291,163)
Accumulated other comprehensive loss	(1,133)	(1,097)
Total stockholders’ equity	14,677	15,815
Total liabilities and stockholders’ equity	$ 30,275	$ 37,009
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares shares in Thousands	Jun. 30, 2021	Dec. 31, 2020	[1]
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	142,857	142,857
Common stock, issued (in shares)	11,147	9,743
Common stock, outstanding (in shares)	11,147	9,743
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenues, net	$ 6,094	$ 7,275	$ 12,402	$ 15,935
Cost of revenues	3,175	4,585	6,416	9,930
Gross profit	2,919	2,690	5,986	6,005
Operating expenses
Sales and marketing	1,268	1,880	2,514	4,192
Research and development	2,667	3,338	5,066	6,775
General and administrative	1,995	2,011	3,864	3,992
Total operating expenses	5,930	7,229	11,444	14,959
Loss from operations	(3,011)	(4,539)	(5,458)	(8,954)
Other income, net	221	537	548	1,006
Loss before benefit from income taxes	(2,790)	(4,002)	(4,910)	(7,948)
Benefit from income taxes	(289)	(521)	(197)	(496)
Net loss	(2,501)	(3,481)	(4,713)	(7,452)
Foreign currency translation adjustments	15	5	(36)	88
Comprehensive loss	$ (2,486)	$ (3,476)	$ (4,749)	$ (7,364)
Net loss per share available to common stockholders, basic and diluted (Note 11)	$ (0.23)	$ (0.50)	$ (0.44)	$ (1.09)
Weighted-average shares used to compute net loss per share available to common stockholders, basic and diluted	11,034	6,912	10,669	6,866

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total		Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balances at beginning of period at Dec. 31, 2019	$ 21,060		$ 7	$ 299,263	$ (277,112)	$ (1,098)
Balances at beginning of period (in shares) at Dec. 31, 2019			6,810
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from vesting of restricted stock units	0		$ 0	0	0	0
Issuance of common stock from vesting of restricted stock units (in shares)			138
Tax withholding related to vesting of restricted stock units	(151)		$ 0	(151)	0	0
Issuance of common stock under employee stock purchase plan	14		$ 0	14	0	0
Issuance of common stock under employee stock purchase plan (in shares)			11
Stock-based compensation expense	1,013		$ 0	1,013	0	0
Net loss	(7,452)		0	0	(7,452)	0
Foreign currency translation adjustments	88		0	0	0	88
Balances at end of period at Jun. 30, 2020	14,572		$ 7	300,139	(284,564)	(1,010)
Balances at end of period (in shares) at Jun. 30, 2020			6,959
Balances at beginning of period at Dec. 31, 2019	21,060		$ 7	299,263	(277,112)	(1,098)
Balances at beginning of period (in shares) at Dec. 31, 2019			6,810
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(14,051)
Balances at end of period at Dec. 31, 2020	15,815	[1]	$ 10	308,065	(291,163)	(1,097)
Balances at end of period (in shares) at Dec. 31, 2020			9,743
Balances at beginning of period at Mar. 31, 2020	17,598		$ 7	299,689	(281,083)	(1,015)
Balances at beginning of period (in shares) at Mar. 31, 2020			6,830
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from vesting of restricted stock units	0		$ 0	0	0	0
Issuance of common stock from vesting of restricted stock units (in shares)			118
Tax withholding related to vesting of restricted stock units	(131)		$ 0	(131)	0	0
Issuance of common stock under employee stock purchase plan	14		$ 0	14	0	0
Issuance of common stock under employee stock purchase plan (in shares)			11
Stock-based compensation expense	567		$ 0	567	0	0
Net loss	(3,481)		0	0	(3,481)	0
Foreign currency translation adjustments	5		0	0	0	5
Balances at end of period at Jun. 30, 2020	14,572		$ 7	300,139	(284,564)	(1,010)
Balances at end of period (in shares) at Jun. 30, 2020			6,959
Balances at beginning of period at Dec. 31, 2020	15,815	[1]	$ 10	308,065	(291,163)	(1,097)
Balances at beginning of period (in shares) at Dec. 31, 2020			9,743
Balances at end of period at Mar. 31, 2021	16,830		$ 11	311,342	(293,375)	(1,148)
Balances at end of period (in shares) at Mar. 31, 2021			10,941
Balances at beginning of period at Dec. 31, 2020	15,815	[1]	$ 10	308,065	(291,163)	(1,097)
Balances at beginning of period (in shares) at Dec. 31, 2020			9,743
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock through equity distribution agreement, net of offering costs	3,025		$ 1	3,024	0	0
Issuance of common stock through equity distribution agreement, net of offering costs (in shares)			1,186
Issuance of common stock from vesting of restricted stock units	0		$ 0	0	0	0
Issuance of common stock from vesting of restricted stock units (in shares)			205
Tax withholding related to vesting of restricted stock units	(111)		$ 0	(111)	0	0
Issuance of common stock under employee stock purchase plan	16		$ 0	16	0	0
Issuance of common stock under employee stock purchase plan (in shares)			13
Stock-based compensation expense	681		$ 0	681	0	0
Net loss	(4,713)		0	0	(4,713)	0
Foreign currency translation adjustments	(36)		0	0	0	(36)
Balances at end of period at Jun. 30, 2021	14,677		$ 11	311,675	(295,876)	(1,133)
Balances at end of period (in shares) at Jun. 30, 2021			11,147
Balances at beginning of period at Mar. 31, 2021	16,830		$ 11	311,342	(293,375)	(1,148)
Balances at beginning of period (in shares) at Mar. 31, 2021			10,941
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from vesting of restricted stock units	0		$ 0	0	0	0
Issuance of common stock from vesting of restricted stock units (in shares)			193
Tax withholding related to vesting of restricted stock units	(88)		$ 0	(88)	0	0
Issuance of common stock under employee stock purchase plan	16		$ 0	16	0	0
Issuance of common stock under employee stock purchase plan (in shares)			13
Stock-based compensation expense	405		$ 0	405	0	0
Net loss	(2,501)		0	0	(2,501)	0
Foreign currency translation adjustments	15		0	0	0	15
Balances at end of period at Jun. 30, 2021	$ 14,677		$ 11	$ 311,675	$ (295,876)	$ (1,133)
Balances at end of period (in shares) at Jun. 30, 2021			11,147
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (Unaudited) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)
Statement Of Stockholders Equity [Abstract]
Offering costs	$ 157

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities:
Net loss	$ (4,713)	$ (7,452)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	463	1,295
Amortization of internally developed software	1,220	1,682
Amortization of intangible assets	0	95
Amortization of deferred costs to obtain and fulfill contracts	268	493
Interest expense	6	5
Loss on disposals of property and equipment and right-of-use assets	32	1
Unrealized foreign currency losses	32	11
Stock-based compensation related to equity awards	641	1,013
Provision for bad debts	(51)	(146)
Net change in operating leases	(252)	(220)
Changes in operating assets and liabilities
Accounts receivable	724	3,113
Prepaid expenses and other assets	607	831
Accounts payable	(330)	(520)
Accrued expenses and other liabilities	(1,424)	(2,327)
Net cash used in operating activities	(2,777)	(2,126)
Investing activities:
Purchases of property and equipment	(6)	(2)
Capitalization of internally developed software	(632)	(958)
Net cash used in investing activities	(638)	(960)
Financing activities:
Proceeds from issuance of common shares through at-the-market offering, net of offering costs	3,120	0
Proceeds from note payable	0	3,320
Payment of principal on finance lease liabilities	(15)	(376)
Employee taxes paid for withheld shares upon equity award settlement	(120)	(200)
Proceeds from employee stock purchase plan, net	15	9
Net cash provided by financing activities	3,000	2,753
Effect of foreign exchange rate changes on cash and cash equivalents and restricted cash	(28)	(2)
Net decrease in cash and cash equivalents and restricted cash	(443)	(335)
Cash and cash equivalents and restricted cash:
Beginning of period	14,820	12,105
End of the period	14,377	11,770
Supplemental disclosures of non-cash investing and financing activities:
Issuance of common stock under employee stock purchase plan	16	14
Amortization of prepaid stock issuance costs	$ 95	$ 0

Summary of Business and Signifi

Summary of Business and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Summary of Business and Significant Accounting Policies	1. Summary of Business and Significant Accounting Policies Marin Software Incorporated (the “Company”) was incorporated in Delaware in March 2006. The Company provides enterprise marketing software for advertisers and agencies to integrate, align and amplify their digital advertising spend across the web and mobile devices. Offered as a unified software-as-a-service (“SaaS”) advertising management solution for search, social and eCommerce advertising, the Company’s platform helps digital marketers convert precise audiences, improve financial performance and make better decisions. The Company’s corporate headquarters are located in San Francisco, California, and the Company has additional offices in the following locations: Austin, Dublin, London, New York and Shanghai. Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements and condensed footnotes have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles (“GAAP”) for complete financial statements. In the opinion of management, all adjustments, consisting of only normal recurring items, considered necessary for fair statement have been included. The results of operations for the three and six months ended June 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021, or for other interim periods or future years. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated balance sheet as of December 31, 2020 is derived from audited financial statements as of that date but does not include all of the information and footnotes required by GAAP for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, filed with the SEC on February 26, 2021. The World Health Organization declared in March 2020 that the outbreak of the coronavirus disease named COVID-19 constituted a pandemic. The COVID-19 pandemic has created, and the lingering effects of the pandemic may continue to create, significant uncertainty in global financial markets, which may decrease technology spending, has depressed and may continue to depress demand for the Company’s platform and has harmed and may continue to harm the Company’s business and results of operations. As of the date of issuance of these condensed consolidated financial statements, the extent to which the lingering effects of the COVID-19 pandemic may impact the Company’s financial condition, liquidity, or results of operations is uncertain. The Company has incurred significant losses in each fiscal year since its incorporation in 2006. The Company incurred a net loss of $4,713 for the six months ended June 30, 2021 and a net loss of $14,051 for the year ended December 31, 2020. As of June 30, 2021, the Company had an accumulated deficit of $295,876. The Company had cash, cash equivalents and restricted cash of $14,377 as of June 30, 2021. Management expects to incur additional losses and experience negative operating cash flows in the future. The Company is not aware of any specific event or circumstance that would require it to update its estimates, judgments or revise the carrying value of its assets or liabilities. These estimates may change, as new events occur and additional information is obtained, and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the Company’s financial statements. Fair Value of Financial Instruments The Company’s financial instruments, including accounts receivable, accounts payable and accrued expenses are carried at cost, which approximates fair value because of the short-term nature of those instruments. Based on borrowing rates available to the Company for loans with similar terms and maturities and in consideration of the Company’s credit risk profile, the carrying value of outstanding lease liabilities approximates fair value as well. The Company’s note payable approximates fair value primarily due to its relatively short-term nature and lack of significant change in interest rates since it was funded. Allowances for Doubtful Accounts and Revenue Credits The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the Company’s receivables portfolio based on historical experience, specific allowances for known troubled accounts and other available information. The Company does not require collateral from its customers, and it performs a regular review of its customers’ payment histories and associated credit risks. Certain contracts with advertising agencies contain sequential liability provisions, whereby the agency does not have an obligation to pay the Company until payment is received from the agency’s customers. In these circumstances, the Company evaluates the credit worthiness of the agency’s customers in addition to the agency itself. As of June 30, 2021 and December 31, 2020, the Company recorded an allowance for doubtful accounts of $1,179 and $1,236, respectively. From time to time, the Company provides credits to customers that typically relate to customer disputes or billing adjustments and are recorded as a reduction of revenue. Reserves for these revenue credits are accounted for as variable consideration under authoritative revenue recognition guidance (see Note 2) and are estimated based on historical credit activity. As of June 30, 2021, and December 31, 2020, the Company recorded an allowance for potential customer credits in the amount of $395 and $437, respectively. Long-Lived Assets Impairment Assessment The Company evaluates long-lived assets, excluding goodwill, for potential impairment whenever adverse events or changes in circumstances or business climate indicate that the expected undiscounted future cash flows related to such long-lived assets may not be sufficient to support the net book value of such assets. An impairment loss is recognized only if the carrying value of a long-lived asset or asset group is not recoverable and exceeds its fair value. The carrying value of a long-lived asset or asset group is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset. There were no such impairment losses recorded in any of the periods presented. Revenue Recognition The Company generates revenues principally from subscriptions either directly with advertisers or with advertising agencies to its platform for the management of search, social and eCommerce. The Company also generates revenues from strategic agreements with certain leading publishers. Under the subscription agreements, the Company receives consideration based on the advertising spend that customers manage on its platform. Revenues are recognized when control of these services is transferred to the Company’s customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services. See Note 2 for further discussion of the Company’s revenues. Recent Accounting Pronouncement Adopted in 2021 In August 2018, the Financial Accounting Standards Board, (“FASB”), issued Accounting Standards Update, (“ASU”) 2019-12, Income Taxes – Simplifying the Accounting for Income Taxes Recent Accounting Pronouncement Not Yet Effective In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses – Measurement of Credit Losses on Financial Instruments

Revenues

Revenues	6 Months Ended
	Jun. 30, 2021
Revenue From Contract With Customer [Abstract]
Revenues	2. Revenue Recognition The Company generates its revenues principally from subscriptions, either directly with advertisers or with advertising agencies, to its platform for the management of search, social, eCommerce and display advertising. It also generates a portion of its revenues from long-term strategic agreements with certain leading publishers. Revenues are recognized when control of these services is transferred to the Company’s customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services. The Company determines revenue recognition through the following steps: • Identification of the contract, or contracts, with a customer; • Identification of the performance obligations in the contract; • Determination of the transaction price; • Allocation of the transaction price to the performance obligations in the contract; and • Recognition of revenue when, or as, the Company satisfies its performance obligations. Subscription The Company’s subscription contracts provide advertisers with access to the Company’s advertising management platform. Advertisers do not have the right to take possession of the software supporting the services at any time. These contracts are generally one year or less in length, though certain contracts extend up to two years. The subscription fee under most contracts consists of the greater of a minimum monthly platform fee or variable consideration based on the volume of advertising spend managed through the Company’s platform at the contractual percentage of spend. The variable portion generally includes tiered pricing, whereby the percentage of spend charged decreases as the value of advertising spend increases. The tiered pricing resets monthly and is consistent throughout the contract term. The Company has concluded that this volume-based pricing approach does not constitute a future material right as the pricing tiers are consistent throughout the term of the contract and similar pricing is typically offered to similar classes of customers within the same geographical areas and markets. Certain subscription contracts consist of only a flat monthly platform fee. Subscription fees are generally invoiced on a monthly basis in arrears based on the actual amount of advertising spend managed on the platform. In certain limited circumstances, the Company will invoice an advertiser in advance for the contractual minimum monthly platform fee for a defined future period, which is typically three to 12 months. The Company’s subscription services comprise a single stand-ready performance obligation satisfied over time as the advertiser simultaneously receives and consumes the benefit from the Company’s performance. This performance obligation constitutes a series of services that are substantially the same in nature and are provided over time using the same measure of progress. Revenues derived from these arrangements are recognized over time using an output method based upon the passage of time as this provides a faithful depiction of the pattern of transfer of control. Fixed minimum monthly platform fees are recognized ratably over the contract term as the single performance obligation is satisfied. Variable fees are allocated to the distinct month of the series in which they are earned because the terms of the variable payments relate specifically to the outcome from transferring the distinct time increment (month) of service and because such amounts reflect the fees to which the Company expects to be entitled for providing access to the advertising management platform for that period, consistent with the allocation objective of authoritative revenue guidance under Accounting Standards Codification 606 (“ASC 606”). Expected future revenues for subscription services related to performance obligations that are unsatisfied (or partially unsatisfied) as of June 30, 2021 were as follows: Subscription Services Revenues 2021 (remaining six months) $ 1,187 2022 807 2023 40 Total $ 2,034 The Company applies the optional exemption under ASC 606 and does not disclose the value of unsatisfied performance obligations on subscription contracts with an original term of one year or less. The amounts disclosed above as remaining performance obligations consist primarily of fixed or monthly minimum fees under contracts with an original expected duration of greater than one year. The amounts exclude estimates of variable consideration such as volume-based contracts, as well as anticipated renewals of contracts. Strategic Agreements The Company has entered into long-term strategic agreements with certain leading search publishers. Under these strategic agreements, the Company receives consideration based on a percentage of the search advertising spend that its customers manage on its platform. These strategic agreements are generally billed on a quarterly basis. The majority of the Company’s strategic agreement revenue is concentrated in one revenue share agreement, executed with Google in December 2018, with an effective date of October 1, 2018 (the “Google Revenue Share Agreement”). Under the Google Revenue Share Agreement, which constitutes a single performance obligation, the Company receives both fixed and variable revenue share payments based on a percentage of the search advertising spend that is managed through the Company’s platform. The Google Revenue Share Agreement requires the Company to reinvest a specified percentage of these revenue share payments in its search technology platform to drive innovation. The performance obligation is expected to be satisfied ratably over the two-year contractual term using the output method based upon the passage of time, as Google simultaneously receives and consumes the benefit from the Company’s performance, which provides a faithful depiction of the pattern of transfer of control. The Google Revenue Share Agreement has a three-year two-year The Company evaluates the total amount of variable revenue share payments expected to be earned from the Google Revenue Share Agreement using the expected value method, as it believes this method represents the most appropriate estimate for this consideration, based on historical service trends, the individual contract considerations and the Company’s best judgment. The Company includes estimates of variable consideration in revenues only to the extent that it believes it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. The Company recognized revenues from the Google Revenue Share Agreement of $2,283 for each of the three months ended June 30, 2021 and 2020 and $4,566 Disaggregation of Revenues Revenues by geographic area, based on the billing location of the customer, were as follows for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 United States of America $ 4,687 $ 5,527 $ 9,453 $ 12,082 United Kingdom 758 904 1,638 1,904 Other (1) 649 844 1,311 1,949 Total revenues, net $ 6,094 $ 7,275 $ 12,402 $ 15,935 (1) No individual country within the “Other” category accounted for 10% or more of revenues for any period presented. Revenues by nature of services performed were as follows for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Subscriptions $ 3,754 $ 4,938 $ 7,763 $ 11,271 Strategic agreements 2,340 2,337 4,639 4,664 Total revenues, net $ 6,094 $ 7,275 $ 12,402 $ 15,935 Contract Balances Accounts Receivable, Net The timing of revenue recognition may differ from the timing of invoicing to customers. Accounts receivable are recorded at the invoice amount, net of any allowances for doubtful accounts and revenue credits. A receivable is recognized in the period the Company provides the underlying services or when the right to consideration is unconditional. The balances of accounts receivable, net of the allowances for doubtful accounts and revenue credits, as of June 30, 2021 and December 31, 2020 are presented in the accompanying condensed consolidated balance sheets. Included in the balance of accounts receivable, net as of June 30, 2021 and December 31, 2020 was $1,725 related to the Google Revenue Share Agreement, which represented 39% and 34%, respectively, of accounts receivable, net. Customer Advances In certain situations, the Company receives cash payments from customers in advance of its performance of the underlying services. These advances from customers are included within accrued expenses and other current liabilities on the accompanying condensed consolidated balance sheets. Deferred Strategic Agreement Revenues Due to the timing of revenue recognition under the Google Revenue Share Agreement, the contractual billings exceed revenue recognized to date, resulting in a contract liability. As of June 30, 2021 and December 31, 2020, the Company recorded deferred strategic agreement revenues of $558 and $1,657, respectively, within accrued expenses and other current liabilities on the accompanying condensed consolidated balance sheets. Costs to Obtain and Fulfill Contracts The Company capitalizes certain contract acquisition costs, consisting primarily of commissions and related payroll taxes, when customer contracts are signed. The Company also capitalizes certain contract fulfillment costs, consisting primarily of the portion of the payroll and fringe benefits of the Company’s professional services team that relates directly to performing on-boarding and integration services for new and existing customers (collectively, “deferred costs to obtain and fulfill contracts”). The deferred costs to obtain and fulfill contracts are amortized over the expected period of benefit, which the Company has determined to be approximately 30 months. This expected period of benefit takes into consideration the duration of the Company’s customer contracts, historical contract renewal rates, the underlying technology and other factors. Amortization expense for deferred costs to obtain and fulfill contracts is included in sales and marketing expense and cost of sales, respectively, on the accompanying condensed consolidated statements of comprehensive loss. The Company classifies deferred costs to obtain and fulfill contracts as current or non-current based on the timing of when the related amortization expense is expected to be recognized. The current portion of these deferred costs is included in prepaid expenses and other current assets, while the non-current portion is included in other non-current assets on the accompanying condensed consolidated balance sheets. Changes in the balances of deferred costs to obtain and fulfill contracts during the six months ended June 30, 2021 were as follows: Deferred Costs to Obtain Contracts Deferred Costs to Fulfill Contracts Balances at December 31, 2020 $ 283 $ 197 Costs deferred 133 60 Amortization (183 ) (85 ) Balances at June 30, 2021 $ 233 $ 172

Balance Sheet Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2021
Balance Sheet Components [Abstract]
Balance Sheet Components	3. The following table shows the components of property and equipment as of the dates presented: June 30, December 31, Estimated Useful Life 2021 2020 Software, including internally developed software 3 years $ 30,515 $ 29,843 Computer equipment 3 to 4 years 16,189 21,400 Finance lease right-of-use assets Shorter of useful life or lease term 3,714 5,067 Leasehold improvements Shorter of useful life or lease term 4,138 4,181 Office equipment, furniture and fixtures 3 to 5 years 1,677 1,671 Total property and equipment 56,233 62,162 Less: Accumulated depreciation and amortization (51,792 ) (56,685 ) Property and equipment, net $ 4,441 $ 5,477 Finance lease right-of-use assets consist of computer equipment. Amortization of internally developed software and depreciation for the six months ended June 30, 2021 and 2020 was $1,683 and $2,977, respectively. The following table shows the components of accrued expenses and other current liabilities as of the dates presented: June 30, December 31, 2021 2020 Accrued salary and payroll-related expenses $ 2,038 $ 2,309 Deferred strategic agreement revenues 558 1,657 Accrued liabilities 659 848 Finance lease liabilities - 15 Advanced billings 348 404 Other 1,743 1,319 Total accrued expenses and other current liabilities $ 5,346 $ 6,552

Borrowing

Borrowing	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Borrowing	4. Borrowing On April 23, 2020, the Company entered into an original loan agreement with Harvest Small Business Finance, LLC as the lender (“Lender”) for a loan in an aggregate principal amount of $3,320 (the “Loan”) pursuant to the Paycheck Protection Program (the “PPP”) under the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) and implemented by the U.S. Small Business Administration (the “SBA”). The Loan was originally evidenced by a Note dated effective as of April 22, 2020, but such Note was replaced by a Note with substantially the same terms, but with an updated effective date of May 5, 2020 to account for a delay in disbursement of funds. The Loan matures two years from the date of first disbursement of the Loan, which occurred on May 7, 2020. The Company received the loan proceeds on May 12, 2020. The Loan bears interest at a rate of 1% per annum. Initially, all payments were deferred through the ten-month anniversary of the date of the Note. The Paycheck Protection Flexibility Act of 2020, P.L. 116-142, extended the deferral period for loan payment to the date that SBA remits the borrower’s loan forgiveness amount to the Lender. The PPP provides that borrowers may apply for forgiveness of amounts due under the Loan, with the amount of potential Loan forgiveness to be calculated based on payroll costs, any mortgage interest payments, any covered rent payments and any covered utilities payments during the 10-week period beginning on the date of first disbursement of the Loan. The Company has applied for forgiveness of the entire balance of $3,320 due under the Loan, but no assurances can be provided as to the amount or timing of any potential Loan forgiveness.

Restructuring Activities

Restructuring Activities	6 Months Ended
	Jun. 30, 2021
Restructuring And Related Activities [Abstract]
Restructuring Activities	5. Restructuring Activities 2020 Restructuring Plan During the three months ended September 30, 2020, the Company commenced the implementation of a restructuring and reduction-in- force plan to reduce the Company’s operating costs and address the impact of the COVID-19 pandemic. The plan included the reduction of the Company’s global workforce by approximately 60 employees, approximately half of which were located outside of the United States. The planned workforce reductions were substantially completed during 2020. During the three and six months ended June 30, 2021, the Company recorded $3 of restructuring-related expenses in connection with the 2020 Restructuring Plan in the accompanying condensed consolidated statements of comprehensive loss. During the three and six months ended June 30, 2020, the Company recorded $43 of restructuring-related expenses in connection with other organizational restructuring plans, in the accompanying condensed consolidated statements of comprehensive loss.

Shelf Registration and At-the-M

Shelf Registration and At-the-Market Offering	6 Months Ended
	Jun. 30, 2021
Shelf Registration And At The Market Offering [Abstract]
Shelf Registration and At-the-Market Offering	6. On March 14, 2019, the Company filed a shelf registration statement on Form S-3 with the SEC, which was declared effective by the SEC on May 10, 2019 (the “Initial Registration Statement”) and enabled the Company to offer its common stock, preferred stock, debt securities, warrants, subscription rights and units having an aggregate offering price of up to $50,000. As part of this shelf registration, the Company entered into an equity distribution agreement with JMP Securities LLC, or JMP Securities (the “2019 equity distribution agreement”), pursuant to which the Company could offer and sell shares of its common stock having an aggregate offering price of up to $13,000 through an at-the-market offering program administered by JMP Securities. JMP Securities was entitled to compensation of up to 5.0% of the gross proceeds from sales of the Company’s common stock pursuant to the equity distribution agreement. During the three months ended March 31, 2021 the Company sold 1,186 shares of its common stock under the 2019 equity distribution agreement and received proceeds of $3,025, net of offering costs of $157 at a weighted average sales price of $2.68 per share, which resulted in the Company exhausting the amounts available for sale under the 2019 equity distribution agreement. During the six months ended June 30, 2020, the Company sold no shares of its common stock under this 2019 equity distribution agreement. During the period from inception of the 2019 equity distribution agreement, the Company sold 4,570 shares of its common stock under the 2019 equity distribution agreement and received proceeds of $12,288, net of offering costs of $712 at a weighted average sales price of $2.84 per share. On July 15, 2021, the Company increased the size of the remaining $ 37,000 available on the Initial Registration Statement by an additional $ 3,000 allowing it to offer securities with an aggregate gross sales price of up to $ 40,000 . The Company also entered into a new equity distribution agreement with JMP Securities (the “2021 equity distribution agreement”) under which it could sell shares of its common stock up to a gross aggregate sales price of $ 40,000 through an at-the-market offering program administered by JMP Securities . JMP Securities was entitled to fees of 3 % of the gross proceeds from sales of the Company’s common stock under this 2021 equity distribution agreement. In July 2021 the Company sold shares of its common stock under the 2021 equity distribution agreement and received proceeds of $ , net of $ in fees to JMP Securities , at a weighted average sales price of $ 9.27 per share , which resulted in the Company exhausting the amounts available for sale under the 2021 equity distribution agreement.

Equity Award Plans

Equity Award Plans	6 Months Ended
	Jun. 30, 2021
Equity Award Plans [Abstract]
Equity Award Plans	7. In April 2006, the Company’s Board of Directors (the “Board”) adopted and the stockholders approved the 2006 Stock Option Plan (“2006 Plan”), which provided for the grant of incentive and non-statutory stock options. In February 2013 the Board adopted and the stockholders approved the 2013 Equity Incentive Plan (“2013 Plan”), which became effective on March 21, 2013. At that time, the Company ceased to grant equity awards under the 2006 Plan. Under the 2013 Plan, 643 shares of common stock were originally reserved for issuance. Additionally, all reserved and unissued shares under the 2006 Plan are eligible for issuance under the 2013 Plan. The 2013 Plan authorizes the award of incentive and non-statutory stock options, restricted stock awards, stock appreciation rights, restricted stock units (“RSUs”), performance awards and stock bonuses to the Company’s employees, directors, consultants, independent contractors and advisors. On January 1 of each calendar year through 2023, the number of shares of common stock reserved under the 2013 Plan will automatically increase by an amount equal to 5% of the total outstanding shares as of the immediately preceding December 31, or such lesser number of shares as determined by the Board. Pursuant to terms of the 2013 Plan, the shares available for issuance increased by 487 shares of common stock on January 1, 2021. As of June 30, 2021, 1,488 shares of common stock were available for future grants under the 2013 Plan. Stock Options A summary of stock option activity under the 2006 Plan and the 2013 Plan is as follows: Options Outstanding Number of Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Balances at December 31, 2020 389 $ 23.57 5.77 $ — Options forfeited and cancelled (3 ) 35.68 — — Balances at June 30, 2021 386 23.45 5.32 1,020 Options exercisable 356 25.09 5.10 818 Options vested 356 25.09 5.10 818 Options vested and expected to vest 382 23.65 5.29 993 RSUs A summary of RSU activity under the 2013 Plan is as follows: RSUs Outstanding Number of Shares Weighted Average Grant Date Fair Value Per Unit Granted and unvested at December 31, 2020 1,006 $ 2.80 RSUs granted 181 1.62 RSUs vested (205 ) 3.10 RSUs cancelled and withheld to cover taxes (96 ) 4.52 Granted and unvested at June 30, 2021 886 $ 2.31 Employee Stock Purchase Plan In February 2013, the Board and stockholders approved the 2013 Employee Stock Purchase Plan (“2013 ESPP”), under which 143 shares of common stock were originally reserved for issuance. The 2013 ESPP became effective on March 22, 2013. The 2013 ESPP generally provides for six-month purchase periods ending in May and November and the purchase price for shares of common stock purchased under the 2013 ESPP is 85% of the lesser of the fair market value of the common stock on (1) the first trading day of the applicable offering period and (2) the last trading day of each purchase period in the applicable offering period. On January 1 of each calendar year following the first offering date, the number of shares reserved under the 2013 ESPP automatically increases by an amount equal to 1% of the total outstanding shares as of immediately preceding December 31, but not to exceed 100 shares. Pursuant to terms of the 2013 ESPP, the shares available for issuance increased by 97 shares on January 1, 2021. As of June 30, 2021, 269 shares were reserved for issuance under the 2013 ESPP. During the three and six months ended June 30, 2021 and 2020, 13 and 11 shares, respectively, were issued under the 2013 ESPP.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	8. Stock-Based Compensation Stock-based compensation expense was allocated as follows during the three and six months ended June 30, 2021 and 2020: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Cost of revenues $ 46 $ 129 $ 81 $ 223 Sales and marketing 70 149 136 259 Research and development 133 217 231 384 General and administrative 130 72 193 147 Total $ 379 $ 567 $ 641 $ 1,013 For stock-based awards granted by the Company, stock-based compensation cost is measured at grant date based on the fair value of the award and is expensed over the requisite service period. Stock-based compensation capitalized as internally developed software was $26 and $40 for the three and six months ended June 30, 2021, respectively. Stock Options The Company uses the Black-Scholes option-pricing model to estimate the fair value of options. This model requires the input of highly subjective assumptions including the expected volatility, risk-free interest rate and the expected life of options. There were no stock options granted during the three and six months ended June 30, 2021. The Company estimates the expected volatility of its common stock and expected life of its stock options based on its own historical experience. The expected volatility reflects the actual historical volatility of the price of the Company’s common stock since it began trading publicly in March 2013. The expected life represents the period of time that stock options are expected to be outstanding, based on historical exercise and employee departure behavior. The Company has no history or expectation of paying cash dividends on its common stock. The risk-free interest rate is based on the U.S. Treasury yield for a term consistent with the expected life of the options in effect at the time of grant. There were no exercises of stock options during the three and six months ended June 30, 2021 and 2020. Compensation expense, net of estimated forfeitures, is recognized ratably over the requisite service period. As of June 30, 2021, there was $90 of unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted-average period of 1.1 years. RSUs As of June 30, 2021, there was $1,553 of unrecognized compensation expense, net of estimated forfeitures, related to RSUs, which is expected to be recognized over a weighted-average period of 2.0 years. The Company uses the fair market value of the underlying common stock on the dates of grant to determine the fair value of RSUs. Employee Stock Purchase Plan The Company estimates the fair value of purchase rights under the 2013 ESPP using the Black-Scholes valuation model. The fair value of each purchase right under the 2013 ESPP is estimated on the date of grant using the Black-Scholes option valuation model and the straight-line attribution approach with assumptions substantially similar to those used for the valuation of stock option awards, with the exception of the expected life. The expected life is estimated to be six months, which is consistent with the purchase periods under the 2013 ESPP.

Leases

Leases	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	9. Operating and Finance Leases The Company evaluates new contractual arrangements at inception to determine if the contract is or contains a lease. For any contracts that are or contain a lease, the Company determines the appropriate classification of each identified lease as operating or finance. For all identified leases, the Company records the related lease liabilities and ROU assets based on the future minimum lease payments over the lease term, which only includes options to renew the lease if it is reasonably certain that the Company will exercise that option. For leases with original terms of twelve months or less, the Company recognizes the lease expense as incurred and does not recognize lease liabilities and ROU assets. The Company has operating leases for corporate offices worldwide and for space at a data center. Lease liabilities are measured based on the future minimum lease payments discounted over the lease term. The Company uses the discount rate implicit in the lease whenever that rate is readily determinable. For leases where no such rate is determinable, the Company uses its incremental borrowing rate, or the rate of interest that Company would have to pay to borrow an amount equal to the lease payments, on a collateralized basis over a similar term and in a similar economic environment. As of June 30, 2021, the weighted-average rate used in discounting the lease liabilities for ROU operating leases was 6.5%. Current and non-current operating lease liabilities are presented on the condensed consolidated balance sheet. ROU assets are measured based on the associated lease liabilities, adjusted for any lease incentives such as tenant improvement allowances. ROU assets for operating leases are presented as non-current assets on the condensed consolidated balance sheets, while ROU assets for finance leases are included within property and equipment, net. The Company recognizes the expense for operating leases on straight-line basis over the lease term. As of June 30, 2021, the weighted-average remaining lease term for ROU operating leases was 0.9 years. As of June 30, 2021, the Company had net operating lease ROU assets of $4,145. Operating lease costs, consisting primarily of rental expense, were approximately $1,505 and $1,829, for the three months ended June 30, 2021 and 2020, respectively and $3,239 and $3,760 for the six months ended June 30, 2021 and 2020, respectively. Variable rent expense was not significant for the three and six months ended June 30, 2021 and 2020. At various dates between August 2015 and October 2016, the Company entered into finance lease arrangements for computer equipment, all of which had expired by June 30, 2021. Finance lease costs for the three and six months ended June 30, 2021 consisted of $42 and $95, respectively, in depreciation of the leased assets. Finance lease costs for the three and six months ended June 30, 2020 consisted of $162 and $332, respectively, in depreciation of the leased assets. Finance lease interest expense was not significant in either the 2021 or 2020 periods. The maturities of operating lease liabilities as June 30, 2021 are as follows: 2021 (remaining six months) $ 3,067 2022 1,832 Total lease payments 4,899 Less: Amount representing imputed interest (129 ) Present value of lease liabilities 4,770 Less: Current portion of lease liabilities (4,505 ) Non-current portion of lease liabilities $ 265 Supplemental cash flow information related to operating leases was as follows: Six Months Ended Six Months Ended June 30, 2021 June 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows from finance leases $ 15 $ 376 Operating cash flows from finance leases — 14 Operating cash flows from operating leases 3,689 4,005 ROU assets obtained in exchange for lease liabilities: Finance lease liabilities $ — $ — Operating lease liabilities — 6,576 Subleases The Company subleases portions of its San Francisco office space under an agreement that expires in July 2022. Income from subleases is included in other income, net, on the accompanying condensed consolidated statements of comprehensive loss. Sublease income was $271 and $558 for the three months ended June 30, 2021 and 2020, respectively, and $542 and $1,128 for the six months ended June 30, 2021 and 2020. Future minimum amounts due under subleases as of June 30, 2021 were as follows: Operating Sublease Income 2021 (remaining six months) $ 553 2022 616 Total amounts due under subleases $ 1,169

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	10. Income Taxes The Company’s quarterly provision for income taxes is based on an estimated effective annual income tax rate, and it also includes the tax impact of certain unusual or infrequently occurring items, if any. These may include changes in judgment about valuation allowances and effects of changes in tax laws or rates in the interim period in which they occur. Income tax benefit for the three and six months ended June 30, 2021 was $289 and $197, respectively, on pre-tax losses of $2,790 and $4,910, respectively. As of June 30, 2021the income tax rate varies from the federal income tax rate primarily due to a partial release of foreign uncertain tax positions, benefits of foreign returns filed, valuation allowances in the United States and taxable income generated by the Company's foreign wholly owned subsidiaries. The Company reviews the likelihood that it will realize the benefit of its deferred tax assets and, therefore, the need for valuation allowances on a quarterly basis. There is no income tax benefit recognized with respect to losses incurred and no income tax expense recognized with respect to earnings generated in jurisdictions with a valuation allowance. This causes variability in the Company’s effective tax rate. The Company will maintain the valuation allowances until it is more likely than not that the net deferred tax assets will be realized. The CARES Act enacted on March 27, 2020 did not provide an income tax benefit for the Company given the U.S. losses and the full valuation allowance against its net deferred tax assets. Tax positions taken by the Company are subject to audits by multiple tax jurisdictions. The Company believes that it has provided adequate reserves for its uncertain tax positions for all tax years still open for assessment. The Company also believes that it does not have any tax position for which it is not reasonably possible that the total amounts of uncertain tax positions will significantly increase or decrease within the next year. For the three and six months ended June 30, 2021 and 2020, the Company did not recognize any material interest or penalties related to uncertain tax positions.

Net Loss Per Share Available to

Net Loss Per Share Available to Common Stockholders	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Net Loss Per Share Available to Common Stockholders	11. Basic net loss per share of common stock is calculated by dividing the net loss available to common stockholders by the weighted-average number of shares of common stock outstanding for the period. Diluted net loss per share of common stock is computed by dividing the net loss using the weighted-average number of shares of common stock, excluding common stock subject to repurchase, and, if dilutive, potential shares of common stock outstanding during the period. Basic and diluted net loss per share is the same for all periods presented, as the impact of all potentially outstanding dilutive securities was anti-dilutive. The following table presents the calculation of basic and diluted net loss per share: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Numerator: Net loss available to common stockholders $ (2,501 ) $ (3,481 ) $ (4,713 ) $ (7,452 ) Denominator: Weighted average number of shares, basic and diluted 11,034 6,912 10,669 6,866 Net loss per share available to common stockholders Basic and diluted net loss per common share available to common stockholders $ (0.23 ) $ (0.50 ) $ (0.44 ) $ (1.09 ) The following table presents the potential shares of common stock outstanding that were excluded from the computation of diluted net loss per share available to common stockholders for the periods presented because including them would have been anti-dilutive: Three and Six Months Ended June 30, 2021 2020 Options to purchase common stock 386 435 Unvested RSUs 886 863 Total 1,272 1,298

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segment Reporting	12. The Company defines the term “chief operating decision maker” to be the Chief Executive Officer. The Chief Executive Officer reviews the financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. Accordingly, the Company has determined that it operates as a single

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies Legal Matters From time to time, the Company may be involved in lawsuits, claims, investigations and proceedings, consisting of intellectual property, commercial, employment and other matters, which arise in the ordinary course of business. In accordance with GAAP, the Company records a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and adjusted to reflect the impact of negotiations, settlements, ruling, advice of legal counsel and other information and events pertaining to a particular case. Litigation is inherently unpredictable. If any unfavorable ruling was to occur in any specific period or if a loss becomes probable and estimable, there exists the possibility of a material adverse impact on the Company’s results of operations, financial position or cash flows. As of June 30, 2021, no material amounts are recorded related to legal proceedings on the unaudited condensed consolidated balance sheet. Indemnification The Company enters into standard indemnification agreements in the ordinary course of business. Pursuant to the agreements, each party may indemnify, defend and hold the other party harmless with respect to such claim, suit or proceeding brought against it by a third party alleging that the indemnifying party’s intellectual property infringes upon the intellectual property of the third party, or results from a breach of the indemnifying party’s representations and warranties or covenants, or that results from any acts of negligence or willful misconduct. The term of these indemnification agreements is generally perpetual any time after execution of the agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited. Historically, the Company has not been obligated to make significant payments for these obligations and no liabilities have been recorded on the unaudited condensed consolidated balance sheet as of June 30, 2021 and the audited consolidated balance sheet as of December 31, 2020. The Company also indemnifies its officers and directors for certain events or occurrences, subject to certain limits, while the officer or director is or was serving at the Company’s request in such capacity. The maximum amount of potential future indemnification is unlimited; however, the Company has a directors and officers insurance policy that enables the Company to recover a portion of any future amounts paid. Historically, the Company has not been obligated to make any payments for these obligations and no liabilities have been recorded as of June 30, 2021 and December 31, 20 20 . Other Contingencies The Company is subject to claims and assessments from time to time in the ordinary course of business. The Company’s management does not believe that any such matters, individually or in the aggregate, will have a material adverse effect on the Company’s financial position, results of operations or cash flows.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	14. Subsequent Events On July 15, 2021, the Company entered into a new equity distribution agreement with JMP Securities under which it could sell shares of its common stock up to an aggregate gross sales price of $40,000 through the at-the-market offering program administered by JMP Securities. In July 2021 the Company sold 4,316 shares of its common stock under this new agreement and received proceeds of $38,800, net of $1,200 in fees to JMP Securities, which exhausted all securities available for sale under this agreement. See Note 6 “Shelf Registration and At-the-Market Offering” for additional information.

Summary of Business and Signi_2

Summary of Business and Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements and condensed footnotes have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles (“GAAP”) for complete financial statements. In the opinion of management, all adjustments, consisting of only normal recurring items, considered necessary for fair statement have been included. The results of operations for the three and six months ended June 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021, or for other interim periods or future years. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated balance sheet as of December 31, 2020 is derived from audited financial statements as of that date but does not include all of the information and footnotes required by GAAP for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, filed with the SEC on February 26, 2021. The World Health Organization declared in March 2020 that the outbreak of the coronavirus disease named COVID-19 constituted a pandemic. The COVID-19 pandemic has created, and the lingering effects of the pandemic may continue to create, significant uncertainty in global financial markets, which may decrease technology spending, has depressed and may continue to depress demand for the Company’s platform and has harmed and may continue to harm the Company’s business and results of operations. As of the date of issuance of these condensed consolidated financial statements, the extent to which the lingering effects of the COVID-19 pandemic may impact the Company’s financial condition, liquidity, or results of operations is uncertain. The Company has incurred significant losses in each fiscal year since its incorporation in 2006. The Company incurred a net loss of $4,713 for the six months ended June 30, 2021 and a net loss of $14,051 for the year ended December 31, 2020. As of June 30, 2021, the Company had an accumulated deficit of $295,876. The Company had cash, cash equivalents and restricted cash of $14,377 as of June 30, 2021. Management expects to incur additional losses and experience negative operating cash flows in the future. The Company is not aware of any specific event or circumstance that would require it to update its estimates, judgments or revise the carrying value of its assets or liabilities. These estimates may change, as new events occur and additional information is obtained, and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the Company’s financial statements.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s financial instruments, including accounts receivable, accounts payable and accrued expenses are carried at cost, which approximates fair value because of the short-term nature of those instruments. Based on borrowing rates available to the Company for loans with similar terms and maturities and in consideration of the Company’s credit risk profile, the carrying value of outstanding lease liabilities approximates fair value as well. The Company’s note payable approximates fair value primarily due to its relatively short-term nature and lack of significant change in interest rates since it was funded.
Allowances for Doubtful Accounts and Revenue Credits	Allowances for Doubtful Accounts and Revenue Credits The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the Company’s receivables portfolio based on historical experience, specific allowances for known troubled accounts and other available information. The Company does not require collateral from its customers, and it performs a regular review of its customers’ payment histories and associated credit risks. Certain contracts with advertising agencies contain sequential liability provisions, whereby the agency does not have an obligation to pay the Company until payment is received from the agency’s customers. In these circumstances, the Company evaluates the credit worthiness of the agency’s customers in addition to the agency itself. As of June 30, 2021 and December 31, 2020, the Company recorded an allowance for doubtful accounts of $1,179 and $1,236, respectively. From time to time, the Company provides credits to customers that typically relate to customer disputes or billing adjustments and are recorded as a reduction of revenue. Reserves for these revenue credits are accounted for as variable consideration under authoritative revenue recognition guidance (see Note 2) and are estimated based on historical credit activity. As of June 30, 2021, and December 31, 2020, the Company recorded an allowance for potential customer credits in the amount of $395 and $437, respectively.
Long-Lived Assets Impairment Assessment	Long-Lived Assets Impairment Assessment The Company evaluates long-lived assets, excluding goodwill, for potential impairment whenever adverse events or changes in circumstances or business climate indicate that the expected undiscounted future cash flows related to such long-lived assets may not be sufficient to support the net book value of such assets. An impairment loss is recognized only if the carrying value of a long-lived asset or asset group is not recoverable and exceeds its fair value. The carrying value of a long-lived asset or asset group is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset. There were no such impairment losses recorded in any of the periods presented.
Revenue Recognition	Revenue Recognition The Company generates revenues principally from subscriptions either directly with advertisers or with advertising agencies to its platform for the management of search, social and eCommerce. The Company also generates revenues from strategic agreements with certain leading publishers. Under the subscription agreements, the Company receives consideration based on the advertising spend that customers manage on its platform. Revenues are recognized when control of these services is transferred to the Company’s customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services. See Note 2 for further discussion of the Company’s revenues.
Recent Accounting Pronouncement Adopted in 2021	Recent Accounting Pronouncement Adopted in 2021 In August 2018, the Financial Accounting Standards Board, (“FASB”), issued Accounting Standards Update, (“ASU”) 2019-12, Income Taxes – Simplifying the Accounting for Income Taxes
Recent Accounting Pronouncement Not Yet Effective	Recent Accounting Pronouncement Not Yet Effective In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses – Measurement of Credit Losses on Financial Instruments

Revenues (Tables)

Revenues (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue From Contract With Customer [Abstract]
Expected Future Revenue for Subscription Services Related to Performance Obligations Unsatisfied or Partially Unsatisfied	Expected future revenues for subscription services related to performance obligations that are unsatisfied (or partially unsatisfied) as of June 30, 2021 were as follows: Subscription Services Revenues 2021 (remaining six months) $ 1,187 2022 807 2023 40 Total $ 2,034
Disaggregation of Revenues	Revenues by geographic area, based on the billing location of the customer, were as follows for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 United States of America $ 4,687 $ 5,527 $ 9,453 $ 12,082 United Kingdom 758 904 1,638 1,904 Other (1) 649 844 1,311 1,949 Total revenues, net $ 6,094 $ 7,275 $ 12,402 $ 15,935 (1) No individual country within the “Other” category accounted for 10% or more of revenues for any period presented. Revenues by nature of services performed were as follows for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Subscriptions $ 3,754 $ 4,938 $ 7,763 $ 11,271 Strategic agreements 2,340 2,337 4,639 4,664 Total revenues, net $ 6,094 $ 7,275 $ 12,402 $ 15,935
Changes in Balances of Deferred Costs to Obtain and Fulfill Contracts	Changes in the balances of deferred costs to obtain and fulfill contracts during the six months ended June 30, 2021 were as follows: Deferred Costs to Obtain Contracts Deferred Costs to Fulfill Contracts Balances at December 31, 2020 $ 283 $ 197 Costs deferred 133 60 Amortization (183 ) (85 ) Balances at June 30, 2021 $ 233 $ 172

Balance Sheet Components (Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2021
Balance Sheet Components [Abstract]
Components of Property and Equipment	The following table shows the components of property and equipment as of the dates presented: June 30, December 31, Estimated Useful Life 2021 2020 Software, including internally developed software 3 years $ 30,515 $ 29,843 Computer equipment 3 to 4 years 16,189 21,400 Finance lease right-of-use assets Shorter of useful life or lease term 3,714 5,067 Leasehold improvements Shorter of useful life or lease term 4,138 4,181 Office equipment, furniture and fixtures 3 to 5 years 1,677 1,671 Total property and equipment 56,233 62,162 Less: Accumulated depreciation and amortization (51,792 ) (56,685 ) Property and equipment, net $ 4,441 $ 5,477
Components of Accrued Expenses and Other Current Liabilities	The following table shows the components of accrued expenses and other current liabilities as of the dates presented: June 30, December 31, 2021 2020 Accrued salary and payroll-related expenses $ 2,038 $ 2,309 Deferred strategic agreement revenues 558 1,657 Accrued liabilities 659 848 Finance lease liabilities - 15 Advanced billings 348 404 Other 1,743 1,319 Total accrued expenses and other current liabilities $ 5,346 $ 6,552

Equity Award Plans (Tables)

Equity Award Plans (Tables)	6 Months Ended
	Jun. 30, 2021
Equity Award Plans [Abstract]
Summary of Stock Option Activity	A summary of stock option activity under the 2006 Plan and the 2013 Plan is as follows: Options Outstanding Number of Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Balances at December 31, 2020 389 $ 23.57 5.77 $ — Options forfeited and cancelled (3 ) 35.68 — — Balances at June 30, 2021 386 23.45 5.32 1,020 Options exercisable 356 25.09 5.10 818 Options vested 356 25.09 5.10 818 Options vested and expected to vest 382 23.65 5.29 993
Summary of RSU Activity	A summary of RSU activity under the 2013 Plan is as follows: RSUs Outstanding Number of Shares Weighted Average Grant Date Fair Value Per Unit Granted and unvested at December 31, 2020 1,006 $ 2.80 RSUs granted 181 1.62 RSUs vested (205 ) 3.10 RSUs cancelled and withheld to cover taxes (96 ) 4.52 Granted and unvested at June 30, 2021 886 $ 2.31

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock-based Compensation Expense	Stock-based compensation expense was allocated as follows during the three and six months ended June 30, 2021 and 2020: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Cost of revenues $ 46 $ 129 $ 81 $ 223 Sales and marketing 70 149 136 259 Research and development 133 217 231 384 General and administrative 130 72 193 147 Total $ 379 $ 567 $ 641 $ 1,013

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Maturities of Lease Liabilities	The maturities of operating lease liabilities as June 30, 2021 are as follows: 2021 (remaining six months) $ 3,067 2022 1,832 Total lease payments 4,899 Less: Amount representing imputed interest (129 ) Present value of lease liabilities 4,770 Less: Current portion of lease liabilities (4,505 ) Non-current portion of lease liabilities $ 265
Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to operating leases was as follows: Six Months Ended Six Months Ended June 30, 2021 June 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows from finance leases $ 15 $ 376 Operating cash flows from finance leases — 14 Operating cash flows from operating leases 3,689 4,005 ROU assets obtained in exchange for lease liabilities: Finance lease liabilities $ — $ — Operating lease liabilities — 6,576
Future Minimum Amounts Due Under Subleases	Future minimum amounts due under subleases as of June 30, 2021 were as follows: Operating Sublease Income 2021 (remaining six months) $ 553 2022 616 Total amounts due under subleases $ 1,169

Net Loss Per Share Available _2

Net Loss Per Share Available to Common Stockholders (Tables)	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Schedule of Calculation of Basic and Diluted Net Loss Per Share	The following table presents the calculation of basic and diluted net loss per share: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Numerator: Net loss available to common stockholders $ (2,501 ) $ (3,481 ) $ (4,713 ) $ (7,452 ) Denominator: Weighted average number of shares, basic and diluted 11,034 6,912 10,669 6,866 Net loss per share available to common stockholders Basic and diluted net loss per common share available to common stockholders $ (0.23 ) $ (0.50 ) $ (0.44 ) $ (1.09 )
Schedule of Potential Shares Common Stock Outstanding Excluded from Computation of Diluted Net Loss Per Share	The following table presents the potential shares of common stock outstanding that were excluded from the computation of diluted net loss per share available to common stockholders for the periods presented because including them would have been anti-dilutive: Three and Six Months Ended June 30, 2021 2020 Options to purchase common stock 386 435 Unvested RSUs 886 863 Total 1,272 1,298

Summary of Business and Signi_3

Summary of Business and Significant Accounting Policies - Additional Information (Details) shares in Thousands	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 31, 2021USD ($)shares	Jun. 30, 2021USD ($)	Sep. 30, 2020Employee	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)		Jul. 15, 2021USD ($)
Summary Of Significant Accounting Policies [Line Items]
Net loss		$ (2,501,000)		$ (3,481,000)	$ (4,713,000)	$ (7,452,000)	$ (14,051,000)
Accumulated deficit		(295,876,000)			(295,876,000)		(291,163,000)	[1]
Cash, cash equivalents and restricted cash		14,377,000			14,377,000
Issuance of common stock through equity distribution agreement, net of offering costs					3,025,000
Allowance for doubtful accounts		1,179,000			1,179,000		1,236,000
Allowance for potential customer revenue credits		$ 395,000			395,000		437,000
Impairment of long-lived assets held-for-use					$ 0	$ 0	$ 0
Accounting Standards Update 2019-12 [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounting standards update, adopted [true false]		true			true
Accounting standards update, adoption date		Jan. 1, 2021			Jan. 1, 2021
Accounting standards update, immaterial effect [true false]		true			true
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate offering price		$ 50,000,000			$ 50,000,000
Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate offering price									$ 40,000,000
2021 Equity Distribution Agreement [Member] | Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Issuance of common stock through equity distribution agreement, net of offering costs (in shares) | shares	4,316
Issuance of common stock through equity distribution agreement, net of offering costs	$ 38,800,000
2021 Equity Distribution Agreement [Member] | JMP Securities [Member] | Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Net of securities fees	$ 1,200,000
2021 Equity Distribution Agreement [Member] | At-the-market Offering [Member] | JMP Securities [Member] | Subsequent Event [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate offering price									$ 40,000,000
Restructuring and Reduction in Force Plan [Member] | 2020 Restructuring Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Expected reduction of workforce | Employee			60
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

Revenues - Additional Informati

Revenues - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Subscription contracts term			1 year
Revenues	$ 6,094	$ 7,275	$ 12,402	$ 15,935
Deferred strategic agreement revenues	558		$ 558		$ 1,657
Deferred costs expected period of benefit			30 months
Google [Member]
Disaggregation Of Revenue [Line Items]
Strategic agreement term			3 years
Strategic agreement term, optional renewal term			1 year
Revenues	2,283	$ 2,283	$ 4,566	$ 4,566
Accounts receivable	$ 1,725		$ 1,725		$ 1,725
Google [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Disaggregation Of Revenue [Line Items]
Percentage of concentration risk			39.00%		34.00%
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Subscription contracts term			2 years
Advance advertiser invoicing period			12 months
Maximum [Member] | Google [Member]
Disaggregation Of Revenue [Line Items]
Strategic agreement term			2 years
Minimum [Member]
Disaggregation Of Revenue [Line Items]
Advance advertiser invoicing period			3 months

Revenues - Expected Future Reve

Revenues - Expected Future Revenue for Subscription Services Related to Performance Obligations Unsatisfied or Partially Unsatisfied (Details) $ in Thousands	Jun. 30, 2021USD ($)
Disaggregation Of Revenue [Line Items]
Subscription Services Revenues	$ 2,034
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Disaggregation Of Revenue [Line Items]
Subscription Services Revenues	$ 1,187
Remaining performance obligation, satisfaction period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Disaggregation Of Revenue [Line Items]
Subscription Services Revenues	$ 807
Remaining performance obligation, satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Disaggregation Of Revenue [Line Items]
Subscription Services Revenues	$ 40
Remaining performance obligation, satisfaction period	1 year

Revenues - Expected Future Re_2

Revenues - Expected Future Revenue for Subscription Services Related to Performance Obligations Unsatisfied or Partially Unsatisfied (Details1) $ in Thousands	Jun. 30, 2021USD ($)
Revenue From Contract With Customer [Abstract]
Subscription Services Revenues	$ 2,034

Revenues - Additional Informa_2

Revenues - Additional Information (Details1) $ in Thousands	Jun. 30, 2021USD ($)
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 2,034
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 1,187
Remaining performance obligation, satisfaction period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 807
Remaining performance obligation, satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 40
Remaining performance obligation, satisfaction period	1 year
Google [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligation	$ 2,218
Remaining performance obligation, satisfaction period	3 months

Revenues - Disaggregation of Re

Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Revenues		$ 6,094	$ 7,275	$ 12,402	$ 15,935
Subscriptions [Member]
Disaggregation Of Revenue [Line Items]
Revenues		3,754	4,938	7,763	11,271
Strategic Agreements [Member]
Disaggregation Of Revenue [Line Items]
Revenues		2,340	2,337	4,639	4,664
United States of America [Member]
Disaggregation Of Revenue [Line Items]
Revenues		4,687	5,527	9,453	12,082
United Kingdom [Member]
Disaggregation Of Revenue [Line Items]
Revenues		758	904	1,638	1,904
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	$ 649	$ 844	$ 1,311	$ 1,949
[1]	No individual country within the “Other” category accounted for 10% or more of revenues for any period presented.

Revenues - Changes in Balances

Revenues - Changes in Balances of Deferred Costs to Obtain and Fulfill Contracts (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)
Deferred Costs to Obtain Contracts [Member]
Capitalized Contract Cost [Line Items]
Balance at beginning of period	$ 283
Costs deferred	133
Amortization	(183)
Balance at end of period	233
Deferred Costs to Fulfill Contracts [Member]
Capitalized Contract Cost [Line Items]
Balance at beginning of period	197
Costs deferred	60
Amortization	(85)
Balance at end of period	$ 172

Balance Sheet Components - Comp

Balance Sheet Components - Components of Property and Equipment (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 56,233	$ 62,162
Less: Accumulated depreciation and amortization	(51,792)	(56,685)
Property and equipment, net	4,441	5,477	[1]
Software, Including Internally Developed Software [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 30,515	29,843
Estimated useful life	3 years
Computer Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 16,189	21,400
Computer Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	3 years
Computer Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	4 years
Finance Lease Right-of-Use Assets [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 3,714	5,067
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,138	4,181
Office Equipment, Furniture and Fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,677	$ 1,671
Office Equipment, Furniture and Fixtures [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	3 years
Office Equipment, Furniture and Fixtures [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Balance Sheet Components [Abstract]
Depreciation and amortization	$ 1,683	$ 2,977

Balance Sheet Components - Co_2

Balance Sheet Components - Components of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Balance Sheet Components [Abstract]
Accrued salary and payroll-related expenses	$ 2,038	$ 2,309
Deferred strategic agreement revenues	558	1,657
Accrued liabilities	659	848
Finance lease liabilities	0	15
Advanced billings	348	404
Other	1,743	1,319
Total accrued expenses and other current liabilities	$ 5,346	$ 6,552	[1]
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

Borrowing - Additional Informat

Borrowing - Additional Information (Details) - Paycheck Protection Program [Member] - Harvest Small Business Finance, LLC [Member] $ in Thousands	May 07, 2020USD ($)
Debt Instrument [Line Items]
Aggregate principal amount of the loan	$ 3,320
Loan, maturity period	2 years
Loan, interest rate	1.00%
Debt instrument expected loan forgiveness	$ 3,320

Restructuring Activities - Addi

Restructuring Activities - Additional Information (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021USD ($)	Sep. 30, 2020Employee	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring related expenses			$ 43		$ 43
2020 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring related expenses	$ 3			$ 3
Restructuring and Reduction in Force Plan [Member] | 2020 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Expected reduction of workforce | Employee		60

Shelf Registration and At-the_2

Shelf Registration and At-the-Market Offering - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 15, 2021	Jul. 31, 2021	Mar. 31, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021
Registration Payment Arrangement [Line Items]
Proceeds from sales				$ 3,025
Offering costs				157
Subsequent Event [Member]
Registration Payment Arrangement [Line Items]
Aggregate offering price	$ 40,000
Remaining shares available under Initial Registration Statement	37,000
Additional shares under Initial Registration Statement	$ 3,000
2019 Equity Distribution Agreement [Member]
Registration Payment Arrangement [Line Items]
Issuance of common stock (in shares)			1,186,000		0	4,570,000
Proceeds from sales			$ 3,025			$ 12,288
Offering costs			$ 157			$ 712
Weighted average sales price (in dollars per share)			$ 2.68			$ 2.84
2021 Equity Distribution Agreement [Member] | Subsequent Event [Member]
Registration Payment Arrangement [Line Items]
Issuance of common stock (in shares)		4,316,000
Proceeds from sales		$ 38,800
Weighted average sales price (in dollars per share)		$ 9.27
Maximum [Member]
Registration Payment Arrangement [Line Items]
Aggregate offering price				50,000		$ 50,000
JMP Securities [Member] | 2021 Equity Distribution Agreement [Member] | Subsequent Event [Member]
Registration Payment Arrangement [Line Items]
Compensation percentage	3.00%
Net of securities fees		$ 1,200
JMP Securities [Member] | Maximum [Member] | 2019 Equity Distribution Agreement [Member]
Registration Payment Arrangement [Line Items]
Aggregate offering price				$ 13,000		$ 13,000
Compensation percentage				5.00%
JMP Securities [Member] | Maximum [Member] | 2021 Equity Distribution Agreement [Member] | At-the-market Offering [Member] | Subsequent Event [Member]
Registration Payment Arrangement [Line Items]
Aggregate offering price	$ 40,000

Equity Award Plans - Additional

Equity Award Plans - Additional Information (Details) - shares shares in Thousands	Jan. 01, 2021	Feb. 28, 2013	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
2013 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares reserved for issuance (in shares)		643	1,488		1,488
Percentage of increase in outstanding common shares					5.00%
Increase in shares available for issuance (in shares)	487
2013 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares reserved for issuance (in shares)		143	269		269
Increase in shares available for issuance (in shares)	97
Percentage of lesser of fair market value of common stock		85.00%
Percentage of increase in outstanding shares		1.00%
Stock issued during period (in shares)			13	13	11	11
2013 Employee Stock Purchase Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in shares available for issuance, authorized (in shares)		100

Equity Award Plans - Summary of

Equity Award Plans - Summary of Stock Options Activity (Details) - 2006 and 2013 Plan [Member] - Stock Options [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Number of Shares
Balance at beginning of period	389
Options forfeited and cancelled	(3)
Balance at end of period	386	389
Options exercisable	356
Options vested	356
Options vested and expected to vest	382
Weighted Average Exercise Price Per Share
Balance at beginning of period	$ 23.57
Options forfeited and cancelled	35.68
Balance at end of period	23.45	$ 23.57
Options exercisable	25.09
Options vested	25.09
Options vested and expected to vest	$ 23.65
Weighted Average Remaining Contractual Term (in Years)
Options outstanding	5 years 3 months 25 days	5 years 9 months 7 days
Options exercisable	5 years 1 month 6 days
Options vested	5 years 1 month 6 days
Options vested and expected to vest	5 years 3 months 14 days
Aggregate Intrinsic Value
Options outstanding	$ 1,020	$ 0
Options exercisable	818
Options vested	818
Options vested and expected to vest	$ 993

Equity Award Plans - Summary _2

Equity Award Plans - Summary of RSU Activity (Details) - 2013 Plan [Member] - RSUs [Member] shares in Thousands	6 Months Ended
	Jun. 30, 2021$ / sharesshares
Number of Shares
Granted and unvested at beginning of period | shares	1,006
RSUs granted | shares	181
RSUs vested | shares	(205)
RSUs cancelled and withheld to cover taxes | shares	(96)
Granted and unvested at end of period | shares	886
Weighted Average Grant Date Fair Value Per Unit
Granted and unvested at beginning of period | $ / shares	$ 2.80
RSUs granted | $ / shares	1.62
RSUs vested | $ / shares	3.10
RSUs cancelled and withheld to cover taxes | $ / shares	4.52
Granted and unvested at end of period | $ / shares	$ 2.31

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 379	$ 567	$ 641	$ 1,013
Cost of Revenues [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	46	129	81	223
Sales and Marketing [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	70	149	136	259
Research and Development [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	133	217	231	384
General and Administrative [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 130	$ 72	$ 193	$ 147

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted	0		0
Expected life			6 months
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options exercised (in shares)	0	0	0	0
Unrecognized compensation cost related to options	$ 90		$ 90
Share-based compensation, weighted average recognized period			1 year 1 month 6 days
RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, weighted average recognized period			2 years
Unrecognized compensation cost related to RSUs	1,553		$ 1,553
Software, Including Internally Developed Software [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment arrangement, amount capitalized	$ 26		$ 40

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	[1]
Leases [Abstract]
Weighted average discount rate, operating lease	6.50%		6.50%
Weighted average remaining lease term, operating lease	10 months 24 days		10 months 24 days
Right-of-use assets, operating leases	$ 4,145		$ 4,145		$ 7,737
Operating leases, rent expense	1,505	$ 1,829	3,239	$ 3,760
Depreciation of finance lease assets	42	162	95	332
Sublease income	$ 271	$ 558	$ 542	$ 1,128
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	[1]
Maturities of Operating Lease Liabilities [Abstract]
2021 (remaining six months)	$ 3,067
2022	1,832
Total lease payments	4,899
Less: Amount representing imputed interest	(129)
Present value of lease liabilities	4,770
Less: Current portion of lease liabilities	(4,505)	$ (6,800)
Non-current portion of lease liabilities	$ 265	$ 1,814
[1]	Derived from the Company’s audited consolidated financial statements as of December 31, 2020.

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$ 15	$ 376
Operating cash flows from finance leases	0	14
Operating cash flows from operating leases	3,689	4,005
ROU assets obtained in exchange for lease liabilities:
Finance lease liabilities	0	0
Operating lease liabilities	$ 0	$ 6,576

Leases - Future Minimum Amounts

Leases - Future Minimum Amounts Due Under Subleases (Details) $ in Thousands	Jun. 30, 2021USD ($)
Leases [Abstract]
2021 (remaining six months)	$ 553
2022	616
Total amounts due under subleases	$ 1,169

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income tax benefit	$ (289)	$ (521)	$ (197)	$ (496)
Pre-tax loss	(2,790)	(4,002)	(4,910)	(7,948)
Uncertain tax positions, interest or penalties	$ 0	$ 0	$ 0	$ 0

Net Loss Per Share Available _3

Net Loss Per Share Available to Common Stockholders - Schedule of Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Numerator:
Net loss available to common stockholders	$ (2,501)	$ (3,481)	$ (4,713)	$ (7,452)	$ (14,051)
Denominator:
Weighted average number of shares, basic and diluted	11,034	6,912	10,669	6,866
Net loss per share available to common stockholders
Basic and diluted net loss per common share available to common stockholders	$ (0.23)	$ (0.50)	$ (0.44)	$ (1.09)

Net Loss Per Share Available _4

Net Loss Per Share Available to Common Stockholders - Schedule of Potential Shares of Common Shares Outstanding (Details) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from computation of diluted net loss per share (in shares)	1,272	1,298
Options to Purchase Common Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from computation of diluted net loss per share (in shares)	386	435
Unvested RSUs [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from computation of diluted net loss per share (in shares)	886	863

Segment Reporting - Additional

Segment Reporting - Additional Information (Details)	6 Months Ended
	Jun. 30, 2021Segment
Segment Reporting [Abstract]
Number of reporting segment	1
Number of operating segment	1

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	6 Months Ended
	Jul. 31, 2021	Jun. 30, 2021	Jul. 15, 2021
Subsequent Event [Line Items]
Proceeds from sales		$ 3,025
Maximum [Member]
Subsequent Event [Line Items]
Aggregate gross sales price		$ 50,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate gross sales price			$ 40,000
2021 Equity Distribution Agreement [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Issuance of common stock (in shares)	4,316
Proceeds from sales	$ 38,800
JMP Securities [Member] | 2021 Equity Distribution Agreement [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Net of securities fees	$ 1,200
JMP Securities [Member] | At-the-market Offering [Member] | 2021 Equity Distribution Agreement [Member] | Subsequent Event [Member] | Maximum [Member]
Subsequent Event [Line Items]
Aggregate gross sales price			$ 40,000