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Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2020	Jul. 31, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity File Number	001-38678
Entity Registrant Name	UPWORK INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-4337682
Entity Address, Address Line One	2625 Augustine Drive, Suite 601
Entity Address, City or Town	Santa Clara,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95054
Entity Central Index Key	0001627475
Current Fiscal Year End Date	--12-31
City Area Code	650
Local Phone Number	316-7500
Title of 12(b) Security	Common Stock, $0.0001 par value per share
Trading Symbol	UPWK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		120,276,173

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 76,755	$ 48,392
Marketable securities	69,606	85,481
Funds held in escrow, including funds in transit	129,553	108,721
Trade and client receivables – net of allowance of $2,075 and $2,215 as of June 30, 2020 and December 31, 2019, respectively	33,230	30,156
Prepaid expenses and other current assets	9,009	7,885
Total current assets	318,153	280,635
Property and equipment, net	27,284	21,454
Goodwill	118,219	118,219
Intangible assets, net	2,001	3,335
Operating lease asset	21,645	21,908
Other assets, noncurrent	1,546	829
Total assets	488,848	446,380
Current liabilities
Accounts payable	5,180	652
Escrow funds payable	129,553	108,721
Debt, current	7,594	7,584
Accrued expenses and other current liabilities	25,364	18,342
Deferred revenue	14,984	13,799
Total current liabilities	182,675	149,098
Debt, noncurrent	6,929	10,699
Operating lease liability, noncurrent	22,105	21,186
Other liabilities, noncurrent	6,996	5,973
Total liabilities	218,705	186,956
Commitments and contingencies (Note 6)
Stockholders’ equity
Common stock, $0.0001 par value; 490,000,000 shares authorized as of June 30, 2020 and December 31, 2019; 119,267,694 and 113,604,398 shares issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	12	11
Additional paid-in capital	463,133	431,370
Accumulated deficit	(193,002)	(171,957)
Total stockholders’ equity	270,143	259,424
Total liabilities and stockholders’ equity	$ 488,848	$ 446,380

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,075	$ 2,215
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	490,000,000,000	490,000,000,000
Common stock, shares issued (in shares)	119,267,694,000	113,604,398
Common stock, shares outstanding (in shares)	119,267,694,000	113,604,398

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue	$ 87,531	$ 73,783	$ 170,727	$ 142,259
Cost of revenue	25,408	21,588	48,893	42,713
Gross profit	62,123	52,195	121,834	99,546
Operating expenses
Research and development	20,547	15,696	39,895	31,496
Sales and marketing	34,440	24,479	65,118	44,997
General and administrative	17,102	14,064	34,926	29,725
Provision for transaction losses	1,018	855	1,930	1,492
Total operating expenses	73,107	55,094	141,869	107,710
Loss from operations	(10,984)	(2,899)	(20,035)	(8,164)
Interest expense	258	357	488	730
Other (income) expense, net	(248)	(832)	483	(1,311)
Loss before income taxes	(10,994)	(2,424)	(21,006)	(7,583)
Income tax provision	(30)	(27)	(39)	(28)
Net loss	$ (11,024)	$ (2,451)	$ (21,045)	$ (7,611)
Net loss per share, basic and diluted (in dollars per share)	$ (0.09)	$ (0.02)	$ (0.18)	$ (0.07)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	116,523,570	108,683,099	115,321,264	107,665,492

CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCKAND STOCKHOLDERS’ EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment from adoption of new accounting pronouncement		$ (11,799)				$ (11,799)
Beginning balance (in shares) at Dec. 31, 2018			106,454,321
Beginning balance at Dec. 31, 2018	$ 243,745		$ 11	$ 387,233	$ (143,499)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options and common stock warrants (in shares)			3,918,539
Issuance of common stock upon exercise of stock options and common stock warrants	10,350			10,350
Stock-based compensation expense	6,716			6,716
Issuance of common stock for settlement of RSUs (in shares)			55,362
Issuance of common stock for settlement of RSUs	$ 0
Issuance of common stock in connection with employee stock purchase plan (in shares)	280,308
Issuance of common stock in connection with employee stock purchase plan	$ 3,577			3,577
Net loss	(7,611)				(7,611)
Ending balance (in shares) at Jun. 30, 2019			110,708,530
Ending balance at Jun. 30, 2019	244,978		$ 11	407,876	(162,909)
Beginning balance (in shares) at Mar. 31, 2019			106,729,758
Beginning balance at Mar. 31, 2019	231,741		$ 11	392,188	(160,458)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options and common stock warrants (in shares)			3,645,434
Issuance of common stock upon exercise of stock options and common stock warrants	9,583			9,583
Stock-based compensation expense	2,528			2,528
Issuance of common stock for settlement of RSUs (in shares)			53,030
Issuance of common stock for settlement of RSUs	$ 0
Issuance of common stock in connection with employee stock purchase plan (in shares)	280,308
Issuance of common stock in connection with employee stock purchase plan	$ 3,577			3,577
Net loss	(2,451)				(2,451)
Ending balance (in shares) at Jun. 30, 2019			110,708,530
Ending balance at Jun. 30, 2019	244,978		$ 11	407,876	(162,909)
Beginning balance (in shares) at Dec. 31, 2019			113,604,398
Beginning balance at Dec. 31, 2019	259,424		$ 11	431,370	(171,957)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options and common stock warrants (in shares)			4,647,550
Issuance of common stock upon exercise of stock options and common stock warrants	16,010		$ 1	16,009
Stock-based compensation expense	12,193			12,193
Issuance of common stock for settlement of RSUs (in shares)			751,502
Issuance of common stock for settlement of RSUs	0
Tides Foundation common stock warrant expense and other	900			900
Issuance of common stock in connection with employee stock purchase plan (in shares)			264,244
Issuance of common stock in connection with employee stock purchase plan	2,661			2,661
Net loss	(21,045)				(21,045)
Ending balance (in shares) at Jun. 30, 2020			119,267,694
Ending balance at Jun. 30, 2020	270,143		$ 12	463,133	(193,002)
Beginning balance (in shares) at Mar. 31, 2020			114,866,938
Beginning balance at Mar. 31, 2020	258,736		$ 11	440,703	(181,978)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options and common stock warrants (in shares)			3,697,663
Issuance of common stock upon exercise of stock options and common stock warrants	12,845		$ 1	12,844
Stock-based compensation expense	6,866			6,866
Issuance of common stock for settlement of RSUs (in shares)			438,849
Issuance of common stock for settlement of RSUs	0
Tides Foundation common stock warrant expense and other	59			59
Issuance of common stock in connection with employee stock purchase plan (in shares)			264,244
Issuance of common stock in connection with employee stock purchase plan	2,661			2,661
Net loss	(11,024)				(11,024)
Ending balance (in shares) at Jun. 30, 2020			119,267,694
Ending balance at Jun. 30, 2020	$ 270,143		$ 12	$ 463,133	$ (193,002)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (21,045)	$ (7,611)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Provision for transaction losses	1,606	1,038
Depreciation and amortization	4,786	2,827
Amortization of debt issuance costs	26	26
Amortization of discount on purchases of marketable securities	(257)	(665)
Amortization of operating lease asset	1,945	2,177
Tides Foundation common stock warrant expense	376	377
Stock-based compensation expense	12,671	6,926
Changes in operating assets and liabilities:
Trade and client receivables	(4,773)	(29,978)
Prepaid expenses and other assets	(968)	(585)
Operating lease liability	(925)	(998)
Accounts payable	4,403	(589)
Accrued expenses and other liabilities	7,232	(2,088)
Deferred revenue	1,585	1,317
Net cash provided by (used in) operating activities	6,662	(27,826)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities	(47,748)	(86,567)
Proceeds from maturities of marketable securities	64,000	24,800
Purchases of property and equipment	(5,627)	(7,435)
Internal-use software and platform development costs	(3,559)	(2,182)
Net cash provided by (used in) investing activities	7,066	(71,384)
CASH FLOWS FROM FINANCING ACTIVITIES:
Changes in escrow funds payable	20,832	20,116
Proceeds from exercises of stock options and common stock warrants	16,010	10,340
Proceeds from borrowings on debt	18,000	50,000
Repayment of debt	(21,786)	(26,893)
Proceeds from employee stock purchase plan	2,661	3,577
Net cash provided by financing activities	35,717	57,140
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	49,445	(42,070)
Cash, cash equivalents, and restricted cash—beginning of period	159,603	230,067
Cash, cash equivalents, and restricted cash—end of period	209,048	187,997
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	499	714
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING ACTIVITIES:
Property and equipment purchased but not yet paid	478	3,140
Internal-use software and platform development costs incurred but not yet paid	$ 170	$ 0

Description of Business	6 Months Ended
Description of Business	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Upwork Inc. (the “Company” or “Upwork”) operates an online talent solution that enables businesses (“clients”) to find and work with highly-skilled independent professionals (“freelancers,” and, together with clients, “users”). The Company was originally incorporated in the state of Delaware in December 2013 prior to and in connection with the combination (the “Elance-oDesk Combination”) of Elance, Inc. (“Elance”) and oDesk Corporation (“oDesk”). The Company changed its name to Elance-oDesk, Inc. shortly before the Elance-oDesk Combination in March 2014, and later to Upwork Inc. in May 2015. In 2015, the Company relaunched as Upwork and commenced consolidation of its two operating platforms. In 2016, following completion of the platform consolidation, the Company began operating under a single platform. The Company is currently headquartered in Santa Clara, California. Unless otherwise expressly stated or the context otherwise requires, the terms “Upwork” and the “Company” in these notes to the condensed consolidated financial statements refer to Upwork and its wholly-owned subsidiaries.

Basis of Presentation and Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and applicable rules and regulations of the SEC regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 (the “Annual Report”), filed with the SEC on March 2, 2020.

The condensed consolidated balance sheet as of December 31, 2019 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP.

The condensed consolidated financial statements include the accounts of Upwork Inc. and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.

The accompanying condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, changes in stockholders’ equity and cash flows for the interim periods, but do not purport to be indicative of the results of operations or financial condition to be anticipated for the full year ending December 31, 2020.

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the periods presented. Such estimates include, but are not limited to: the useful lives of assets; assessment of the recoverability of long-lived assets; goodwill impairment; standalone selling price of material rights and the period of time over which to defer and recognize the consideration allocated to the material rights; allowance for doubtful accounts; liabilities relating to transaction losses; the valuation of warrants; stock-based compensation; and accounting for income taxes. Management bases its estimates on historical experience and on various other assumptions that management believes to be reasonable under the circumstances. The Company evaluates its estimates, assumptions, and judgments on an ongoing basis using historical experience and other factors and revises them when facts and circumstances dictate.

Due to the COVID-19 pandemic, there has been uncertainty and disruption in the global economy. The Company is not aware of any specific event or circumstance that would require an update to its estimates or judgments or a revision of the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained. Actual results could differ materially from these estimates under different assumptions or conditions.

Impacts of Recently Adopted Accounting Pronouncements on 2019 Interim Reporting

On December 31, 2019, the Company adopted Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (“Topic 606”), ASU No. 2016-02, Leases (“Topic 842”), and ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (“Topic 230”) effective as of January 1, 2019. As a result, interim results for reporting periods beginning on or after January 1, 2019 will differ from amounts previously reported on the Company’s quarterly reports on Form 10-Q. The following table summarizes the impacts of adopting these standards on the Company’s previously issued condensed consolidated statements of operations for

the three and six months ended June 30, 2019 and condensed consolidated statement of cash flows for the six months ended June 30, 2019 (in thousands):


	Balances, Previously Issued		Topic 606		Topic 842 ⁽¹⁾		Topic 230		Balances, as Reported
Condensed Consolidated Statement of Operations for the Three Months Ended June 30, 2019
Revenue	$	74,256	$	(473)	$	—	$	—	$	73,783
Operating expense—General and administrative	14,113		—		(49)		—		14,064
Net loss	(2,027)		(473)		49		—		(2,451)


Condensed Consolidated Statement of Operations for the Six Months Ended June 30, 2019
Revenue	$	143,180	$	(921)	$	—	$	—	$	142,259
Operating expense—General and administrative	29,790		—		(65)		—		29,725
Net loss	(6,755)		(921)		65		—		(7,611)
Net loss per share, basic and diluted	(0.06)		(0.01)		—		—		(0.07)

Condensed Consolidated Statement of Cash Flows for the Six Months Ended June 30, 2019
Operating activities
Net loss	$	(6,755)	$	(921)	$	65	$	—	$	(7,611)
Amortization of operating lease asset	—		—		2,177		—		2,177
Trade and client receivables	(30,288)		310		—		—		(29,978)
Prepaid expenses and other assets	(701)		—		116		—		(585)
Operating lease liability	—		—		(998)		—		(998)
Accrued expenses and other liabilities	(430)		(298)		(1,360)		—		(2,088)
Deferred revenue	408		909		—		—		1,317
Investing activities—decrease (increase) in restricted cash	150		—		—		(150)		—
Financing activities—changes in funds held in escrow, including funds in transit	(20,116)		—		—		20,116		—
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(62,036)		—		—		19,966		(42,070)
Cash, cash equivalents, and restricted cash—beginning of period	129,128		—		—		100,939		230,067
Cash, cash equivalents, and restricted cash—end of period	67,092		—		—		120,905		187,997

⁽¹⁾ Amounts include other adjustments made in conjunction with the adoption of Topic 842.

Recently Adopted Accounting Pronouncements

The significant accounting policies applied in the Company’s audited consolidated financial statements, as disclosed in the Annual Report, are applied consistently in these unaudited interim condensed consolidated financial statements, except as noted below.

In June 2016, the Financial Accounting Standards Board (the “FASB”) issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. The Company adopted ASU No. 2016-13 and related updates on January 1, 2020. The adoption did not have a material impact on the Company’s condensed consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Others (Topic 350): Simplifying the Test for Goodwill Impairment. ASU No. 2017-04 eliminates Step 2 from the goodwill impairment test, which measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The Company adopted ASU No. 2017-04 on January 1, 2020. The adoption did not have a material impact on the Company’s condensed consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value measurements. The Company adopted ASU No. 2018-13 on January 1, 2020. The adoption did not have a material impact on the Company’s condensed consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. ASU No. 2018-15 aligns the requirements for capitalizing implementation costs in a cloud computing arrangement service contract with the requirements for capitalizing implementation costs incurred for an internal-use software license. The Company adopted ASU No. 2018-15 on January 1, 2020 using the prospective adoption method. The adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Recent Accounting Pronouncements Not Yet Adopted

The Company has reviewed all other accounting pronouncements issued during the six months ended June 30, 2020 and concluded they were either not applicable or not expected to have a material impact on the Company’s condensed consolidated financial statements.

Revenue

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue

Disaggregation of Revenue

See “Note 9—Segment and Geographical Information” for the Company’s revenue disaggregated by type of service and geographic area.

Remaining Performance Obligations

As of June 30, 2020, the Company had approximately $18.5 million of remaining performance obligations. The Company’s remaining performance obligations consist of transaction price that has been allocated to unexercised material rights related to the Company’s arrangements with freelancers subject to tiered service fees, subscriptions, memberships, “Connects” (virtual tokens that allow freelancers to bid on projects on the Company’s platform), and certain incentive payments made to the Company by payment processors. As of June 30, 2020, the Company expects to recognize approximately $15.0 million over the next 12 months, with the remaining balance recognized thereafter.

The Company has applied the practical expedients and exemptions and does not disclose the value of remaining performance obligations for (i) contracts with an original expected length of one year or less; and (ii) contracts for which the variable consideration is allocated entirely to a wholly unsatisfied promise to transfer a distinct service that forms part of a single performance obligation under the series guidance.

Contract Balances

The following table provides information about the balances of the Company’s trade and client receivables, net of allowance and contract liabilities included in deferred revenue and other liabilities, noncurrent (in thousands):


	June 30, 2020		December 31, 2019
Trade and client receivables, net of allowance	$	33,230	$	30,156
Contract liabilities
Deferred revenue	14,984		13,799
Deferred revenue (component of other liabilities, noncurrent)	3,552		3,153

During the three and six months ended June 30, 2020, changes in the contract liabilities balances were a result of normal business activity, deferral of revenue related to arrangements with freelancers subject to tiered service fees and related allocation of transaction price to material rights, and a change in estimate related to the period of time over which to recognize the consideration allocated to the material rights.

Revenue recognized during the three and six months ended June 30, 2020 that was included in deferred revenue as of March 31, 2020 and December 31, 2019 was $4.9 million and $8.0 million, respectively. Revenue recognized during the three and six months ended June 30, 2019 that was included in deferred revenue as of March 31, 2019 and January 1, 2019 was $3.6 million and $6.2 million, respectively.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

+ Details

Fair Value Measurements

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

The Company defines fair value as the exchange price that would be received from the sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The authoritative guidance describes three levels of inputs that may be used to measure fair value:

•Level I—Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets;

•Level II—Observable inputs other than Level I prices, such as unadjusted quoted prices for similar assets or liabilities in active markets, unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

•Level III—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs are based on the Company’s own assumptions used to measure assets and liabilities at fair value and require significant management judgment or estimation.

The categorization of a financial instrument within the fair value hierarchy is based upon the lowest level of input that is significant to its fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires management to make judgments and consider factors specific to the assets or liabilities.

The Company’s financial instruments that are carried at fair value consist of Level I and Level II assets as of June 30, 2020 and December 31, 2019. The following tables set forth the fair value of the Company’s financial assets measured at fair value on a recurring basis based on the three-tier fair value hierarchy (in thousands):


	June 30, 2020
	Level I		Level II		Level III		Total

Cash equivalents—money market funds	$	59,832	$	—	$	—	$	59,832

Marketable securities
Commercial paper	—		44,876		—		44,876

U.S. government securities	24,730		—		—		24,730
Total financial assets	$	84,562	$	44,876	$	—	$	129,438


	December 31, 2019
	Level I		Level II		Level III		Total
Cash equivalents—money market funds	$	35,286	$	—	$	—	$	35,286
Marketable securities
Commercial paper	—		50,794		—		50,794
U.S. government securities	34,687		—		—		34,687
Total financial assets	$	69,973	$	50,794	$	—	$	120,767

For each of the three and six months ended June 30, 2020 and 2019, the gross unrealized gains and losses on the Company’s marketable securities were immaterial. As of June 30, 2020 and 2019, the Company considered any decreases in market value to be temporary in nature and did not consider any of the Company’s marketable securities to be other-than-temporarily impaired. As such, the Company did not record any impairment charges with respect to its marketable securities during each of the three and six months ended June 30, 2020 and 2019.

As of June 30, 2020 and December 31, 2019, the Company had debt obligations outstanding of $14.5 million and $18.3 million, respectively, under the Company’s Loan and Security Agreement, as amended (the “Loan Agreement”). As of June 30, 2020, the carrying value approximated fair value as borrowings under the Loan Agreement bore interest at variable rates, and the Company believes its credit risk quality is consistent with when the debt was originated. The Company considered the balances outstanding under the Loan Agreement to be Level II liabilities as of June 30, 2020 and December 31, 2019. See “Note 7—Debt.”

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Balance Sheet Components

6 Months Ended

Jun. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Components

Cash and Cash Equivalents, Restricted Cash, and Funds Held In Escrow, Including Funds In Transit

The following table reconciles cash and cash equivalents, restricted cash, and funds held in escrow that are restricted as reported in the condensed consolidated balance sheets to the total of the same amounts shown in the condensed consolidated statements of cash flows as of June 30, 2020 and December 31, 2019 (in thousands):


	June 30, 2020		December 31, 2019
Cash and cash equivalents	$	76,755	$	48,392
Restricted cash	2,740		2,490
Funds held in escrow, including funds in transit	129,553		108,721
Total cash, cash equivalents, and restricted cash as shown in the condensed consolidated statement of cash flows	$	209,048	$	159,603

Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):


	June 30, 2020		December 31, 2019
Computer equipment and software	$	4,664	$	3,613
Internal-use software and platform development	16,027		12,726
Leasehold improvements	14,597		10,576
Office furniture and fixtures	3,354		2,454
Total property and equipment	38,642		29,369
Less: accumulated depreciation	(11,358)		(7,915)
Property and equipment, net	$	27,284	$	21,454

For the three months ended June 30, 2020 and 2019, depreciation expense related to property and equipment was $0.8 million and $0.6 million, respectively. For the six months ended June 30, 2020 and 2019, depreciation expense related to property and equipment was $1.5 million and $1.4 million, respectively.

For the three months ended June 30, 2020 and 2019, the Company capitalized $1.7 million and $1.4 million of internal-use software and platform development costs, respectively. For the six months ended June 30, 2020 and 2019, the Company capitalized $3.3 million and $2.5 million of internal-use software and platform development costs, respectively.

For the three and six months ended June 30, 2020, amortization expense related to the capitalized internal-use software and platform development costs was $1.1 million and $2.0 million, respectively. For the three and six months ended June 30, 2019, amortization expense related to the capitalized internal-use software and platform development costs was immaterial.

Intangible Assets, Net

All of the Company’s identifiable intangible assets were acquired in March 2014 from the Elance-oDesk Combination. For each of the three months ended June 30, 2020 and 2019, amortization expense of intangible assets was $0.7 million. For each of the six months ended June 30, 2020 and 2019, amortization expense of intangible assets was $1.3 million. Amortization expense is included in general and administrative expenses.

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):


	June 30, 2020		December 31, 2019
Accrued compensation and related benefits	$	7,245	$	5,344
Accrued freelancer costs	1,552		622
Accrued indirect taxes	2,044		2,401
Accrued vendor expenses	9,720		5,485
Accrued payment processing fees	837		832
Operating lease liability, current	3,053		3,214
Other	913		444
Total accrued expenses and other current liabilities	$	25,364	$	18,342

In February 2020, the Company made changes to its organizational structure to better align with its business strategies and streamline the delivery of its end-to-end user experiences. During the six months ended June 30, 2020, the Company incurred and paid $1.6 million related to these initiatives.

Operating Leases

On January 1, 2020, the Company commenced an operating lease of one additional floor in its Chicago, Illinois office. As a result, the Company recognized a $1.7 million operating lease asset and $1.7 million operating lease liability on January 1, 2020, which are included in operating lease asset and operating lease liability, noncurrent, respectively, on the condensed consolidated balance sheet as of June 30, 2020. The lease has an initial term of five years with the option to renew for an additional five years at the end of the initial lease term. Total minimum lease payments under the initial term are $2.1 million. For the initial measurement of the present value of the lease payments associated with this lease, the Company used its incremental borrowing rate, which is a collateralized rate and approximates the rate at which the Company could borrow, on a secured basis for a similar term, an amount equal to its lease payments in a similar economic environment.

The Company includes lease payments associated with renewal options in its operating lease asset and liability only when it becomes reasonably certain that the Company will exercise the renewal option. The Company has not included renewal options for any of its operating leases in its determination of lease liabilities as of June 30, 2020.

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Letters of Credit In conjunction with the operating lease agreements, as of June 30, 2020 and December 31, 2019, the Company had three irrevocable letters of credit outstanding in the aggregate amounts of $1.0 million and $0.8 million, respectively. No amounts had been drawn against these letters of credit as of June 30, 2020 and December 31, 2019. Contingencies The Company accrues contingent liabilities when it is probable that future expenditures will be made and such expenditures can be reasonably estimated. From time to time in the normal course of business, various claims and litigation have been asserted or commenced. Due to uncertainties inherent in litigation and other claims, the Company can give no assurance that it will prevail in any such matters, which could subject the Company to significant liability or damages. Any claims or litigation could have an adverse effect on the Company’s business, financial position, results of operations, or cash flows in or following the period that claims or litigation are resolved. As of June 30, 2020 and December 31, 2019, the Company was not a party to any material legal proceedings or claims, nor is the Company aware of any pending or threatened litigation or claims that could reasonably be expected to have a material adverse effect on its business, operating results, cash flows, or financial condition. Accordingly, the Company has determined that the existence of a material loss as of these dates is neither probable nor reasonably possible. Indemnification The Company has indemnification agreements with its officers, directors, and certain key employees to indemnify them while they are serving in good faith in their respective positions. In the ordinary course of business, the Company enters into contractual arrangements under which it agrees to provide indemnification of varying scope and terms to clients, business partners, vendors, and other parties, including, but not limited to, losses arising out of the Company’s breach of such agreements, claims related to potential data or information security breaches, intellectual property infringement claims made by third parties, and other liabilities relating to or arising from the Company’s products and services or its acts or omissions. In addition, subject to the terms of the applicable agreement, as part of the Company’s Upwork Enterprise offering, the Company indemnifies clients that subscribe to worker classification services for losses arising from worker misclassification. It is not possible to determine the maximum potential loss under these indemnification provisions due to the Company’s limited history of prior indemnification claims and the facts and circumstances involved in each particular provision.

Debt

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Debt

The following table presents the carrying value of the Company’s debt obligations as of June 30, 2020 and December 31, 2019 (in thousands):


	June 30, 2020			December 31, 2019
First Term Loan—18 months of interest-only payments ended in March 2019 followed by 36 equal monthly installments of principal plus interest, maturing March 2022; interest at prime plus 0.25% per annum	$	8,750		$	11,250
Second Term Loan—17 months of interest-only payments ended in March 2019 followed by 42 equal monthly installments of principal plus interest, maturing September 2022; interest at prime plus 0.25% per annum	5,785			7,071

Total debt	14,535			18,321
Less: unamortized debt discount issuance costs	(12)			(38)
Balance	14,523			18,283
Debt, current	(7,594)			(7,584)
Debt, noncurrent	$	6,929		$	10,699
Weighted-average interest rate	4.99		%	6.93		%

Under the Loan Agreement, the aggregate amount of the facility is up to $49.0 million, consisting of a term loan in the original principal amount of $15.0 million (the “First Term Loan”), a term loan in the original principal amount of $9.0 million (the “Second Term Loan” and, together with the First Term Loan, the “Term Loans”), and a revolving line of credit, which permits borrowings of up to $25.0 million subject to customary conditions. Among other things, the Company may only borrow funds under the revolving line of credit if, after giving effect thereto, total borrowings under the line of credit do not exceed a specified percentage of eligible trade and client accounts receivable. The Company has granted its lender first-priority liens against substantially all of its assets, as collateral, excluding the Company’s intellectual property (but including proceeds therefrom) and the funds and assets held by the Company’s subsidiary, Upwork Escrow Inc. The Company has also agreed to a negative pledge on its intellectual property. The Loan Agreement also requires that the Company maintain an adjusted quick ratio of 1.75. The Loan Agreement also includes a restrictive covenant on dividend payments other than dividends paid solely in common stock. The Company was in compliance with its covenants under the Loan Agreement as of June 30, 2020 and December 31, 2019.

As a result of the uncertainty caused by the COVID-19 pandemic, the Company drew down $15.0 million and $3.0 million under the revolving line of credit in March and April 2020, respectively, both of which the Company subsequently repaid in full in May 2020.

Pursuant to the terms of the Loan Agreement, the Company commenced repayment on the Term Loans in April 2019. During the three and six months ended June 30, 2020, the Company repaid $1.3 million and $2.5 million related to the First Term Loan, respectively, and $0.6 million and $1.3 million related to the Second Term Loan, respectively. During both the three and six months ended June 30, 2019, the Company repaid $1.3 million related to the First Term Loan and $0.6 million related to the Second Term Loan.

Net Loss per Share

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Net Loss per Share

The following table sets forth the computation of the Company’s basic and diluted net loss per share for the periods presented (in thousands, except share and per share data):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Numerator:
Net loss	$	(11,024)	$	(2,451)	$	(21,045)	$	(7,611)


Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted	116,523,570		108,683,099		115,321,264		107,665,492

Net loss per share, basic and diluted	$	(0.09)	$	(0.02)	$	(0.18)	$	(0.07)

The following potentially dilutive shares were excluded from the computation of diluted net loss per share because including them would have been anti-dilutive:


	As of June 30,
	2020	2019
Options to purchase common stock	9,878,333	19,771,277
Common stock issuable upon exercise of common stock warrants	450,000	500,000
Common stock issuable upon vesting of restricted stock units	6,191,541	1,213,337
Common stock issuable in connection with employee stock purchase plan	964,974	802,389
Total	17,484,848	22,287,003

Segment and Geographical Information

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Segment and Geographical Information

The Company operates as one operating and reportable segment for purposes of allocating resources and evaluating financial performance.

The following table sets forth total revenue by type of service for the periods presented (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Marketplace	$	78,464	$	65,728	$	153,246	$	126,183
Managed services	9,067		8,055		17,481		16,076
Total revenue	$	87,531	$	73,783	$	170,727	$	142,259

The Company generates its revenue from freelancers and clients. The following table sets forth total revenue by geographic area based on the billing address of its freelancers and clients for the periods presented (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Freelancers
United States	$	14,300	$	12,360	$	28,297	$	24,129
India	7,879		6,834		15,352		13,398
Philippines	5,304		4,880		10,441		9,411
Rest of world	25,833		22,360		50,188		43,838
Total freelancers	53,316		46,434		104,278		90,776
Clients
United States	24,354		21,431		47,313		39,105
Rest of world	9,861		5,918		19,136		12,378
Total clients	34,215		27,349		66,449		51,483
Total revenue	$	87,531	$	73,783	$	170,727	$	142,259

Substantially all of the Company’s long-lived assets were located in the United States as of June 30, 2020 and December 31, 2019.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 31
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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-URI http://asc.fasb.org/topic&trid=2134510

+ Details

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events[Placeholder - Footnote will be removed if no subsequent events.]

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and applicable rules and regulations of the SEC regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 (the “Annual Report”), filed with the SEC on March 2, 2020. The condensed consolidated balance sheet as of December 31, 2019 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP. The condensed consolidated financial statements include the accounts of Upwork Inc. and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. The accompanying condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, changes in stockholders’ equity and cash flows for the interim periods, but do not purport to be indicative of the results of operations or financial condition to be anticipated for the full year ending December 31, 2020.
Use of Estimates	Use of Estimates The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the periods presented. Such estimates include, but are not limited to: the useful lives of assets; assessment of the recoverability of long-lived assets; goodwill impairment; standalone selling price of material rights and the period of time over which to defer and recognize the consideration allocated to the material rights; allowance for doubtful accounts; liabilities relating to transaction losses; the valuation of warrants; stock-based compensation; and accounting for income taxes. Management bases its estimates on historical experience and on various other assumptions that management believes to be reasonable under the circumstances. The Company evaluates its estimates, assumptions, and judgments on an ongoing basis using historical experience and other factors and revises them when facts and circumstances dictate.
Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Pronouncements The significant accounting policies applied in the Company’s audited consolidated financial statements, as disclosed in the Annual Report, are applied consistently in these unaudited interim condensed consolidated financial statements, except as noted below. In June 2016, the Financial Accounting Standards Board (the “FASB”) issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. The Company adopted ASU No. 2016-13 and related updates on January 1, 2020. The adoption did not have a material impact on the Company’s condensed consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Others (Topic 350): Simplifying the Test for Goodwill Impairment. ASU No. 2017-04 eliminates Step 2 from the goodwill impairment test, which measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The Company adopted ASU No. 2017-04 on January 1, 2020. The adoption did not have a material impact on the Company’s condensed consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value measurements. The Company adopted ASU No. 2018-13 on January 1, 2020. The adoption did not have a material impact on the Company’s condensed consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. ASU No. 2018-15 aligns the requirements for capitalizing implementation costs in a cloud computing arrangement service contract with the requirements for capitalizing implementation costs incurred for an internal-use software license. The Company adopted ASU No. 2018-15 on January 1, 2020 using the prospective adoption method. The adoption did not have a material impact on the Company’s condensed consolidated financial statements. Recent Accounting Pronouncements Not Yet Adopted The Company has reviewed all other accounting pronouncements issued during the six months ended June 30, 2020 and concluded they were either not applicable or not expected to have a material impact on the Company’s condensed consolidated financial statements.

Basis of Presentation and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements

The following table summarizes the impacts of adopting these standards on the Company’s previously issued condensed consolidated statements of operations for

the three and six months ended June 30, 2019 and condensed consolidated statement of cash flows for the six months ended June 30, 2019 (in thousands):


	Balances, Previously Issued		Topic 606		Topic 842 ⁽¹⁾		Topic 230		Balances, as Reported
Condensed Consolidated Statement of Operations for the Three Months Ended June 30, 2019
Revenue	$	74,256	$	(473)	$	—	$	—	$	73,783
Operating expense—General and administrative	14,113		—		(49)		—		14,064
Net loss	(2,027)		(473)		49		—		(2,451)


Condensed Consolidated Statement of Operations for the Six Months Ended June 30, 2019
Revenue	$	143,180	$	(921)	$	—	$	—	$	142,259
Operating expense—General and administrative	29,790		—		(65)		—		29,725
Net loss	(6,755)		(921)		65		—		(7,611)
Net loss per share, basic and diluted	(0.06)		(0.01)		—		—		(0.07)

Condensed Consolidated Statement of Cash Flows for the Six Months Ended June 30, 2019
Operating activities
Net loss	$	(6,755)	$	(921)	$	65	$	—	$	(7,611)
Amortization of operating lease asset	—		—		2,177		—		2,177
Trade and client receivables	(30,288)		310		—		—		(29,978)
Prepaid expenses and other assets	(701)		—		116		—		(585)
Operating lease liability	—		—		(998)		—		(998)
Accrued expenses and other liabilities	(430)		(298)		(1,360)		—		(2,088)
Deferred revenue	408		909		—		—		1,317
Investing activities—decrease (increase) in restricted cash	150		—		—		(150)		—
Financing activities—changes in funds held in escrow, including funds in transit	(20,116)		—		—		20,116		—
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(62,036)		—		—		19,966		(42,070)
Cash, cash equivalents, and restricted cash—beginning of period	129,128		—		—		100,939		230,067
Cash, cash equivalents, and restricted cash—end of period	67,092		—		—		120,905		187,997

⁽¹⁾ Amounts include other adjustments made in conjunction with the adoption of Topic 842.

Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability


	June 30, 2020		December 31, 2019
Trade and client receivables, net of allowance	$	33,230	$	30,156
Contract liabilities
Deferred revenue	14,984		13,799
Deferred revenue (component of other liabilities, noncurrent)	3,552		3,153

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Financial Liabilities Measured at Fair Value on a Recurring Basis

The following tables set forth the fair value of the Company’s financial assets measured at fair value on a recurring basis based on the three-tier fair value hierarchy (in thousands):


	June 30, 2020
	Level I		Level II		Level III		Total

Cash equivalents—money market funds	$	59,832	$	—	$	—	$	59,832

Marketable securities
Commercial paper	—		44,876		—		44,876

U.S. government securities	24,730		—		—		24,730
Total financial assets	$	84,562	$	44,876	$	—	$	129,438


	December 31, 2019
	Level I		Level II		Level III		Total
Cash equivalents—money market funds	$	35,286	$	—	$	—	$	35,286
Marketable securities
Commercial paper	—		50,794		—		50,794
U.S. government securities	34,687		—		—		34,687
Total financial assets	$	69,973	$	50,794	$	—	$	120,767

Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Cash and Cash Equivalents


	June 30, 2020		December 31, 2019
Cash and cash equivalents	$	76,755	$	48,392
Restricted cash	2,740		2,490
Funds held in escrow, including funds in transit	129,553		108,721
Total cash, cash equivalents, and restricted cash as shown in the condensed consolidated statement of cash flows	$	209,048	$	159,603

Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):


	June 30, 2020		December 31, 2019
Computer equipment and software	$	4,664	$	3,613
Internal-use software and platform development	16,027		12,726
Leasehold improvements	14,597		10,576
Office furniture and fixtures	3,354		2,454
Total property and equipment	38,642		29,369
Less: accumulated depreciation	(11,358)		(7,915)
Property and equipment, net	$	27,284	$	21,454

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):


	June 30, 2020		December 31, 2019
Accrued compensation and related benefits	$	7,245	$	5,344
Accrued freelancer costs	1,552		622
Accrued indirect taxes	2,044		2,401
Accrued vendor expenses	9,720		5,485
Accrued payment processing fees	837		832
Operating lease liability, current	3,053		3,214
Other	913		444
Total accrued expenses and other current liabilities	$	25,364	$	18,342

Debt (Tables)

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Summary of Carrying Value of Debt

The following table presents the carrying value of the Company’s debt obligations as of June 30, 2020 and December 31, 2019 (in thousands):


	June 30, 2020			December 31, 2019
First Term Loan—18 months of interest-only payments ended in March 2019 followed by 36 equal monthly installments of principal plus interest, maturing March 2022; interest at prime plus 0.25% per annum	$	8,750		$	11,250
Second Term Loan—17 months of interest-only payments ended in March 2019 followed by 42 equal monthly installments of principal plus interest, maturing September 2022; interest at prime plus 0.25% per annum	5,785			7,071

Total debt	14,535			18,321
Less: unamortized debt discount issuance costs	(12)			(38)
Balance	14,523			18,283
Debt, current	(7,594)			(7,584)
Debt, noncurrent	$	6,929		$	10,699
Weighted-average interest rate	4.99		%	6.93		%

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 505
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 835
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-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 942
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
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-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders

The following table sets forth the computation of the Company’s basic and diluted net loss per share for the periods presented (in thousands, except share and per share data):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Numerator:
Net loss	$	(11,024)	$	(2,451)	$	(21,045)	$	(7,611)


Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted	116,523,570		108,683,099		115,321,264		107,665,492

Net loss per share, basic and diluted	$	(0.09)	$	(0.02)	$	(0.18)	$	(0.07)

Schedule of Potentially Dilutive Shares Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders

The following potentially dilutive shares were excluded from the computation of diluted net loss per share because including them would have been anti-dilutive:


	As of June 30,
	2020	2019
Options to purchase common stock	9,878,333	19,771,277
Common stock issuable upon exercise of common stock warrants	450,000	500,000
Common stock issuable upon vesting of restricted stock units	6,191,541	1,213,337
Common stock issuable in connection with employee stock purchase plan	964,974	802,389
Total	17,484,848	22,287,003

Segment and Geographical Information (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Revenue by Type of Service

The following table sets forth total revenue by type of service for the periods presented (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Marketplace	$	78,464	$	65,728	$	153,246	$	126,183
Managed services	9,067		8,055		17,481		16,076
Total revenue	$	87,531	$	73,783	$	170,727	$	142,259

Revenue by Geographic Area Based on Billing Address of Freelancers and Clients

The following table sets forth total revenue by geographic area based on the billing address of its freelancers and clients for the periods presented (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Freelancers
United States	$	14,300	$	12,360	$	28,297	$	24,129
India	7,879		6,834		15,352		13,398
Philippines	5,304		4,880		10,441		9,411
Rest of world	25,833		22,360		50,188		43,838
Total freelancers	53,316		46,434		104,278		90,776
Clients
United States	24,354		21,431		47,313		39,105
Rest of world	9,861		5,918		19,136		12,378
Total clients	34,215		27,349		66,449		51,483
Total revenue	$	87,531	$	73,783	$	170,727	$	142,259

Description of Business (Details)	12 Months Ended
Description of Business (Details)	Dec. 31, 2015 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating platforms consolidated	2

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 87,531	$ 73,783	$ 170,727	$ 142,259
General and administrative	17,102	14,064	34,926	29,725
Net loss	$ (11,024)	$ (2,451)	$ (21,045)	$ (7,611)
Net loss per share, basic and diluted (in dollars per share)	$ (0.09)	$ (0.02)	$ (0.18)	$ (0.07)
Net loss			$ (21,045)	$ (7,611)
Amortization of operating lease asset			1,945	2,177
Trade and client receivables			4,773	29,978
Prepaid expenses and other assets			968	585
Operating lease liability			(925)	(998)
Accrued expenses and other liabilities			7,232	(2,088)
Deferred revenue			(1,585)	(1,317)
Investing activities—decrease (increase) in restricted cash				0
Financing activities—changes in funds held in escrow, including funds in transit				0
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH			49,445	(42,070)
Cash, cash equivalents, and restricted cash—beginning of period			159,603	230,067
Cash, cash equivalents, and restricted cash—end of period	$ 209,048	$ 187,997	$ 209,048	187,997
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		74,256		143,180
General and administrative		14,113		29,790
Net loss		(2,027)		$ (6,755)
Net loss per share, basic and diluted (in dollars per share)				$ (0.06)
Net loss				$ (6,755)
Amortization of operating lease asset				0
Trade and client receivables				30,288
Prepaid expenses and other assets				701
Operating lease liability				0
Accrued expenses and other liabilities				(430)
Deferred revenue				(408)
Investing activities—decrease (increase) in restricted cash				150
Financing activities—changes in funds held in escrow, including funds in transit				(20,116)
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH				(62,036)
Cash, cash equivalents, and restricted cash—beginning of period				129,128
Cash, cash equivalents, and restricted cash—end of period		67,092		67,092
Restatement Adjustment \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		(473)		(921)
General and administrative		0		0
Net loss		(473)		$ (921)
Net loss per share, basic and diluted (in dollars per share)				$ (0.01)
Net loss				$ (921)
Amortization of operating lease asset				0
Trade and client receivables				(310)
Prepaid expenses and other assets				0
Operating lease liability				0
Accrued expenses and other liabilities				(298)
Deferred revenue				(909)
Investing activities—decrease (increase) in restricted cash				0
Financing activities—changes in funds held in escrow, including funds in transit				0
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH				0
Cash, cash equivalents, and restricted cash—beginning of period				0
Cash, cash equivalents, and restricted cash—end of period		0		0
Restatement Adjustment \| Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
General and administrative		(49)		(65)
Net loss		49		$ 65
Net loss per share, basic and diluted (in dollars per share)				$ 0
Net loss				$ 65
Amortization of operating lease asset				2,177
Trade and client receivables				0
Prepaid expenses and other assets				(116)
Operating lease liability				998
Accrued expenses and other liabilities				(1,360)
Deferred revenue				0
Investing activities—decrease (increase) in restricted cash				0
Financing activities—changes in funds held in escrow, including funds in transit				0
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH				0
Cash, cash equivalents, and restricted cash—beginning of period				0
Cash, cash equivalents, and restricted cash—end of period		0		0
Restatement Adjustment \| Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
General and administrative		0		0
Net loss		0		$ 0
Net loss per share, basic and diluted (in dollars per share)				$ 0
Net loss				$ 0
Amortization of operating lease asset				0
Trade and client receivables				0
Prepaid expenses and other assets				0
Operating lease liability				0
Accrued expenses and other liabilities				0
Deferred revenue				0
Investing activities—decrease (increase) in restricted cash				(150)
Financing activities—changes in funds held in escrow, including funds in transit				20,116
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH				19,966
Cash, cash equivalents, and restricted cash—beginning of period				100,939
Cash, cash equivalents, and restricted cash—end of period		$ 120,905		$ 120,905

Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 18.5		$ 18.5
Contract with customer, liability, revenue recognized	4.9	$ 3.6	8.0	$ 6.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 15.0		$ 15.0
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months		12 months

Revenue - Contract Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Trade and client receivables, net of allowance	$ 33,230	$ 30,156
Deferred revenue	14,984	13,799
Deferred revenue (component of other liabilities, noncurrent)	3,552	3,153
Calculated under Revenue Guidance in Effect before Topic 606
Disaggregation of Revenue [Line Items]
Trade and client receivables, net of allowance	$ 33,230	$ 30,156

Fair Value Measurements - Financial Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	$ 129,438	$ 120,767
Total debt	14,535	18,321
Cash equivalents—money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	59,832	35,286
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	44,876	50,794
U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	24,730	34,687
Level I
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	84,562	69,973
Level I \| Cash equivalents—money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	59,832	35,286
Level I \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Level I \| U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	24,730	34,687
Level II
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	44,876	50,794
Level II \| Cash equivalents—money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level II \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	44,876	50,794
Level II \| U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Level III
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Level III \| Cash equivalents—money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level III \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Level III \| U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 0	$ 0

Balance Sheet Components - Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Cash and cash equivalents	$ 76,755	$ 48,392
Restricted cash	2,740	2,490
Funds held in escrow, including funds in transit	129,553	108,721
Total cash, cash equivalents, and restricted cash as shown in the condensed consolidated statement of cash flows	$ 209,048	$ 159,603	$ 187,997	$ 230,067

Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 38,642		$ 38,642		$ 29,369
Less: accumulated depreciation	(11,358)		(11,358)		(7,915)
Property and equipment, net	27,284		27,284		21,454
Depreciation expense	800	$ 600	1,500	$ 1,400
Capitalized internal-use software and platform development costs	1,700	$ 1,400	3,300	$ 2,500
Amortization of internal-use software and platform development costs	1,100		2,000
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	4,664		4,664		3,613
Internal-use software and platform development
Property, Plant and Equipment [Line Items]
Total property and equipment	16,027		16,027		12,726
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	14,597		14,597		10,576
Office furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 3,354		$ 3,354		$ 2,454

Balance Sheet Components - Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Amortization expense of intangible assets	$ 0.7	$ 0.7	$ 1.3	$ 1.3

Balance Sheet Components - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Accrued compensation and related benefits	$ 7,245	$ 5,344
Accrued freelancer costs	1,552	622
Accrued indirect taxes	2,044	2,401
Accrued vendor expenses	9,720	5,485
Accrued payment processing fees	837	832
Operating lease liability, current	3,053	3,214
Other	913	444
Total accrued expenses and other current liabilities	25,364	$ 18,342
Organization Structure Updates
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	$ 1,600

Balance Sheet Components - Operating Leases (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Jan. 01, 2020 USD ($) floor	Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Operating lease asset	$ 21,645		$ 21,908
Building Floor
Property, Plant and Equipment [Line Items]
Number of additional floors \| floor		1
Operating lease asset		$ 1,700
Operating lease liability		$ 1,700
Term of contract	5 years
Renewal term	5 years
Total minimum lease payments	$ 2,100

Commitments and Contingencies - Letters of Credit (Details) $ in Millions	Jun. 30, 2020 USD ($) letter	Dec. 31, 2019 USD ($) letter
Commitments and Contingencies Disclosure [Abstract]
Letters of credit held \| letter	3	3
Letters of credit outstanding \| $	$ 1.0	$ 0.8

Debt - Summary of Carrying Value of Debt (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($) installment	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Total debt	$ 14,535	$ 18,321
Less: unamortized debt discount issuance costs	(12)	(38)
Balance	14,523	18,283
Debt, current	(7,594)	(7,584)
Debt, noncurrent	$ 6,929	$ 10,699
Weighted-average interest rate	4.99%	6.93%
First Term Loan
Debt Instrument [Line Items]
Total debt	$ 8,750	$ 11,250
Interest only payments term	18 months
Number of equal monthly installments of principal and interest \| installment	36
First Term Loan \| Prime Rate
Debt Instrument [Line Items]
Debt, variable rate	0.25%
Second Term Loan
Debt Instrument [Line Items]
Total debt	$ 5,785	$ 7,071
Interest only payments term	17 months
Number of equal monthly installments of principal and interest \| installment	42
Second Term Loan \| Prime Rate
Debt Instrument [Line Items]
Debt, variable rate	0.25%

Debt - Additional Information (Details)	1 Months Ended		3 Months Ended		6 Months Ended
Debt - Additional Information (Details)	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity (up to)			$ 49,000,000.0		$ 49,000,000.0
Adjusted quick ratio					1.75
Proceeds from borrowings on debt	$ 3,000,000.0	$ 15,000,000.0			$ 18,000,000	$ 50,000,000
Repayment of debt					21,786,000	26,893,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity (up to)			25,000,000.0		25,000,000.0
First Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount			15,000,000.0		15,000,000.0
Repayment of debt			1,300,000	$ 1,300,000	2,500,000	1,300,000
Second Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount			9,000,000.0		9,000,000.0
Repayment of debt			$ 600,000	$ 600,000	$ 1,300,000	$ 600,000

Net Loss per Share - Summary of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net loss	$ (11,024)	$ (2,451)	$ (21,045)	$ (7,611)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	116,523,570	108,683,099	115,321,264	107,665,492
Net loss per share, basic and diluted (in dollars per share)	$ (0.09)	$ (0.02)	$ (0.18)	$ (0.07)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Net Loss per Share - Schedule of Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - shares	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net loss per share attributable to common stockholders (in shares)	17,484,848	22,287,003
Options to Purchase Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net loss per share attributable to common stockholders (in shares)	9,878,333	19,771,277
Common Stock Issuable upon Exercise of Common Stock Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net loss per share attributable to common stockholders (in shares)	450,000	500,000
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net loss per share attributable to common stockholders (in shares)	6,191,541	1,213,337
Employee Stock Purchase Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net loss per share attributable to common stockholders (in shares)	964,974	802,389

Segment and Geographical Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2020 segment
Segment Reporting [Abstract]
Number of operating segments	1
Number of reportable segments	1

Segment and Geographical Information - Revenue by Type of Service (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 87,531	$ 73,783	$ 170,727	$ 142,259
Marketplace
Disaggregation of Revenue [Line Items]
Revenue	78,464	65,728	153,246	126,183
Managed services
Disaggregation of Revenue [Line Items]
Revenue	$ 9,067	$ 8,055	$ 17,481	$ 16,076

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Segment and Geographical Information - Revenue by Geographic Area Based on Billing Address of Freelancers and Clients (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 87,531	$ 73,783	$ 170,727	$ 142,259
Freelancers
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	53,316	46,434	104,278	90,776
Freelancers \| United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	14,300	12,360	28,297	24,129
Freelancers \| India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	7,879	6,834	15,352	13,398
Freelancers \| Philippines
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	5,304	4,880	10,441	9,411
Freelancers \| Rest of world
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	25,833	22,360	50,188	43,838
Clients
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	34,215	27,349	66,449	51,483
Clients \| United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	24,354	21,431	47,313	39,105
Clients \| Rest of world
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 9,861	$ 5,918	$ 19,136	$ 12,378

- Definition

+ References

+ Details