Eventbrite (EB) 10-Q 7 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 15, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Registrant Name	Eventbrite, Inc.
Entity Central Index Key	0001475115
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Small Business	false
Current Fiscal Year End Date	--12-31
Entity Shell Company	false
Entity Current Reporting Status	Yes
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		49,662,496
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		33,170,832

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 500,454	$ 437,892
Funds receivable	46,582	58,697
Accounts receivable, net	4,368	4,069
Creator signing fees, net	8,245	7,324
Creator advances, net	26,182	21,255
Prepaid expenses and other current assets	14,735	16,467
Total current assets	600,566	545,704
Property, plant and equipment, net	46,251	44,219
Goodwill	170,560	170,560
Acquired intangible assets, net	54,490	59,973
Restricted cash	508	1,508
Creator signing fees, noncurrent	12,518	9,681
Creator advances, noncurrent	2,534	1,887
Other assets	3,244	3,352
Total assets	890,671	836,884
Current liabilities
Accounts payable, creators	322,982	272,201
Accounts payable, trade	2,063	1,028
Accrued compensation and benefits	5,278	5,586
Accrued taxes	4,503	8,028
Current portion of term loan	5,650	5,635
Other accrued liabilities	18,519	15,726
Total current liabilities	358,995	308,204
Build-to-suit lease financing obligation	27,916	28,510
Accrued taxes, noncurrent	13,612	15,691
Term loan	55,794	67,087
Other liabilities	2,521	2,170
Total liabilities	458,838	421,662
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.00001 par value; 100,000,000 shares authorized, no shares issued or outstanding as of June 30, 2019 and December 31, 2018	0	0
Common stock, $0.00001 par value; 1,100,000,000 shares authorized, 82,449,552 shares issued and outstanding as of June 30, 2019; 1,100,000,000 shares authorized, 78,546,874 shares issued and 78,358,394 shares outstanding as of December 31, 2018	0	0
Treasury stock at cost; no shares as of June 30, 2019 and 188,480 shares as of December 31, 2018	0	(488)
Additional paid-in capital	759,959	718,405
Accumulated deficit	(328,126)	(302,695)
Total stockholders’ equity	431,833	415,222
Total liabilities and stockholders’ equity	$ 890,671	$ 836,884

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	1,100,000,000	1,100,000,000
Common stock, shares issued (in shares)	82,449,552	78,546,874
Common stock, shares outstanding (in shares)	82,449,552	78,358,394
Treasury stock (in shares)	0	188,480

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net revenue		$ 80,758,000	$ 67,542,000	$ 162,084,000	$ 142,068,000
Cost of net revenue	[1]	31,073,000	29,863,000	61,591,000	57,947,000
Gross profit		49,685,000	37,679,000	100,493,000	84,121,000
Operating expenses:
Product development	[1]	16,295,000	10,981,000	30,559,000	19,815,000
Sales, marketing and support	[1]	25,872,000	21,513,000	47,434,000	42,229,000
General and administrative	[1]	22,051,000	18,405,000	47,178,000	38,388,000
Total operating expenses	[1]	64,218,000	50,899,000	125,171,000	100,432,000
Loss from operations		(14,533,000)	(13,220,000)	(24,678,000)	(16,311,000)
Interest expense		(1,868,000)	(3,190,000)	(3,801,000)	(6,099,000)
Change in fair value of redeemable convertible preferred stock warrant liability		0	(4,750,000)	0	(6,071,000)
Gain on debt extinguishment		0	0	0	16,995,000
Other income (expense), net		375,000	(3,013,000)	2,555,000	(3,294,000)
Loss before income taxes		(16,026,000)	(24,173,000)	(25,924,000)	(14,780,000)
Income tax provision (benefit)		(1,193,000)	430,000	(1,093,000)	800,000
Net loss		$ (14,833,000)	$ (24,603,000)	$ (24,831,000)	$ (15,580,000)
Net loss per share, basic and diluted (in dollars per share)		$ (0.18)	$ (1.12)	$ (0.31)	$ (0.73)
Weighted-average number of shares outstanding used to compute net loss per share attributable to common stockholders, basic and diluted (in shares)		81,369	21,886	80,049	21,289
Stock-based compensation expense		$ 8,706,000	$ 5,248,000	$ 16,833,000	$ 8,108,000
Cost of net revenue
Operating expenses:
Stock-based compensation expense		325,000	71,000	569,000	124,000
Product development
Operating expenses:
Stock-based compensation expense		2,187,000	747,000	4,225,000	1,348,000
Sales, marketing and support
Operating expenses:
Stock-based compensation expense		1,246,000	864,000	2,469,000	1,578,000
General and administrative
Operating expenses:
Stock-based compensation expense		$ 4,948,000	$ 3,566,000	$ 9,570,000	$ 5,058,000
[1]	(1) Includes stock-based compensation as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017Cost of net revenue$325 $71 $569 $124Product development2,187 747 4,225 1,348Sales, marketing and support1,246 864 2,469 1,578General and administrative4,948 3,566 9,570 5,058

Consolidated Statements of Rede

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Common StockClass A Common Stock	Common StockClass B Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit
Shares outstanding, beginning of period (in shares) at Dec. 31, 2017		0	20,773,441	(188,480)
Beginning balance at Dec. 31, 2017	$ (155,814)	$ 0	$ 0	$ (488)	$ 83,291	$ (238,617)
Redeemable convertible preferred stock, beginning of period (in shares) at Dec. 31, 2017	41,628,207
Redeemable convertible preferred stock, beginning of period at Dec. 31, 2017	$ 334,018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			124,258
Issuance of common stock upon exercise of stock options	588				588
Vesting of early exercised stock options	92				92
Stock-based compensation	3,016				3,016
Net loss	9,023					9,023
Shares outstanding, end of period (in shares) at Mar. 31, 2018		0	20,897,699	(188,480)
Ending balance at Mar. 31, 2018	$ (143,095)	$ 0	$ 0	$ (488)	86,987	(229,594)
Redeemable convertible preferred stock, end of period (in shares) at Mar. 31, 2018	41,628,207
Redeemable convertible preferred stock, end of period at Mar. 31, 2018	$ 334,018
Shares outstanding, beginning of period (in shares) at Dec. 31, 2017		0	20,773,441	(188,480)
Beginning balance at Dec. 31, 2017	$ (155,814)	$ 0	$ 0	$ (488)	83,291	(238,617)
Redeemable convertible preferred stock, beginning of period (in shares) at Dec. 31, 2017	41,628,207
Redeemable convertible preferred stock, beginning of period at Dec. 31, 2017	$ 334,018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(15,580)
Shares outstanding, end of period (in shares) at Jun. 30, 2018		0	22,537,056	(188,480)
Ending balance at Jun. 30, 2018	$ (151,183)	$ 0	$ 0	$ (488)	103,502	(254,197)
Redeemable convertible preferred stock, end of period (in shares) at Jun. 30, 2018	41,628,207
Redeemable convertible preferred stock, end of period at Jun. 30, 2018	$ 334,018
Shares outstanding, beginning of period (in shares) at Mar. 31, 2018		0	20,897,699	(188,480)
Beginning balance at Mar. 31, 2018	$ (143,095)	$ 0	$ 0	$ (488)	86,987	(229,594)
Redeemable convertible preferred stock, beginning of period (in shares) at Mar. 31, 2018	41,628,207
Redeemable convertible preferred stock, beginning of period at Mar. 31, 2018	$ 334,018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			963,297
Issuance of common stock upon exercise of stock options	3,620				3,620
Vesting of early exercised stock options	91				91
Stock-based compensation	5,365				5,365
Net loss	(24,603)					(24,603)
Issuance of common stock in acquisitions (in shares)			676,060
Issuance of common stock for acquisitions	7,439				7,439
Shares outstanding, end of period (in shares) at Jun. 30, 2018		0	22,537,056	(188,480)
Ending balance at Jun. 30, 2018	$ (151,183)	$ 0	$ 0	$ (488)	103,502	(254,197)
Redeemable convertible preferred stock, end of period (in shares) at Jun. 30, 2018	41,628,207
Redeemable convertible preferred stock, end of period at Jun. 30, 2018	$ 334,018
Shares outstanding, beginning of period (in shares) at Dec. 31, 2018		11,502,993	66,855,401	(188,480)
Beginning balance at Dec. 31, 2018	415,222	$ 0	$ 0	$ (488)	718,405	(302,695)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		1,785,106	249,207
Issuance of common stock upon exercise of stock options	12,427				12,427
Issuance of restricted stock awards (in shares)		4,402
Issuance of common stock for settlement of RSUs (in shares)		62,263
Shares withheld related to net share settlement (in shares)		(24,249)
Shares withheld related to net share settlement	(560)				(560)
Conversion of common stock from Class B to A (in shares)		21,095,075	(21,095,075)
Conversion of common stock from Class B to A	0
Retirement of treasury stock (in shares)				188,480
Retirement of treasury stock				$ 488	(488)
Vesting of early exercised stock options	92				92
Stock-based compensation	8,330				8,330
Net loss	(9,998)					(9,998)
Shares outstanding, end of period (in shares) at Mar. 31, 2019		34,425,590	46,009,533	0
Ending balance at Mar. 31, 2019	424,913	$ 0	$ 0	$ 0	738,206	(313,293)
Shares outstanding, beginning of period (in shares) at Dec. 31, 2018		11,502,993	66,855,401	(188,480)
Beginning balance at Dec. 31, 2018	$ 415,222	$ 0	$ 0	$ (488)	718,405	(302,695)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	3,819,674
Net loss	$ (24,831)
Shares outstanding, end of period (in shares) at Jun. 30, 2019		47,931,474	34,518,078	0
Ending balance at Jun. 30, 2019	431,833	$ 0	$ 0	$ 0	759,959	(328,126)
Shares outstanding, beginning of period (in shares) at Mar. 31, 2019		34,425,590	46,009,533	0
Beginning balance at Mar. 31, 2019	424,913	$ 0	$ 0	$ 0	738,206	(313,293)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		1,785,361
Issuance of common stock upon exercise of stock options	10,526				10,526
Issuance of restricted stock awards (in shares)		21,016
Issuance of common stock for settlement of RSUs (in shares)		52,204
Shares withheld related to net share settlement (in shares)		(11,858)
Shares withheld related to net share settlement	(253)				(253)
Conversion of common stock from Class B to A (in shares)		11,491,455	(11,491,455)
Conversion of common stock from Class B to A	0
Vesting of early exercised stock options	92				92
Stock-based compensation	9,154				9,154
Net loss	(14,833)					(14,833)
Issuance of common stock for ESPP Purchase (in shares)		167,706
Issuance of common stock for ESPP Purchase	2,234				2,234
Shares outstanding, end of period (in shares) at Jun. 30, 2019		47,931,474	34,518,078	0
Ending balance at Jun. 30, 2019	$ 431,833	$ 0	$ 0	$ 0	$ 759,959	$ (328,126)

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net loss	$ (14,833,000)	$ (24,603,000)	$ (24,831,000)	$ (15,580,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	6,082,000	8,580,000	12,219,000	16,782,000
Amortization of creator signing fees	2,522,000	1,713,000	4,915,000	3,077,000
Accretion of term loan	119,000	882,000	223,000	1,412,000
Gain on debt extinguishment	0	0	0	(16,995,000)
Change in fair value of redeemable convertible preferred stock warrant liability	0	4,750,000	0	6,071,000
Stock-based compensation	8,706,000	5,248,000	16,833,000	8,108,000
Impairment of long-lived assets	1,436,000	686,000	1,899,000	1,064,000
Provision for bad debt and creator advances	1,800,000	914,000	2,380,000	1,533,000
Loss on disposal of equipment	36,000	0	58,000	1,000
Deferred income taxes	(571,000)	341,000	(745,000)	617,000
Changes in operating assets and liabilities, net of impact of acquisitions:
Accounts receivable	446,000	78,000	(1,061,000)	(946,000)
Funds receivable	7,813,000	8,892,000	12,115,000	14,778,000
Creator signing fees, net	(4,630,000)	(2,626,000)	(9,251,000)	(6,277,000)
Creator advances, net	(4,393,000)	30,000	(8,513,000)	(2,517,000)
Prepaid expenses and other current assets	1,033,000	(2,102,000)	1,732,000	(3,430,000)
Other assets	(119,000)	(788,000)	(2,000)	(694,000)
Accounts payable, creators	(30,407,000)	(42,245,000)	50,781,000	29,946,000
Accounts payable, trade	671,000	(597,000)	956,000	411,000
Accrued compensation and benefits	(1,879,000)	(80,000)	(308,000)	(596,000)
Accrued taxes	(2,194,000)	746,000	(3,525,000)	2,243,000
Other accrued liabilities	501,000	4,741,000	2,712,000	9,385,000
Accrued taxes, non-current	(1,361,000)	(1,853,000)	(1,334,000)	640,000
Other liabilities	220,000	(14,000)	479,000	(34,000)
Net cash provided by (used in) operating activities	(29,002,000)	(37,307,000)	57,732,000	48,999,000
Cash flows from investing activities
Purchases of property and equipment	(2,281,000)	(2,035,000)	(3,566,000)	(2,688,000)
Capitalized internal-use software development costs	(2,166,000)	(1,992,000)	(4,271,000)	(4,331,000)
Acquisitions, net of cash acquired	0	13,853,000	0	13,853,000
Net cash provided by (used in) investing activities	(4,447,000)	9,826,000	(7,837,000)	6,834,000
Cash flows from financing activities
Proceeds from issuance of common stock under ESPP	2,234,000	0	2,234,000	0
Proceeds from exercise of stock options	10,526,000	3,620,000	22,954,000	4,208,000
Taxes paid related to net share settlement of equity awards	(531,000)	0	(706,000)	0
Proceeds from term loans	0	15,000,000	0	45,000,000
Principal payments on debt obligations	(11,406,000)	(165,000)	(11,406,000)	(35,455,000)
Payment of debt issuance costs	0	0	(457,000)	0
Payments on capital lease obligations	(68,000)	(30,000)	(138,000)	(76,000)
Payments on lease financing obligations	(217,000)	(155,000)	(401,000)	(279,000)
Payments of deferred offering costs	0	(183,000)	(413,000)	(183,000)
Net cash provided by financing activities	538,000	18,087,000	11,667,000	13,215,000
Net increase (decrease) in cash, cash equivalents and restricted cash	(32,911,000)	(9,394,000)	61,562,000	69,048,000
Cash, cash equivalents and restricted cash
Beginning of period	533,873,000	270,663,000	439,400,000	192,221,000
End of period	500,962,000	261,269,000	500,962,000	261,269,000
Supplemental cash flow data
Interest paid	1,866,000	1,686,000	1,876,000	3,622,000
Income taxes paid, net of refunds	183,000	100,000	367,000	143,000
Non-cash investing and financing activities
Vesting of early exercised stock options	92,000	91,000	184,000	183,000
Purchases of property and equipment, accrued but unpaid	338,000	8,000	338,000	8,000
Issuance of shares of common stock for acquisitions	0	7,439,000	0	7,439,000
Issuance of redeemable convertible preferred stock warrants in connection with loan facilities and term loan	0	1,890,000	0	4,603,000
Deferred offering costs included in accounts payable, trade and other accrued liabilities	$ 0	$ 1,071,000	$ 0	$ 1,128,000

Organization

Organization	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Description of Business Eventbrite, Inc. (Eventbrite or the Company) has built a powerful, broad technology platform to enable creators to solve many challenges associated with creating live experiences. The Company’s platform integrates components needed to seamlessly plan, promote and produce live events, thereby allowing creators to reduce friction and costs, increase reach and drive ticket sales. Initial Public Offering In September 2018, the Company completed its initial public offering (IPO) in which the Company issued and sold 11,500,000 shares of Class A common stock at a public offering price of $23.00 per share, which included 1,500,000 shares sold pursuant to the exercise by the underwriters' option to purchase additional shares. The Company received aggregate net proceeds of $246.0 million from the IPO, net of underwriter discounts and commissions, before deducting additional offering costs of $5.5 million , net of reimbursements. Immediately prior to the closing of the IPO, (i) all shares of common stock then outstanding were reclassified as Class B common stock, (ii) 41,628,207 shares of redeemable convertible preferred stock outstanding converted into 42,188,624 shares of Class B common stock (including additional shares issued upon conversion of our Series G redeemable convertible preferred stock based on the IPO price of $23.00 per share) and (iii) warrants to purchase 933,269 shares of our Series G redeemable convertible preferred stock automatically exercised into 997,193 shares of Class B common stock.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Basis of Presentation The accompanying interim condensed consolidated financial statements of the Company are unaudited. The interim unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and the applicable rules and regulations of the Securities and Exchange Commission (SEC) for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated balance sheet as of December 31, 2018 included herein was derived from the audited financial statements as of that date. The accompanying interim unaudited condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and, in the opinion of management, reflect all adjustments of a normal and recurring nature considered necessary to state fairly the Company's consolidated financial position, results of operations and cash flows for the interim periods. All intercompany transactions and balances have been eliminated. The interim results for the three and six months ended June 30, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 or for any other future annual or interim period. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with "Management's Discussion and Analysis of Financial Condition and Results of Operations," "Quantitative and Qualitative Disclosures About Market Risk" and the Consolidated Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 (2018 Form 10-K). Prior Period Reclassification Beginning in the first quarter of 2019, the Company classified the amortization of acquired customer relationship intangible assets and certain other costs as sales, marketing and support expenses. Previously, these expenses were classified as general and administrative expenses. The Company has reclassified $3.4 million and $6.6 million of expenses for the three and six months ended June 30, 2018 , respectively, and $0.4 million for the three months ended March 31, 2019 which is included in the six months ended June 30, 2019, to make the presentation consistent with the current period. There was no change to total operating expenses, loss from operations, loss before provision for income taxes or net loss for the three or six months ended June 30, 2018 or the three months ended March 31, 2019 as a result of these reclassifications. Use of Estimates In order to conform with U.S. GAAP, the Company is required to make certain estimates, judgments and assumptions when preparing its condensed consolidated financial statements. These estimates, judgments and assumptions affect the reported assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reported periods. These estimates include, but are not limited to, the recoverability of creator signing fees and creator advances, the capitalization and estimated useful life of internal-use software, certain assumptions used in the valuation of equity awards, assumptions used in determining the fair value of the redeemable convertible preferred stock warrant liability and term loan derivative asset, assumptions used in determining the fair value of business combinations, the allowance for doubtful accounts, indirect tax reserves and contra revenue amounts related to fraudulent events, customer disputed transactions and refunds. The Company evaluates these estimates on an ongoing basis. Actual results could differ from those estimates and such differences could be material to the Company’s consolidated financial statements. Comprehensive Loss For all periods presented, comprehensive loss equaled net loss. Therefore, the condensed consolidated statements of comprehensive loss have been omitted from the interim unaudited condensed consolidated financial statements. Emerging Growth Company Status As an emerging growth company (EGC), the Jump-start Our Business Start-ups Act (JOBS Act) allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to use this extended transition period under the JOBS Act. As a result, the Company's financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective dates for new or revised accounting standards that are applicable to public companies. Based on the market value of our Class A common stock held by non-affiliates as of June 30, 2019, we will become a large accelerated filer as of December 31, 2019 and cease to be an emerging growth company, and, therefore, will no longer be able to take advantage of this extended transition period. Recently Adopted Accounting Pronouncements The Company adopted ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business beginning January 1, 2019. This standard clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The adoption of this standard has had no material impact on the Company's interim condensed consolidated financial statements. In May 2014, and in subsequent updates, the Financial Accounting Standards Board (FASB) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and Other Assets and Deferred Costs—Contracts with Customers (Subtopic 340-40) (ASC Topic 606), which supersedes nearly all existing revenue recognition guidance. ASC Topic 606 establishes a five-step revenue recognition process in which an entity will recognize revenue when or as it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. ASC Topic 606 also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenues and cash flows from contracts with customers. ASC Topic 606 was effective for and adopted by the Company beginning January 1, 2019. The Company applied the modified retrospective approach to contracts which were not completed as of the adoption date. The adoption of ASC Topic 606 primarily had the following impact on the Company's financial statements: ▪ Beginning January 1, 2019, the Company recognizes revenue allocated to its customer service and account management performance obligations over time as the Company has a stand-ready obligation to provide these services to certain customers. The Company recorded a cumulative-effect adjustment to opening accumulated deficit as of January 1, 2019 of $0.6 million and a corresponding increase to contract liabilities, included within other accrued liabilities on the interim condensed consolidated balance sheet. ▪ The adoption of ASC Topic 606 had no material impact to the Company's net revenues recorded in the three or six months ended June 30, 2019 . ▪ The accounting treatment of incremental costs of obtaining contracts under ASC Topic 606 had no material impact to the Company's interim unaudited condensed consolidated financial statements. ▪ The adoption of ASC Topic 606 had no impact to the Company's total net cash provided by or used in operating, investing or financing activities within the Company's interim condensed consolidated statement of cash flows for the three or six months ended June 30, 2019 . Refer to Revenue Recognition below for additional discussion of the Company's revenue recognition policies under ASC Topic 606. Recently Issued Accounting Pronouncements Not Yet Adopted In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350) : Simplifying the Test for Goodwill Impairment , which eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. This standard is effective for the annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. This standard will apply to the Company’s reporting requirements in performing goodwill impairment testing, however, the Company does not anticipate the adoption of this standard will have a material impact on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02) which requires lessees to put most leases on their balance sheets but recognize expenses on their income statement and eliminates the real estate-specific provisions for all entities. The guidance is effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the effect that implementation of this standard will have on its consolidated financial statements upon adoption. Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents includes bank deposits held by financial institutions. Cash and cash equivalents balances include the face value of tickets sold on behalf of creators and their share of service charges, which amounts are to be remitted to the creators. Such balances were $279.5 million and $217.4 million as of June 30, 2019 and December 31, 2018 , respectively. Although creator cash is legally unrestricted, the Company does not utilize creator cash for its own financing or investing activities as the amounts are payable to creators on a regular basis. These amounts due to creators are included in accounts payable, creators on the condensed consolidated balance sheets. The Company has issued letters of credit under lease agreements and other agreements, which have been collateralized with cash. This cash is classified as noncurrent restricted cash on the condensed consolidated balance sheets. The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the condensed consolidated balance sheets that sum to the total of the same amounts shown in the condensed consolidated statements of cash flows (in thousands): June 30, 2019 December 31, 2018 Cash and cash equivalents $ 500,454 $ 437,892 Restricted cash 508 1,508 Total cash, cash equivalents and restricted cash $ 500,962 $ 439,400 Funds Receivable Funds receivable represents cash-in-transit from third-party payment processors that is received by the Company within approximately five business days from the date of the underlying ticketing transaction. The funds receivable balances include the face value of tickets sold on behalf of creators and their share of service charges, which amounts are to be remitted to the creators. Such amounts were $43.5 million and $54.8 million as of June 30, 2019 and December 31, 2018 , respectively. Revenue Recognition The Company determines revenue recognition through the following steps: i. Identification of the contract, or contracts, with a customer ii. Identification of the performance obligations in the contract iii. Determination of the transaction price iv. Allocation of the transaction price to the performance obligations in the contract v. Recognition of revenue when, or as, the Company satisfies a performance obligation The Company derives its revenues primarily from service fees and payment processing fees charged at the time a ticket for an event is sold. The Company also derives revenues from providing certain creators with account management services and customer support. The Company's customers are event creators who are selling tickets for events using the Company's platform. Tickets are sold by creators to attendees. Revenue is recognized when or as control of the promised goods or services is transferred to customers, in an amount that reflects the consideration the Company expects to receive in exchange for those goods or services. The Company allocates the transaction price by estimating a standalone selling price for each performance obligation using an expected cost plus a margin approach. For service fees and payment processing fees, revenue is recognized when the ticket is sold. For account management services and customer support, revenue is recognized over the period from the date of the sale of the ticket to the date of the event. The event creator has the choice of whether to use Eventbrite Payment Processing (EPP) or to use a third-party payment processor, referred to as Facilitated Payment Processing (FPP). Under the EPP option, the Company is the merchant of record and is responsible for processing the transaction and collecting the face value of the ticket and all associated fees at the time the ticket is sold. The Company is also responsible for remitting these amounts collected, less the Company's fees, to the event creator. Under the FPP option, Eventbrite is not responsible for processing the transaction or collecting the face value of the ticket and associated fees. In this case, the Company invoices the creator for all of the Company's fees. The Company evaluates whether it is appropriate to recognize revenue on a gross or net basis based upon its evaluation of whether the Company obtains control of the specified goods or services by considering if it is primarily responsible for fulfillment of the promise, has inventory risk, and has the latitude in establishing pricing and selecting suppliers, among other factors. The Company determined the event creator is the party responsible for fulfilling the promise to the attendee, as the creator is responsible for providing the event for which a ticket is sold, determines the price of the ticket and is responsible for providing a refund if the event is canceled. The Company's service provides a platform for the creator and event attendee to transact and the Company's performance obligation is to facilitate and process that transaction and issue the ticket. The amount that the Company earns for its services is fixed. For the payment processing service, the Company determined that it is the principal in providing the service as the Company is responsible for fulfilling the promise to process the payment and has discretion and latitude in establishing the price of its service. Based on management's assessment, the Company records revenue on a net basis related to its ticketing service and on a gross basis related to its payment processing service. As a result, costs incurred for processing the transactions are included in cost of net revenues in the condensed consolidated statements of operations. Revenue is presented net of indirect taxes, value-added taxes, creator royalties and reserves for customer refunds, payment chargebacks and estimated uncollectible amounts. If an event is cancelled by a creator, then any obligations to provide refunds to event attendees are the responsibility of that creator. If a creator is unwilling or unable to fulfill their refund obligations, the Company may, at its discretion, provide attendee refunds. Revenue is also presented net of the amortization of creator signing fees. The benefit the Company receives by securing exclusive ticketing and payment processing rights with certain creators from creator signing fees is inseparable from the customer relationship with the creator and accordingly these fees are recorded as a reduction of revenue. Significant Accounting Policies Other than as discussed above with respect to the Company's adoption of ASC Topic 606, there have been no material changes to the Company's significant accounting policies as described in the Company's 2018 Form 10-K.

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement The Company measures its financial assets and liabilities at fair value at each reporting date using a fair value hierarchy that requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value: Level 1 – Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 – Other inputs that are directly or indirectly observable in the marketplace. Level 3 – Unobservable inputs that are supported by little or no market activity. The Company’s funds receivable, accounts receivable, accounts payable, other current liabilities and debt approximate their fair value. All of these financial assets and liabilities are Level 1, except for debt, which is Level 2. There are no other Level 1 or Level 2 assets or liabilities recorded at June 30, 2019 and December 31, 2018 . The Company measures the redeemable convertible preferred stock warrant liability (as discussed in Note 11) and term loan derivative asset (as discussed in Note 10) at fair value on a recurring basis and determined these are Level 3 financial assets and liabilities, respectively, in the fair value hierarchy. The fair value of the redeemable convertible preferred stock warrants was estimated using a hybrid between a probability-weighted expected return method (PWERM) and option pricing model (OPM), estimating the probability weighted value across multiple scenarios, while using an OPM to estimate the allocation of value within one or more of these scenarios. Under a PWERM, the value of the Company’s various equity securities was estimated based upon an analysis of future values for the Company assuming various future outcomes, including two IPO scenarios and two scenarios contemplating the continued operation of the Company as a privately held enterprise. Guideline public company multiples were used to value the Company under the IPO scenarios. The discounted cash flow method was used to value the Company under the staying private scenarios. Share value for each class of security was based upon the probability-weighted present value of expected future investment returns, considering each of these possible future outcomes, as well as the rights of each share class. The significant unobservable inputs into the valuation model used to estimate the fair value of the redeemable convertible preferred stock warrants include the timing of potential events (primarily the IPO) and their probability of occurring, the selection of guideline public company multiples, a discount for the lack of marketability of the preferred and common stock, the projected future cash flows, and the discount rate used to calculate the present-value of the estimated equity value allocated to each share class. Generally, changes in the fair value of the underlying redeemable convertible preferred stock would result in a directionally similar impact to the fair value of the redeemable convertible preferred stock warrant liability. The significant unobservable inputs into the valuation model used to estimate the fair value of the term loan derivative asset include the timing of potential events (primarily the IPO), probability of exercise and the discount rate used to calculate the present value of discounted cash flows. There were no transfers of financial assets or liabilities into or out of Level 1, Level 2 or Level 3 for the three and six months ended June 30, 2019 or the year ended December 31, 2018 .

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions In April 2018, the Company acquired Ticketea S.L. (Ticketea), a leading Spanish ticketing provider. The Company acquired Ticketea in order to enhance its ticketing solutions and expand in the Spanish market. The acquisition of Ticketea has been accounted for as a business combination . The acquisition date fair value of the consideration transferred was $11.4 million , which consisted of $3.9 million in cash and 0.7 million shares of the Company’s common stock. Of the 0.7 million shares, 0.1 million shares are being held in escrow for adjustments related to working capital requirements and breaches of representations, warranties and covenants. These escrowed shares will be released approximately 18 months from the acquisition date, net of any adjustments. Acquisition costs related to the Ticketea transaction were $0.5 million and are included in general and administrative expenses in the condensed consolidated statement of operations for the six months ended June 30, 2018 . The total purchase price of the Ticketea acquisition was allocated to the assets acquired and liabilities assumed based on their fair value as of the acquisition date. The excess of the purchase price over the net assets acquired was recorded as goodwill. The goodwill recorded in connection with the Ticketea acquisition is not deductible for tax purposes and is attributable to the assembled workforce and synergies from the future growth and strategic advantages in the ticketing industry. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the respective acquisition dates (in thousands): Ticketea Cash and restricted cash $ 17,852 Funds and accounts receivable 1,058 Creator advances 532 Prepaid expenses and other current assets 94 Property and equipment 42 Other noncurrent assets 28 Accounts payable, creators (19,671 ) Other current liabilities (529 ) Intangible assets 3,094 Goodwill 8,937 Total purchase price $ 11,437 The following table sets forth the components of identifiable intangible assets acquired (in thousands) and their estimated useful lives as of the date of acquisition (in years): Ticketea Estimated Customer relationships $ 2,475 5.0 Developed technology 619 1.0 Total acquired intangible assets $ 3,094

Accounts Receivable, Net

Accounts Receivable, Net	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Accounts Receivable, Net	Accounts Receivable, Net Accounts receivable, net is comprised of invoiced amounts to customers who use FPP for payment processing as well as other invoiced amounts. The following table summarizes the Company’s accounts receivable balance (in thousands): June 30, 2019 December 31, 2018 Accounts receivable, customers $ 6,706 $ 5,651 Allowance for doubtful accounts (2,338 ) (1,582 ) Accounts receivable, net $ 4,368 $ 4,069

Creator Signing Fees, Net

Creator Signing Fees, Net	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Creator Signing Fees, Net	Creator Signing Fees, Net Creator signing fees are additional incentives paid by the Company to secure exclusive ticketing and payment processing rights with certain creators. Amortization of creator signing fees is recorded as a reduction of revenue in the condensed consolidated statements of operations. As of June 30, 2019 , these payments are being amortized over a weighted-average remaining contract life of 3.4 years on a straight-line basis. Creator signing fees that are expected to be amortized within 12 months of the balance sheet date are classified as creator signing fees, net and the remainder is classified as noncurrent on the condensed consolidated balance sheets. The following table summarizes the activity in creator signing fees for the periods indicated (in thousands): Three Months Ended June 30, 2019 2018 Balance, beginning of period $ 19,120 $ 12,571 Creator signing fees paid 4,630 2,626 Amortization of creator signing fees (2,522 ) (1,713 ) Write-offs and other adjustments (465 ) (206 ) Balance, end of period $ 20,763 $ 13,278 Six Months Ended June 30, 2019 2018 Balance, beginning of period $ 17,005 $ 10,421 Creator signing fees paid 9,188 6,279 Amortization of creator signing fees (4,915 ) (3,077 ) Write-offs and other adjustments (515 ) (345 ) Balance, end of period $ 20,763 $ 13,278 Creator signing fees are classified as follows on the condensed consolidated balance sheet as of the dates indicated (in thousands): June 30, 2019 December 31, 2018 Creator signing fees, net $ 8,245 $ 7,324 Creator signing fees, noncurrent 12,518 9,681

Creator Advances, Net

Creator Advances, Net	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Creator Advances, Net	Creator Advances, Net Creator advances provide the creator with funds in advance of the event and are subsequently recovered by withholding amounts due to the Company from the sale of tickets for the event until the creator payment has been fully recovered. Creator advances that are expected to be recovered within 12 months of the balance sheet date are classified as creator advances, net and the remainder is classified as noncurrent on the condensed consolidated balance sheets. The following table summarizes the activity in creator advances for the periods indicated (in thousands): Three Months Ended June 30, 2019 2018 Balance, beginning of period $ 26,734 $ 22,129 Acquired with Ticketea transaction — 532 Creator advances paid 9,316 3,659 Creator advances recouped (4,914 ) (3,874 ) Write-offs and other adjustments (2,420 ) (845 ) Balance, end of period $ 28,716 $ 21,601 Six Months Ended June 30, 2019 2018 Balance, beginning of period $ 23,142 $ 20,076 Acquired with Ticketea transaction — 532 Creator advances paid 19,084 10,248 Creator advances recouped (10,663 ) (7,917 ) Write-offs and other adjustments (2,847 ) (1,338 ) Balance, end of period $ 28,716 $ 21,601 Creator advances are classified as follows on the condensed consolidated balance sheet as of the dates indicated (in thousands): June 30, 2019 December 31, 2018 Creator advances, net $ 26,182 $ 21,255 Creator advances, noncurrent 2,534 1,887

Property, Plant and Equipment,

Property, Plant and Equipment, Net	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net consisted of the following as of the dates indicated (in thousands): June 30, 2019 December 31, 2018 Building and improvements $ 33,277 $ 33,277 Capitalized internal-use software development costs 40,123 35,201 Furniture and fixtures 3,512 3,557 Computers and computer equipment 14,163 11,676 Leasehold improvements 6,161 5,084 97,236 88,795 Less: Accumulated depreciation and amortization (50,985 ) (44,576 ) Property, plant and equipment, net $ 46,251 $ 44,219 The Company recorded the following amounts related to depreciation expense and capitalized internal-use software development costs during the periods indicated (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Depreciation expense 1,599 1,221 3,236 2,363 Capitalized internal-use software development costs 2,614 2,115 4,922 4,562 Stock-based compensation costs included in capitalized internal-use software development costs 448 123 651 279 Amortization of capitalized internal-use software development costs 1,799 1,570 3,499 3,046

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets, Net	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquired Intangible Assets, Net	Goodwill and Acquired Intangible Assets, Net The carrying value of goodwill was $170.6 million as of June 30, 2019 and December 31, 2018 . Acquired intangible assets, net consisted of the following as of the dates indicated (in thousands): June 30, 2019 Cost Accumulated Net Book Weighted- Developed technology $ 19,096 $ 18,952 $ 144 0.7 Customer relationships 74,484 20,138 54,346 5.7 Tradenames 1,600 1,600 — Acquired intangible assets, net $ 95,180 $ 40,690 $ 54,490 December 31, 2018 Cost Accumulated Net Book Weighted- Developed technology $ 19,096 $ 18,628 $ 468 0.8 Customer relationships 74,484 14,979 59,505 6.2 Tradenames 1,600 1,600 — Acquired intangible assets, net $ 95,180 $ 35,207 $ 59,973 The Company recorded amortization expense related to acquired intangible assets as follows (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Cost of net revenue $ 95 $ 2,949 $ 324 $ 5,821 Sales, marketing and support 2,588 2,539 5,159 4,973 General and administrative — 301 — 577 Total amortization of acquired intangible assets $ 2,683 $ 5,789 $ 5,483 $ 11,371 As of June 30, 2019 , the total expected future amortization expense for acquired intangible assets is as follows (in thousands): The remainder of 2019 $ 5,342 2020 10,443 2021 10,197 2022 8,202 2023 7,709 Thereafter 12,597 Acquired intangible assets, net $ 54,490

Term Loans and Promissory Note

Term Loans and Promissory Note	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Term Loans and Promissory Note	Term Loans and Promissory Note The Company entered into a loan and security agreement with, and issued warrants to purchase shares of redeemable convertible preferred stock to Western Technology Investments (WTI) in June 2017 (First WTI Loan Facility), which provided for a secured credit facility of up to $60.0 million of term debt. The First WTI Loan Facility contained customary events of default. In September 2017, the Company borrowed $30.0 million as a term loan under the facility with a maturity date of February 2022 which bore interest at 11.5% annually (effective interest rate of 15.9% ). Monthly payments of interest were due for the first 24 months and equal monthly installments of principal and interest were due for 30 months thereafter. The loan could be prepaid at any time for an amount equal to the outstanding balance plus accrued interest, plus an amount equal to all scheduled but unpaid payments of interest that would have accrued and been payable through the maturity date. In March 2018, the Company borrowed an additional $30.0 million under the First WTI Loan Facility with a maturity date of September 2022, which bore interest at 11.75% annually (effective interest rate of 14.8% ). Monthly payments of interest were due for the first 24 months and equal monthly installments of principal and interest were due for 30 months thereafter. In May 2018, the Company entered into a second loan and security agreement with WTI (Second WTI Loan Facility, and together with the First WTI Loan Facility, the WTI Loan Facilities) and issued additional warrants to purchase shares of Series G redeemable convertible preferred stock. The secured credit facility provided up to $15.0 million of term debt, which the Company borrowed in full as a term loan under the facility in May 2018. This debt bore interest at 12.0% annually (effective interest rate of 14.7% ) and had a maturity date of November 2022. Monthly payments of interest were due for the first 24 months and equal monthly installments of principal and interest were due for 30 months thereafter. The WTI Loan Facilities were collateralized by substantially all of the Company's assets and intellectual property rights. The Second WTI Loan Facility included a contingent prepayment feature under which if the Company consummated a qualified public offering within the first 24 months of the term loan and the Company prepaid the term loan in conjunction with the qualified public offering, the Company would be required to prepay the outstanding contractual balance plus accrued interest within 15 days of the consummation of a qualified public offering plus an additional amount equal to 50% of all interest that would have been incurred through the end of first 24 months of the loan. In connection with the Second WTI Loan Facility, the Company modified the terms of the First WTI Loan Facility so that the $30.0 million borrowed in March 2018 under the First WTI Loan Facility would be subject to the same contingent prepayment feature in the event of a qualified public offering that is included in the Second WTI Loan Facility. The Company determined that these contingent prepayment features under the WTI term loans are embedded derivative assets, requiring bifurcation and separate accounting. The fair value of these term loan derivatives was $2.1 million as of June 30, 2018. The change in fair value of the term loan derivatives was not material to the condensed consolidated statement of operations for the three or six months ended June 30, 2018. In September 2018, five days after the completion of the IPO, the Company exercised its prepayment option and fully repaid all amounts outstanding under the WTI Loan Facilities. As of December 31, 2018, there were no amounts outstanding under the WTI Loan Facilities and all underlying agreements had been terminated. In September 2018, the Company entered into a senior secured credit facility with a syndicate of banks consisting of $75.0 million aggregate principal amount of term loans (the New Term Loans) and a $75.0 million revolving credit facility (the New Revolving Credit Facility, and together with the New Term Loans, the New Credit Facilities). The New Term Loans were fully funded in September 2018 and the Company received cash proceeds of $73.6 million , net of arrangement fees of $1.1 million and upfront fees of $0.3 million . The New Term Loans amortize at a rate of 7.5% per annum for the first two years of the New Credit Facilities, 10.0% per annum for the third and fourth years and the first three quarters of the fifth year of the New Credit Facilities, with the balance due at maturity. The New Term Loans and the New Revolving Credit Facility are each expected to mature on the fifth anniversary of the effectiveness of the New Credit Facilities. The New Revolving Credit Facility has a commitment fee, which currently accrues at 0.40% on the daily unused amount of the aggregate revolving commitments of the lenders. All outstanding amounts under the New Credit Facilities bear interest, at the Company's options, at (i) a reserve adjusted LIBO Rate plus a margin between 2.25% and 2.75% or (ii) a base rate plus a margin between 1.25% and 1.75% , in each case determined on a quarterly basis based on the Company's consolidated total leverage ratio. The current annual interest rate for the New Term Loans is 4.83% as of June 30, 2019 . The New Credit Facilities contain customary conditions to borrowing, events of default, and covenants. Financial covenants include maintaining a (i) maximum consolidated total leverage ratio; (ii) minimum consolidated interest coverage ratio; and (iii) minimum liquidity ratio. As of June 30, 2019 , the Company was in compliance with all financial covenants. In June 2019, the Company elected to make a principal payment of $10.0 million towards the New Term Loans and made total principal payments of $11.4 million during the three and six months ended June 30, 2019. Term loans consisted of the following at the dates indicated (in thousands): June 30, 2019 December 31, 2018 Outstanding principal balance $ 62,187 $ 73,594 Accrued but unpaid interest 25 — Less: Unamortized discount and debt issuance costs (768 ) (872 ) Total term loan, net $ 61,444 $ 72,722 Current portion of term loans $ 5,650 $ 5,635 Term loans 55,794 67,087 As of June 30, 2019 , the contractual principal payments for the New Term Loans for the next five years are as follows (in thousands): The remainder of 2019 $ 2,812 2020 6,094 2021 7,500 2022 7,500 2023 38,281 Total $ 62,187 Promissory Note In September 2017, the Company acquired 100% of the outstanding equity of Ticketfly, LLC (Ticketfly), a San Francisco based subsidiary of a publicly-held company. The acquisition of Ticketfly was accounted for as a business combination and the acquisition date fair value of the consideration transferred was $201.1 million , which consisted of $151.1 million in cash and $50.0 million in Convertible Promissory Notes (Promissory Note), which were paid and issued, respectively, at the closing of the transaction. The Promissory Note had a five year maturity from the date of issuance and bore interest at a rate of 6.5% per annum. In March 2018, the Company reached an agreement with the seller of Ticketfly to repay the Promissory Note. The face value of $50.0 million was settled in full for $34.7 million which represented $33.0 million of principal and $1.7 million of accrued interest. The Company recognized a gain of $17.0 million resulting from the extinguishment of the Promissory Note in the condensed consolidated statements of operations for the six months ended June 30, 2018 .

Redeemable Convertible Preferre

Redeemable Convertible Preferred Stock Warrants	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Redeemable Convertible Preferred Stock Warrants	Redeemable Convertible Preferred Stock Warrants In connection with the WTI Loan Facilities discussed in Note 10, the Company issued warrants to WTI to purchase shares of Series G redeemable convertible preferred stock. The redeemable convertible preferred stock warrants became exercisable into 411,991 shares of Series G redeemable convertible preferred stock when the First WTI Loan Facility was executed in June 2017. In September 2017, the redeemable convertible preferred stock warrants became exercisable into an additional 205,995 shares of Series G redeemable convertible preferred stock when the Company borrowed $30.0 million under the First WTI Loan Facility. In March 2018, as a result of the Company borrowing the remaining $30.0 million under the First WTI Loan Facility, the Series G redeemable convertible preferred stock warrants became exercisable into an additional 205,995 shares of Series G redeemable convertible preferred stock. In May 2018, the Company issued additional warrants which were exercisable into 109,288 shares of Series G redeemable convertible preferred stock. The exercise price of all of the Series G redeemable convertible preferred stock warrants was $16.3836 per share and the redeemable convertible preferred stock warrants had an expiration date ten years from the date of issuance. In September 2018, in connection with the IPO, the redeemable convertible preferred stock warrants were automatically exercised into shares of Class B common stock and the related liability was reclassified to additional paid-in capital. The Company recorded an increase in the fair value of the redeemable convertible preferred stock warrant liability of $4.8 million and $6.1 million during the three and six months ended June 30, 2018 , respectively. There was no activity during the three or six months ended June 30, 2019 . Refer to Note 3 for discussion of the significant inputs used to determine the fair value of the redeemable convertible preferred stock warrant liability.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases The Company leases office space under various noncancelable operating leases that expire at various dates through 2028. Rent expense from operating leases totaled $1.0 million and $0.6 million for the three months ended June 30, 2019 and 2018 , respectively, and $2.1 million and $1.1 million for the six months ended June 30, 2019 and 2018 , respectively. The Company also recognized sublease income of $1.0 million and $0.8 million for the three months ended June 30, 2019 and 2018 , respectively, and $1.9 million and $1.6 million for the six months ended June 30, 2019 and 2018 , respectively. Build-to-Suit Lease In December 2013, the Company executed a lease for 97,624 square feet of office space in San Francisco, California. The initial lease term is seven years with an option to renew for an additional three years , and the leased space represents two floors in a seven-floor building. The lease provided for a $6.4 million tenant improvement reimbursement allowance, which the Company utilized in 2014. In order for the facility to meet the Company’s operating specifications, both the landlord and the Company made structural changes as part of the improvement of the building, and as a result, the Company has concluded that it is the deemed partial owner of the building (for accounting purposes only) during the construction period. Accordingly, at lease inception, the Company recorded an asset of $22.3 million , representing its estimate of the fair market value of the leased space, and a corresponding lease financing obligation on the consolidated balance sheets. Upon completion of construction, the Company evaluated the derecognition of the asset and liability as a sale-leaseback transaction. The Company concluded it did not meet the provisions needed for sale-leaseback accounting, and thus the lease is being accounted for as a financing obligation. Lease payments are allocated to (1) a reduction of the principal financing obligation; (2) imputed interest expense; and (3) land lease expense (which is considered an operating lease) representing an imputed cost to lease the underlying land of the facility. In addition, the underlying building asset is being depreciated over the building’s estimated useful life of 30 years . The Company is evaluating the accounting treatment of the build-to-suit lease in connection with the adoption of ASU 2016-02. Land lease expense was $0.2 million for each of the three months ended June 30, 2019 and 2018 and $0.5 million for each of the six months ended June 30, 2019 and 2018 . Interest expense related to the Company’s build-to-suit lease was $0.8 million and $0.9 million for the three months ended June 30, 2019 and 2018 , respectively, and $1.7 million for each of the six months ended June 30, 2019 and 2018 . As of June 30, 2019 , the future minimum lease payments and sublease rental payments under noncancelable leases are as follows (in thousands): Capital Leases Build-to-Suit Operating Sublease Total The remainder of 2019 144 $ 2,829 $ 1,955 $ (2,061 ) $ 2,867 2020 230 5,772 3,844 (4,205 ) 5,641 2021 172 1,943 3,440 (1,239 ) 4,316 2022 86 — 3,185 — 3,271 2023 — — 2,836 — 2,836 Thereafter — — 4,392 — 4,392 Total minimum lease payments 632 10,544 19,652 (7,505 ) 23,323 Less: Amount representing interest and taxes — (5,888 ) — — (5,888 ) Total $ 632 $ 4,656 $ 19,652 $ (7,505 ) $ 17,435 Letters of Credit The Company has issued letters of credit under lease and other agreements, which have been collateralized with cash. This cash is classified as noncurrent restricted cash on the condensed consolidated balance sheets based on the term of the underlying agreements. During the six months ended June 30, 2019, the Company was released from a letter of credit for $1.0 million related to its leased office space in San Francisco, California. This amount was reclassified from restricted cash to cash and cash equivalents on the condensed consolidated balance sheets as of June 30, 2019. Creator Signing Fees and Creator Advances Creator signing fees and creator advances represent contractual amounts paid in advance to customers pursuant to event ticketing and payment processing agreements. Certain of the Company’s contracts include terms where future payments to creators are committed to as part of the overall ticketing arrangement. The following table presents, by year, the future creator payments committed to under contract but not yet paid as of June 30, 2019 (in thousands): The remainder of 2019 $ 6,153 2020 12,265 2021 5,024 2022 2,042 2023 1,313 Thereafter — Total $ 26,797 Litigation and Loss Contingencies The Company accrues estimates for resolution of legal and other contingencies when losses are probable and estimable. From time to time, the Company may become a party to litigation and subject to claims incident to the ordinary course of business, including intellectual property claims, labor and employment claims, and threatened claims, breach of contract claims, tax and other matters. On April 15, 2019, a purported stockholder of the Company filed a class action complaint against the Company, certain officers and members of the Company's board of directors and the underwriters for the Company's IPO (the Initial Complaint). On May 24, 2019 and June 3, 3019, additionally purported stockholders filed similar claims (together with the Initial Complaint, the Complaints). Among other things, the Complaints allege that defendants misrepresented and/or omitted material information in the Company's IPO registration statement in violation of the Securities Act. The Complaints allege that the Company and certain officers misrepresented and/or omitted material information in the Company's earnings release and Form 10-Q for the third quarter of 2018. The Complaints seek compensatory damages, costs and expenses, including attorneys' and expert fees, and other relief. The Company believes that the Complaints are without merit and the Company intends to vigorously defend the actions. The Company cannot predict the outcome of or estimate the possible loss or range of loss from the Complaints and therefore no amounts have been accrued for the contingency. The Company currently has no other material pending litigation. The Company is currently under audit in certain domestic jurisdictions with regard to indirect tax matters. The Company establishes reserves for indirect tax matters when it determines that the likelihood of a loss is probable, and the loss is reasonably estimable. Accordingly, the Company has established a reserve for the potential settlement of issues related to sales and other indirect taxes in the amount of $14.7 million and $19.2 million as of June 30, 2019 and December 31, 2018, respectively. These amounts, which represent management’s best estimates of its potential liability, include potential interest and penalties of $1.3 million and $1.2 million as of June 30, 2019 and December 31, 2018, respectively. In June 2018, a criminal was able to penetrate the Ticketfly website and steal certain consumer data, including names, email addresses, shipping addresses, billing addresses and phone numbers. For a short time, the Company disabled the Ticketfly platform to contain the risk of the cyber incident, which disabled ticket sales through Ticketfly during that period. Because of this incident, the Company incurred costs related to responding to and remediating the incident and suffered a loss of revenue for the period during which the Ticketfly platform was disabled. During the six months ended June 30, 2018 , the Company recorded an amount of $6.6 million for potential costs associated with this incident, of which $6.3 million was recorded as contra revenue and $0.3 million was recorded as an operating expense. This amount represented the Company’s best estimate of the total amount of creator accommodations to be made as a result of the incident at that time. During the three and six months ended June 30, 2019, the Company recorded $2.7 million and $3.0 million , respectively, as a reduction to general and administrative expenses related to business interruption insurance proceeds to be received as a result of the Ticketfly cyber incident. As of June 30, 2019, the Company's remaining liability balance related to the Ticketfly cyber incident was not material. The Company does not believe that any ultimate liability resulting from any of these matters will have a material adverse effect on its business, consolidated financial position, results of operations or liquidity. However, the outcome of these matters is inherently uncertain. Therefore, if one or more of these matters were resolved against the Company for amounts in excess of management’s expectations, the Company’s financial statements, including in a particular reporting period in which any such outcome becomes probable and estimable, could be materially adversely affected. Indemnifications In the ordinary course of business, the Company enters into contractual arrangements under which the Company agrees to provide indemnification of varying scope and terms to business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of the breach of such agreements, intellectual property infringement claims made by third parties, and other liabilities relating to or arising from the Company’s online ticketing platform or the Company’s acts or omissions. In these circumstances, payment may be conditional on the other party making a claim pursuant to the procedures specified in the particular contract. Further, the Company’s obligations under these agreements may be limited in terms of time and/or amount, and in some instances, the Company may have recourse against third parties for certain payments. In addition, the Company has indemnification agreements with its directors and executive officers that require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. The terms of such obligations vary.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Shareholders' Equity	Stockholders' Equity Common Stock 2004 and 2010 Stock Option Plans In 2004, the board of directors and stockholders of the Company authorized and ratified the 2004 Stock Plan (2004 Plan), as amended. The 2004 Plan allows for the issuance of incentive stock options (ISOs), non-statutory stock options (NSOs) and stock purchase rights. The 2004 Plan states the maximum aggregate number of shares that may be subject to options or stock purchase rights and sold under the plan is 6,000,000 shares. In 2010, the board of directors and stockholders of the Company authorized and ratified the 2010 Stock Plan (2010 Plan), as amended. The 2010 Plan replaced the 2004 Plan as the board of directors determined to cease granting awards under the 2004 Plan. The 2004 Plan will continue to govern outstanding equity awards granted thereunder. The 2010 Plan allows for the issuance of ISOs, NSOs and stock purchase rights. The 2010 Plan states the maximum aggregate number of shares that may be subject to options or stock purchase rights and sold under the plan is 29,963,761 shares. 2018 Stock Option and Incentive Plan In August 2018, the 2018 Stock Option and Incentive Plan (2018 Plan) was adopted by the board of directors and approved by the stockholders and became effective in connection with the IPO. The 2018 Plan replaces the 2010 Plan as the board of directors has determined not to make additional awards under the 2010 Plan. The 2010 Plan will continue to govern outstanding equity awards granted thereunder. As of June 30, 2019, we have 7,745,819 shares of Class A common stock reserved for the issuance of awards under the 2018 Plan. The Company has two classes of common stock, Class A and Class B. Holders of Class A common stock are entitled to one vote per share and holders of Class B common stock are entitled to ten votes per share. The Company’s common stock has no preferences or privileges and is not redeemable. Holders of Class A and Class B common stock are entitled to dividends, if and when declared by the Company’s board of directors. The 2018 Plan allows for the granting of ISOs, NSOs, stock appreciation rights, restricted stock, restricted stock units (RSUs), unrestricted stock awards, dividend equivalent rights and cash-based awards. As of June 30, 2019 , there were 18,622,464 options issued and outstanding and 12,101,221 shares available for issuance under the 2004 Plan, 2010 Plan and 2018 Plan (collectively, the Plans). Stock options typically vest over a four -year period from the date of grant. Options awarded under the Plans may be granted at an exercise price per share not less than the fair value at the date of grant and are exercisable up to 10 years . Stock option activity under the Plans is as follows: Outstanding Weighted- Weighted- Aggregate (thousands) Balance as of December 31, 2018 22,012,597 $7.85 7.1 $439,382 Granted 1,174,160 $17.96 Exercised (3,819,674 ) $6.01 $23,869 Cancelled (744,619 ) $12.74 Balance as of June 30, 2019 18,622,464 $8.67 6.7 $140,970 Vested and exercisable as of December 31, 2018 12,462,693 $5.75 5.6 $274,883 Vested and expected to vest as of December 31, 2018 20,926,797 $7.69 7.0 $421,047 Vested and exercisable as of June 30, 2019 10,860,362 $6.51 5.3 $105,536 Vested and expected to vest as of June 30, 2019 17,844,757 $8.53 6.6 $137,576 2018 Employee Stock Purchase Plan In August 2018, the board of directors adopted, and stockholders approved, the 2018 Employee Stock Purchase Plan (ESPP). Subject to any plan limitations, the ESPP allows eligible employees to contribute, through payroll deductions, up to 15% of their earnings for the purchase of the Company's Class A common stock at a discounted price per share. Except for the initial offering period, the ESPP provides for separate six-month offering periods. The initial offering period was from September 20, 2018 through May 31, 2019 and the second offering period is from June 1, 2019 through November 30, 2019. Unless otherwise determined by the Company's board of directors, the Company's Class A common stock will be purchased for the accounts of employees participating in the ESPP at a price per share that is the lesser of (1) 85% the fair market value of the Company's Class A common stock on the first trading day of the offering period, which for the initial offering period is the price at which shares of the Company's Class A common stock were first sold to the public, or (2) 85% the fair market value of the Company's Class A common stock on the last trading day of the offering period. In January 2019, the board of directors approved the reservation of an additional 783,583 shares of Class A common stock for a total of 2,318,083 shares reserved for issuance under the ESPP. On May 31, 2019, 167,706 shares were purchased under the ESPP, and as of June 30, 2019 , 2,150,377 shares of Class A common stock were available for future issuance under the ESPP. The Company recorded $0.2 million and $0.5 million of stock-based compensation expense related to the ESPP during the three and six months ended June 30, 2019 , respectively. No expense was recorded in connection with the ESPP during the three or six months ended June 30, 2018 as the ESPP was established in September 2018. Common Stock Subject to Repurchase The Plans and the Company’s stock option agreement allow for the early exercise of stock options for certain individuals, as determined by the board of directors. Common stock purchased pursuant to an early exercise of stock options is not deemed to be outstanding for accounting purposes until those shares vest. The consideration received for an exercise of an option is considered to be a deposit of the exercise price and the related dollar amount is recorded as a liability. Upon termination of service, the Company may, at their discretion, repurchase unvested shares acquired through early exercise of stock options at a price equal to the price per share paid upon the exercise of such options. The Company includes unvested shares subject to repurchase in the number of shares of common stock outstanding. At June 30, 2019 and December 31, 2018 , outstanding common stock included 42,463 and 55,537 shares, respectively, subject to repurchase related to stock options that have been early exercised and remain unvested. The Company had a liability of $0.4 million as of June 30, 2019 and December 31, 2018 related to early exercises of stock options. The liability is reclassified into stockholders’ equity as the awards vest. Stock-based Compensation Expense All stock-based awards to employees and members of the Company’s board of directors are measured based on the grant date fair value of the awards and recognized in the consolidated statements of operations over the period during which the employee is required to perform services in exchange for the award (the vesting period of the award). The Company estimates the fair value of stock options granted using the Black-Scholes option pricing model and records stock-based compensation expense for service-based equity awards using the straight-line attribution method. The following range of assumptions were used to estimate the fair value of stock options granted to employees: Three Months Ended Six Months Ended 2019 2018 2019 2018 Expected dividend yield — — — — Expected volatility 49.2-49.4% 52.9% 49.2-49.7% 48.3-52.9% Risk-free interest rate 1.85-1.95% 2.55% 1.85-2.58% 2.32-2.61% Expected term (years) 5.13-6.08 6.08 5.13-6.08 6.08 The weighted-average per share fair value of stock options granted was $ 8.02 and $ 6.61 for the three months ended June 30, 2019 and 2018, respectively, and $8.84 and $ 5.88 for the six months ended June 30, 2019 and 2018, respectively. As of June 30, 2019 and December 31, 2018 , the total unrecognized stock-based compensation related to unvested options outstanding was $46.9 million and $51.3 million , respectively, to be recognized over a weighted-average period of 2.55 years and 2.73 years , respectively. Restricted Stock Units Restricted stock unit activity under the Plans was as follows for the six months ended June 30, 2019 : Outstanding RSUs Weighted-average grant date fair value per share Balance as of December 31, 2018 670,606 $ 24.71 Awarded 2,524,441 21.60 Released (140,022 ) 20.40 Cancelled (230,136 ) 28.93 Balance as of June 30, 2019 2,824,889 $ 21.79 Vested and expected to vest as of June 30, 2019 2,277,893 $ 21.77 The Company recognized $3.7 million and $6.1 million of stock-based compensation expense related to RSUs during the three and six months ended June 30, 2019, respectively, and as of that date, the total unrecognized stock-based compensation related to RSUs outstanding was $49.1 million , which is expected to be recognized over a weighted-average period of 3.65 years . The Company recognized no expense related to RSUs during the three or six months ended June 30, 2018 as all outstanding RSUs had a performance vesting condition that had not been met. Sales of the Company’s Stock In May 2018, employees and former employees of the Company sold an aggregate of 1.3 million shares of the Company’s common stock to entities affiliated with an existing investor at a purchase price of $13.12 per share, for an aggregate purchase price of $17.2 million . The purchase price was in excess of the fair value of such shares. As a result, during the three months ended June 30, 2018 , the Company recorded the excess of the purchase price above fair value of $2.2 million as compensation expense, of which $2.0 million is included within general and administrative expense and $0.2 million is included within sales, marketing and support expense on the condensed consolidated statements of operations.

Net Loss Per Share

Net Loss Per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share Basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Diluted net loss per share is computed by giving effect to all potentially dilutive securities outstanding for the period. In periods of net loss, basic net loss per share and diluted net loss per share are equal as including the potentially dilutive securities has an anti-dilutive effect. The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share data): Three Months Ended Six Months Ended 2019 2018 2019 2018 Net loss $ (14,833 ) $ (24,603 ) $ (24,831 ) $ (15,580 ) Weighted-average shares used in computing net loss per share, basic and diluted 81,369 21,886 80,049 21,289 Net loss per share, basic and diluted $ (0.18 ) $ (1.12 ) $ (0.31 ) $ (0.73 ) The following outstanding shares of potentially dilutive securities were excluded from the computation of diluted net loss per share because including them would have had an anti-dilutive effect (in thousands): June 30, 2019 2018 Redeemable convertible preferred stock (on an if-converted basis) — 41,628 Options to purchase common stock 18,622 18,483 Redeemable convertible preferred stock warrants — 933 Restricted stock units 2,784 1,033 Early exercised options 42 79 Total 21,448 62,156

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded an income tax benefit of $1.2 million and $1.1 million for the three and six months ended June 30, 2019, respectively, compared to an income tax provision of $0.4 million and $0.8 million for the three and six months ended June 30, 2018, respectively. The income tax benefit increase in the three and six months ended June 30, 2019 was primarily attributable to changes in our year over year taxable earnings mix and the recognition of tax attributes in our non-U.S. subsidiaries. The differences in the tax provision for the periods presented and the United States federal statutory rate is primarily due to foreign taxes in profitable jurisdictions and the recording of a full valuation allowance on our net deferred tax assets and certain foreign losses which benefit from rates lower than the U.S. federal statutory rate. The Company applies the discrete method provided in ASC 740 to calculate its interim tax provision.

Geographic Information

Geographic Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Geographic Information	Geographic Information The Company operates as a single reportable and operating segment. The following table presents the Company's total net revenue by geography based on the currency of the underlying transaction for the periods indicated (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 United States $ 58,687 $ 47,206 $ 118,471 $ 104,491 International 22,071 20,336 43,613 37,577 Total net revenue $ 80,758 $ 67,542 $ 162,084 $ 142,068 No individual country included in the International line above represents more than 10% of the total consolidated net revenue for any of the periods presented. Substantially all of the Company's long-lived assets are located in the United States. In the three months ended June 30, 2018, the Company recorded a $6.3 million contra-revenue charge related to liabilities incurred in connection with the Ticketfly cyber incident. This amount is reflected as a reduction in net revenue in the United States caption shown in the table above for the three and six months ended June 30, 2018.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In July 2019, a Canadian event creator cancelled an event for which the Company provided ticketing and payment processing services. In July 2019, while not legally obligated, the Company issued refunds for the face value of tickets totaling $4.0 million . This amount will be recorded as an operating expense in the three months ended September 30, 2019 and could be partially offset by any amounts that are determined to be recoverable from the event creator or a third party. The revenue recognized related to this event was not material to the Company’s condensed consolidated statements of operations for the three or six months ended June 30, 2019. On July 16, 2019, we filed two complaints in the United States District Court for the Northern District of California, entitled Eventbrite, Inc. v. MF Live, Inc., et al., 3:19-CV-04084 (the MF Live Complaint) and Eventbrite, Inc. v. Fab Loranger et al., 3:19-CV-04083 (the Fab Loranger Complaint), related to a cancelled event for which we provided ticketing and payment processing services and for which, while not legally obligated, we issued refunds for the face value of tickets totaling $4.0 million . Among other things, the complaints allege that MF Live, Inc. (MF Live) is in breach of its written contract with us (the Services Agreement) whereby MF Live committed (i) to refund customers in the event their music festival was cancelled and (ii) if MF Live failed to issue refunds, we were authorized to issue refunds on MF Live’s behalf, in which event MF Live would promptly repay us in full. On July 12, 2019, MF Live filed for bankruptcy in the City of Wasaga Beach, in the Province of Ontario. We cannot predict the outcome of or estimate the possible recovery or range of recovery from the above described matter.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	The accompanying interim condensed consolidated financial statements of the Company are unaudited. The interim unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and the applicable rules and regulations of the Securities and Exchange Commission (SEC) for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated balance sheet as of December 31, 2018 included herein was derived from the audited financial statements as of that date. The accompanying interim unaudited condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and, in the opinion of management, reflect all adjustments of a normal and recurring nature considered necessary to state fairly the Company's consolidated financial position, results of operations and cash flows for the interim periods. All intercompany transactions and balances have been eliminated. The interim results for the three and six months ended June 30, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 or for any other future annual or interim period. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with "Management's Discussion and Analysis of Financial Condition and Results of Operations," "Quantitative and Qualitative Disclosures About Market Risk" and the Consolidated Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 (2018 Form 10-K).
Use of Estimates	In order to conform with U.S. GAAP, the Company is required to make certain estimates, judgments and assumptions when preparing its condensed consolidated financial statements. These estimates, judgments and assumptions affect the reported assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reported periods. These estimates include, but are not limited to, the recoverability of creator signing fees and creator advances, the capitalization and estimated useful life of internal-use software, certain assumptions used in the valuation of equity awards, assumptions used in determining the fair value of the redeemable convertible preferred stock warrant liability and term loan derivative asset, assumptions used in determining the fair value of business combinations, the allowance for doubtful accounts, indirect tax reserves and contra revenue amounts related to fraudulent events, customer disputed transactions and refunds. The Company evaluates these estimates on an ongoing basis. Actual results could differ from those estimates and such differences could be material to the Company’s consolidated financial statements.
Comprehensive Loss	For all periods presented, comprehensive loss equaled net loss. Therefore, the condensed consolidated statements of comprehensive loss have been omitted from the interim unaudited condensed consolidated financial statements.
Emerging Growth Company Status	As an emerging growth company (EGC), the Jump-start Our Business Start-ups Act (JOBS Act) allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to use this extended transition period under the JOBS Act. As a result, the Company's financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective dates for new or revised accounting standards that are applicable to public companies. Based on the market value of our Class A common stock held by non-affiliates as of June 30, 2019, we will become a large accelerated filer as of December 31, 2019 and cease to be an emerging growth company, and, therefore, will no longer be able to take advantage of this extended transition period.
Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Adopted	In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350) : Simplifying the Test for Goodwill Impairment , which eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. This standard is effective for the annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. This standard will apply to the Company’s reporting requirements in performing goodwill impairment testing, however, the Company does not anticipate the adoption of this standard will have a material impact on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02) which requires lessees to put most leases on their balance sheets but recognize expenses on their income statement and eliminates the real estate-specific provisions for all entities. The guidance is effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the effect that implementation of this standard will have on its consolidated financial statements upon adoption. The Company adopted ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business beginning January 1, 2019. This standard clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The adoption of this standard has had no material impact on the Company's interim condensed consolidated financial statements. In May 2014, and in subsequent updates, the Financial Accounting Standards Board (FASB) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and Other Assets and Deferred Costs—Contracts with Customers (Subtopic 340-40) (ASC Topic 606), which supersedes nearly all existing revenue recognition guidance. ASC Topic 606 establishes a five-step revenue recognition process in which an entity will recognize revenue when or as it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. ASC Topic 606 also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenues and cash flows from contracts with customers. ASC Topic 606 was effective for and adopted by the Company beginning January 1, 2019. The Company applied the modified retrospective approach to contracts which were not completed as of the adoption date. The adoption of ASC Topic 606 primarily had the following impact on the Company's financial statements: ▪ Beginning January 1, 2019, the Company recognizes revenue allocated to its customer service and account management performance obligations over time as the Company has a stand-ready obligation to provide these services to certain customers. The Company recorded a cumulative-effect adjustment to opening accumulated deficit as of January 1, 2019 of $0.6 million and a corresponding increase to contract liabilities, included within other accrued liabilities on the interim condensed consolidated balance sheet. ▪ The adoption of ASC Topic 606 had no material impact to the Company's net revenues recorded in the three or six months ended June 30, 2019 . ▪ The accounting treatment of incremental costs of obtaining contracts under ASC Topic 606 had no material impact to the Company's interim unaudited condensed consolidated financial statements. ▪ The adoption of ASC Topic 606 had no impact to the Company's total net cash provided by or used in operating, investing or financing activities within the Company's interim condensed consolidated statement of cash flows for the three or six months ended June 30, 2019 . Refer to Revenue Recognition below for additional discussion of the Company's revenue recognition policies under ASC Topic 606.
Cash, Cash Equivalents and Restricted Cash	Cash and cash equivalents includes bank deposits held by financial institutions. Cash and cash equivalents balances include the face value of tickets sold on behalf of creators and their share of service charges, which amounts are to be remitted to the creators. Such balances were $279.5 million and $217.4 million as of June 30, 2019 and December 31, 2018 , respectively. Although creator cash is legally unrestricted, the Company does not utilize creator cash for its own financing or investing activities as the amounts are payable to creators on a regular basis. These amounts due to creators are included in accounts payable, creators on the condensed consolidated balance sheets. The Company has issued letters of credit under lease agreements and other agreements, which have been collateralized with cash. This cash is classified as noncurrent restricted cash on the condensed consolidated balance sheets.
Funds Receivable	Funds receivable represents cash-in-transit from third-party payment processors that is received by the Company within approximately five business days from the date of the underlying ticketing transaction. The funds receivable balances include the face value of tickets sold on behalf of creators and their share of service charges, which amounts are to be remitted to the creators.
Revenue Recognition	The Company determines revenue recognition through the following steps: i. Identification of the contract, or contracts, with a customer ii. Identification of the performance obligations in the contract iii. Determination of the transaction price iv. Allocation of the transaction price to the performance obligations in the contract v. Recognition of revenue when, or as, the Company satisfies a performance obligation The Company derives its revenues primarily from service fees and payment processing fees charged at the time a ticket for an event is sold. The Company also derives revenues from providing certain creators with account management services and customer support. The Company's customers are event creators who are selling tickets for events using the Company's platform. Tickets are sold by creators to attendees. Revenue is recognized when or as control of the promised goods or services is transferred to customers, in an amount that reflects the consideration the Company expects to receive in exchange for those goods or services. The Company allocates the transaction price by estimating a standalone selling price for each performance obligation using an expected cost plus a margin approach. For service fees and payment processing fees, revenue is recognized when the ticket is sold. For account management services and customer support, revenue is recognized over the period from the date of the sale of the ticket to the date of the event. The event creator has the choice of whether to use Eventbrite Payment Processing (EPP) or to use a third-party payment processor, referred to as Facilitated Payment Processing (FPP). Under the EPP option, the Company is the merchant of record and is responsible for processing the transaction and collecting the face value of the ticket and all associated fees at the time the ticket is sold. The Company is also responsible for remitting these amounts collected, less the Company's fees, to the event creator. Under the FPP option, Eventbrite is not responsible for processing the transaction or collecting the face value of the ticket and associated fees. In this case, the Company invoices the creator for all of the Company's fees. The Company evaluates whether it is appropriate to recognize revenue on a gross or net basis based upon its evaluation of whether the Company obtains control of the specified goods or services by considering if it is primarily responsible for fulfillment of the promise, has inventory risk, and has the latitude in establishing pricing and selecting suppliers, among other factors. The Company determined the event creator is the party responsible for fulfilling the promise to the attendee, as the creator is responsible for providing the event for which a ticket is sold, determines the price of the ticket and is responsible for providing a refund if the event is canceled. The Company's service provides a platform for the creator and event attendee to transact and the Company's performance obligation is to facilitate and process that transaction and issue the ticket. The amount that the Company earns for its services is fixed. For the payment processing service, the Company determined that it is the principal in providing the service as the Company is responsible for fulfilling the promise to process the payment and has discretion and latitude in establishing the price of its service. Based on management's assessment, the Company records revenue on a net basis related to its ticketing service and on a gross basis related to its payment processing service. As a result, costs incurred for processing the transactions are included in cost of net revenues in the condensed consolidated statements of operations. Revenue is presented net of indirect taxes, value-added taxes, creator royalties and reserves for customer refunds, payment chargebacks and estimated uncollectible amounts. If an event is cancelled by a creator, then any obligations to provide refunds to event attendees are the responsibility of that creator. If a creator is unwilling or unable to fulfill their refund obligations, the Company may, at its discretion, provide attendee refunds. Revenue is also presented net of the amortization of creator signing fees. The benefit the Company receives by securing exclusive ticketing and payment processing rights with certain creators from creator signing fees is inseparable from the customer relationship with the creator and accordingly these fees are recorded as a reduction of revenue.
Fair Value Measurement	The Company measures its financial assets and liabilities at fair value at each reporting date using a fair value hierarchy that requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value: Level 1 – Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 – Other inputs that are directly or indirectly observable in the marketplace. Level 3 – Unobservable inputs that are supported by little or no market activity. The Company’s funds receivable, accounts receivable, accounts payable, other current liabilities and debt approximate their fair value. All of these financial assets and liabilities are Level 1, except for debt, which is Level 2. There are no other Level 1 or Level 2 assets or liabilities recorded at June 30, 2019 and December 31, 2018 . The Company measures the redeemable convertible preferred stock warrant liability (as discussed in Note 11) and term loan derivative asset (as discussed in Note 10) at fair value on a recurring basis and determined these are Level 3 financial assets and liabilities, respectively, in the fair value hierarchy. The fair value of the redeemable convertible preferred stock warrants was estimated using a hybrid between a probability-weighted expected return method (PWERM) and option pricing model (OPM), estimating the probability weighted value across multiple scenarios, while using an OPM to estimate the allocation of value within one or more of these scenarios. Under a PWERM, the value of the Company’s various equity securities was estimated based upon an analysis of future values for the Company assuming various future outcomes, including two IPO scenarios and two scenarios contemplating the continued operation of the Company as a privately held enterprise. Guideline public company multiples were used to value the Company under the IPO scenarios. The discounted cash flow method was used to value the Company under the staying private scenarios. Share value for each class of security was based upon the probability-weighted present value of expected future investment returns, considering each of these possible future outcomes, as well as the rights of each share class. The significant unobservable inputs into the valuation model used to estimate the fair value of the redeemable convertible preferred stock warrants include the timing of potential events (primarily the IPO) and their probability of occurring, the selection of guideline public company multiples, a discount for the lack of marketability of the preferred and common stock, the projected future cash flows, and the discount rate used to calculate the present-value of the estimated equity value allocated to each share class. Generally, changes in the fair value of the underlying redeemable convertible preferred stock would result in a directionally similar impact to the fair value of the redeemable convertible preferred stock warrant liability. The significant unobservable inputs into the valuation model used to estimate the fair value of the term loan derivative asset include the timing of potential events (primarily the IPO), probability of exercise and the discount rate used to calculate the present value of discounted cash flows.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the condensed consolidated balance sheets that sum to the total of the same amounts shown in the condensed consolidated statements of cash flows (in thousands): June 30, 2019 December 31, 2018 Cash and cash equivalents $ 500,454 $ 437,892 Restricted cash 508 1,508 Total cash, cash equivalents and restricted cash $ 500,962 $ 439,400
Schedule of Restricted Cash	The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the condensed consolidated balance sheets that sum to the total of the same amounts shown in the condensed consolidated statements of cash flows (in thousands): June 30, 2019 December 31, 2018 Cash and cash equivalents $ 500,454 $ 437,892 Restricted cash 508 1,508 Total cash, cash equivalents and restricted cash $ 500,962 $ 439,400

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the respective acquisition dates (in thousands): Ticketea Cash and restricted cash $ 17,852 Funds and accounts receivable 1,058 Creator advances 532 Prepaid expenses and other current assets 94 Property and equipment 42 Other noncurrent assets 28 Accounts payable, creators (19,671 ) Other current liabilities (529 ) Intangible assets 3,094 Goodwill 8,937 Total purchase price $ 11,437
Finite-Lived Intangible Assets Acquired as Part of Business Combination	The following table sets forth the components of identifiable intangible assets acquired (in thousands) and their estimated useful lives as of the date of acquisition (in years): Ticketea Estimated Customer relationships $ 2,475 5.0 Developed technology 619 1.0 Total acquired intangible assets $ 3,094

Accounts Receivable, Net (Table

Accounts Receivable, Net (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of Accounts Receivable	The following table summarizes the Company’s accounts receivable balance (in thousands): June 30, 2019 December 31, 2018 Accounts receivable, customers $ 6,706 $ 5,651 Allowance for doubtful accounts (2,338 ) (1,582 ) Accounts receivable, net $ 4,368 $ 4,069 The following table summarizes the activity in creator advances for the periods indicated (in thousands): Three Months Ended June 30, 2019 2018 Balance, beginning of period $ 26,734 $ 22,129 Acquired with Ticketea transaction — 532 Creator advances paid 9,316 3,659 Creator advances recouped (4,914 ) (3,874 ) Write-offs and other adjustments (2,420 ) (845 ) Balance, end of period $ 28,716 $ 21,601 Six Months Ended June 30, 2019 2018 Balance, beginning of period $ 23,142 $ 20,076 Acquired with Ticketea transaction — 532 Creator advances paid 19,084 10,248 Creator advances recouped (10,663 ) (7,917 ) Write-offs and other adjustments (2,847 ) (1,338 ) Balance, end of period $ 28,716 $ 21,601 Creator advances are classified as follows on the condensed consolidated balance sheet as of the dates indicated (in thousands): June 30, 2019 December 31, 2018 Creator advances, net $ 26,182 $ 21,255 Creator advances, noncurrent 2,534 1,887

Creator Signing Fees, Net (Tabl

Creator Signing Fees, Net (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Schedule of Creator Signing Fees, Net	The following table summarizes the activity in creator signing fees for the periods indicated (in thousands): Three Months Ended June 30, 2019 2018 Balance, beginning of period $ 19,120 $ 12,571 Creator signing fees paid 4,630 2,626 Amortization of creator signing fees (2,522 ) (1,713 ) Write-offs and other adjustments (465 ) (206 ) Balance, end of period $ 20,763 $ 13,278 Six Months Ended June 30, 2019 2018 Balance, beginning of period $ 17,005 $ 10,421 Creator signing fees paid 9,188 6,279 Amortization of creator signing fees (4,915 ) (3,077 ) Write-offs and other adjustments (515 ) (345 ) Balance, end of period $ 20,763 $ 13,278 Creator signing fees are classified as follows on the condensed consolidated balance sheet as of the dates indicated (in thousands): June 30, 2019 December 31, 2018 Creator signing fees, net $ 8,245 $ 7,324 Creator signing fees, noncurrent 12,518 9,681

Creator Advances, Net (Tables)

Creator Advances, Net (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of Activity in Creator Advances	The following table summarizes the Company’s accounts receivable balance (in thousands): June 30, 2019 December 31, 2018 Accounts receivable, customers $ 6,706 $ 5,651 Allowance for doubtful accounts (2,338 ) (1,582 ) Accounts receivable, net $ 4,368 $ 4,069 The following table summarizes the activity in creator advances for the periods indicated (in thousands): Three Months Ended June 30, 2019 2018 Balance, beginning of period $ 26,734 $ 22,129 Acquired with Ticketea transaction — 532 Creator advances paid 9,316 3,659 Creator advances recouped (4,914 ) (3,874 ) Write-offs and other adjustments (2,420 ) (845 ) Balance, end of period $ 28,716 $ 21,601 Six Months Ended June 30, 2019 2018 Balance, beginning of period $ 23,142 $ 20,076 Acquired with Ticketea transaction — 532 Creator advances paid 19,084 10,248 Creator advances recouped (10,663 ) (7,917 ) Write-offs and other adjustments (2,847 ) (1,338 ) Balance, end of period $ 28,716 $ 21,601 Creator advances are classified as follows on the condensed consolidated balance sheet as of the dates indicated (in thousands): June 30, 2019 December 31, 2018 Creator advances, net $ 26,182 $ 21,255 Creator advances, noncurrent 2,534 1,887

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net	Property, plant and equipment, net consisted of the following as of the dates indicated (in thousands): June 30, 2019 December 31, 2018 Building and improvements $ 33,277 $ 33,277 Capitalized internal-use software development costs 40,123 35,201 Furniture and fixtures 3,512 3,557 Computers and computer equipment 14,163 11,676 Leasehold improvements 6,161 5,084 97,236 88,795 Less: Accumulated depreciation and amortization (50,985 ) (44,576 ) Property, plant and equipment, net $ 46,251 $ 44,219
Capitalized Internal-Use Software Development Costs	The Company recorded the following amounts related to depreciation expense and capitalized internal-use software development costs during the periods indicated (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Depreciation expense 1,599 1,221 3,236 2,363 Capitalized internal-use software development costs 2,614 2,115 4,922 4,562 Stock-based compensation costs included in capitalized internal-use software development costs 448 123 651 279 Amortization of capitalized internal-use software development costs 1,799 1,570 3,499 3,046

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangible Assets, Net (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Intangible Assets	Acquired intangible assets, net consisted of the following as of the dates indicated (in thousands): June 30, 2019 Cost Accumulated Net Book Weighted- Developed technology $ 19,096 $ 18,952 $ 144 0.7 Customer relationships 74,484 20,138 54,346 5.7 Tradenames 1,600 1,600 — Acquired intangible assets, net $ 95,180 $ 40,690 $ 54,490 December 31, 2018 Cost Accumulated Net Book Weighted- Developed technology $ 19,096 $ 18,628 $ 468 0.8 Customer relationships 74,484 14,979 59,505 6.2 Tradenames 1,600 1,600 — Acquired intangible assets, net $ 95,180 $ 35,207 $ 59,973
Amortization Expense Related to Acquired Intangible Assets	The Company recorded amortization expense related to acquired intangible assets as follows (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Cost of net revenue $ 95 $ 2,949 $ 324 $ 5,821 Sales, marketing and support 2,588 2,539 5,159 4,973 General and administrative — 301 — 577 Total amortization of acquired intangible assets $ 2,683 $ 5,789 $ 5,483 $ 11,371
Total Expected Future Amortization Expense for Acquired Intangible Assets	As of June 30, 2019 , the total expected future amortization expense for acquired intangible assets is as follows (in thousands): The remainder of 2019 $ 5,342 2020 10,443 2021 10,197 2022 8,202 2023 7,709 Thereafter 12,597 Acquired intangible assets, net $ 54,490

Term Loans and Promissory Note

Term Loans and Promissory Note (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Term Loans	Term loans consisted of the following at the dates indicated (in thousands): June 30, 2019 December 31, 2018 Outstanding principal balance $ 62,187 $ 73,594 Accrued but unpaid interest 25 — Less: Unamortized discount and debt issuance costs (768 ) (872 ) Total term loan, net $ 61,444 $ 72,722 Current portion of term loans $ 5,650 $ 5,635 Term loans 55,794 67,087
Contractual Principal Payments for the Next Five Years	As of June 30, 2019 , the contractual principal payments for the New Term Loans for the next five years are as follows (in thousands): The remainder of 2019 $ 2,812 2020 6,094 2021 7,500 2022 7,500 2023 38,281 Total $ 62,187

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Payments and Sublease Rental Payments under Noncancelable Capital Leases	As of June 30, 2019 , the future minimum lease payments and sublease rental payments under noncancelable leases are as follows (in thousands): Capital Leases Build-to-Suit Operating Sublease Total The remainder of 2019 144 $ 2,829 $ 1,955 $ (2,061 ) $ 2,867 2020 230 5,772 3,844 (4,205 ) 5,641 2021 172 1,943 3,440 (1,239 ) 4,316 2022 86 — 3,185 — 3,271 2023 — — 2,836 — 2,836 Thereafter — — 4,392 — 4,392 Total minimum lease payments 632 10,544 19,652 (7,505 ) 23,323 Less: Amount representing interest and taxes — (5,888 ) — — (5,888 ) Total $ 632 $ 4,656 $ 19,652 $ (7,505 ) $ 17,435
Future Minimum Lease Payments and Sublease Rental Payments under Noncancelable Operating Leases	As of June 30, 2019 , the future minimum lease payments and sublease rental payments under noncancelable leases are as follows (in thousands): Capital Leases Build-to-Suit Operating Sublease Total The remainder of 2019 144 $ 2,829 $ 1,955 $ (2,061 ) $ 2,867 2020 230 5,772 3,844 (4,205 ) 5,641 2021 172 1,943 3,440 (1,239 ) 4,316 2022 86 — 3,185 — 3,271 2023 — — 2,836 — 2,836 Thereafter — — 4,392 — 4,392 Total minimum lease payments 632 10,544 19,652 (7,505 ) 23,323 Less: Amount representing interest and taxes — (5,888 ) — — (5,888 ) Total $ 632 $ 4,656 $ 19,652 $ (7,505 ) $ 17,435
Future Creator Payments Committed to under Contract but Not Yet Paid	The following table presents, by year, the future creator payments committed to under contract but not yet paid as of June 30, 2019 (in thousands): The remainder of 2019 $ 6,153 2020 12,265 2021 5,024 2022 2,042 2023 1,313 Thereafter — Total $ 26,797

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Schedule of stock option activity	Stock option activity under the Plans is as follows: Outstanding Weighted- Weighted- Aggregate (thousands) Balance as of December 31, 2018 22,012,597 $7.85 7.1 $439,382 Granted 1,174,160 $17.96 Exercised (3,819,674 ) $6.01 $23,869 Cancelled (744,619 ) $12.74 Balance as of June 30, 2019 18,622,464 $8.67 6.7 $140,970 Vested and exercisable as of December 31, 2018 12,462,693 $5.75 5.6 $274,883 Vested and expected to vest as of December 31, 2018 20,926,797 $7.69 7.0 $421,047 Vested and exercisable as of June 30, 2019 10,860,362 $6.51 5.3 $105,536 Vested and expected to vest as of June 30, 2019 17,844,757 $8.53 6.6 $137,576
Schedule of assumptions used to estimate fair value of stock options	The following range of assumptions were used to estimate the fair value of stock options granted to employees: Three Months Ended Six Months Ended 2019 2018 2019 2018 Expected dividend yield — — — — Expected volatility 49.2-49.4% 52.9% 49.2-49.7% 48.3-52.9% Risk-free interest rate 1.85-1.95% 2.55% 1.85-2.58% 2.32-2.61% Expected term (years) 5.13-6.08 6.08 5.13-6.08 6.08
Schedule of nonvested restricted stock unit	Restricted stock unit activity under the Plans was as follows for the six months ended June 30, 2019 : Outstanding RSUs Weighted-average grant date fair value per share Balance as of December 31, 2018 670,606 $ 24.71 Awarded 2,524,441 21.60 Released (140,022 ) 20.40 Cancelled (230,136 ) 28.93 Balance as of June 30, 2019 2,824,889 $ 21.79 Vested and expected to vest as of June 30, 2019 2,277,893 $ 21.77

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Loss Per Share	The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share data): Three Months Ended Six Months Ended 2019 2018 2019 2018 Net loss $ (14,833 ) $ (24,603 ) $ (24,831 ) $ (15,580 ) Weighted-average shares used in computing net loss per share, basic and diluted 81,369 21,886 80,049 21,289 Net loss per share, basic and diluted $ (0.18 ) $ (1.12 ) $ (0.31 ) $ (0.73 )
Potentially Dilutive Securities Excluded from the Computation of Diluted Net Loss Per Share	The following outstanding shares of potentially dilutive securities were excluded from the computation of diluted net loss per share because including them would have had an anti-dilutive effect (in thousands): June 30, 2019 2018 Redeemable convertible preferred stock (on an if-converted basis) — 41,628 Options to purchase common stock 18,622 18,483 Redeemable convertible preferred stock warrants — 933 Restricted stock units 2,784 1,033 Early exercised options 42 79 Total 21,448 62,156

Geographic Information (Tables)

Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Net Revenue By Geography	The following table presents the Company's total net revenue by geography based on the currency of the underlying transaction for the periods indicated (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 United States $ 58,687 $ 47,206 $ 118,471 $ 104,491 International 22,071 20,336 43,613 37,577 Total net revenue $ 80,758 $ 67,542 $ 162,084 $ 142,068

Organization (Details)

Organization (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
	Sep. 30, 2018	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Class of Stock [Line Items]
Offering costs		$ 0		$ 183	$ 413	$ 183
Conversion of redeemable convertible preferred stock in connection with initial public offering (in shares)	41,628,207
Series G Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Outstanding warrants to purchase Series G redeemable preferred stock (in shares)	933,269
IPO
Class of Stock [Line Items]
Offering price (in dollars per share)	$ 23
Aggregate net proceeds	$ 246,000
Offering costs	$ 5,500
Class A Common Stock | Common Stock
Class of Stock [Line Items]
Conversion of redeemable convertible preferred stock in connection with initial public offering (in shares)		11,491,455	21,095,075
Class A Common Stock | IPO
Class of Stock [Line Items]
Shares issued in initial public offering (in shares)	11,500,000
Offering price (in dollars per share)	$ 23
Class A Common Stock | Over-Allotment Option
Class of Stock [Line Items]
Shares issued in initial public offering (in shares)	1,500,000
Class B Common Stock | Common Stock
Class of Stock [Line Items]
Conversion of redeemable convertible preferred stock in connection with initial public offering (in shares)		(11,491,455)	(21,095,075)
Class B Common Stock | Common Stock | Conversion of Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Conversion of redeemable convertible preferred stock in connection with initial public offering (in shares)	42,188,624
Class B Common Stock | Common Stock | Conversion of Warrants
Class of Stock [Line Items]
Conversion of redeemable convertible preferred stock in connection with initial public offering (in shares)	997,193

Significant Accounting Polici_4

Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Sales, marketing and support	[1]	$ 25,872		$ 21,513	$ 47,434	$ 42,229
General and administrative	[1]	22,051		18,405	47,178	38,388
Cumulative effect adjustment upon adoption of ASU 2014-09							$ (600)
Cash and cash equivalents		500,962	$ 533,873	$ 261,269	500,962	$ 261,269		$ 439,400	$ 270,663	$ 192,221
Funds receivable		46,582			46,582			58,697
Tickets Sold on Behalf of Creators
Significant Accounting Policies [Line Items]
Funds receivable		43,500			43,500			54,800
Creator Cash
Significant Accounting Policies [Line Items]
Cash and cash equivalents		279,500			279,500			$ 217,400
Restatement Adjustment
Significant Accounting Policies [Line Items]
Sales, marketing and support		3,400	400		6,600
General and administrative		$ (3,400)	$ (400)		$ (6,600)
Accumulated Deficit
Significant Accounting Policies [Line Items]
Cumulative effect adjustment upon adoption of ASU 2014-09							(600)
Difference between Revenue Guidance in Effect before and after Topic 606 | ASU 2014-09
Significant Accounting Policies [Line Items]
Contract liabilities							600
Difference between Revenue Guidance in Effect before and after Topic 606 | Accumulated Deficit | ASU 2014-09
Significant Accounting Policies [Line Items]
Cumulative effect adjustment upon adoption of ASU 2014-09							$ (600)
[1]	(1) Includes stock-based compensation as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017Cost of net revenue$325 $71 $569 $124Product development2,187 747 4,225 1,348Sales, marketing and support1,246 864 2,469 1,578General and administrative4,948 3,566 9,570 5,058

Significant Accounting Polici_5

Significant Accounting Policies - Schedule of Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 500,454		$ 437,892
Restricted cash	508		1,508
Total cash, cash equivalents and restricted cash	$ 500,962	$ 533,873	$ 439,400	$ 261,269	$ 270,663	$ 192,221

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - Ticketea S.L. - USD ($) shares in Millions, $ in Millions	1 Months Ended	6 Months Ended
	Apr. 30, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Consideration transferred	$ 11.4
Payments to acquire businesses	$ 3.9
Shares issued as consideration (in shares)	0.7
Number of shares held in escrow (in shares)	0.1
Escrow period	18 months
Acquisition costs		$ 0.5

Acquisitions - Asset Allocation

Acquisitions - Asset Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Apr. 30, 2018
Business Acquisition [Line Items]
Goodwill	$ 170,560	$ 170,560
Ticketea S.L.
Business Acquisition [Line Items]
Cash and restricted cash			$ 17,852
Funds and accounts receivable			1,058
Creator advances			532
Prepaid expenses and other current assets			94
Property and equipment			42
Other noncurrent assets			28
Accounts payable, creators			(19,671)
Other current liabilities			(529)
Intangible assets			3,094
Goodwill			8,937
Total purchase price			$ 11,437

Acquisitions - Acquired Intangi

Acquisitions - Acquired Intangible Assets (Details) - Ticketea S.L. $ in Thousands	1 Months Ended
	Apr. 30, 2018USD ($)
Business Acquisition [Line Items]
Acquired intangible assets	$ 3,094
Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets	$ 2,475
Weighted- average remaining useful life (years)	5 years
Developed technology
Business Acquisition [Line Items]
Acquired intangible assets	$ 619
Weighted- average remaining useful life (years)	1 year

Accounts Receivable, Net (Detai

Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Accounts receivable, customers	$ 6,706	$ 5,651
Allowance for doubtful accounts	(2,338)	(1,582)
Accounts receivable, net	$ 4,368	$ 4,069

Creator Signing Fees, Net (Deta

Creator Signing Fees, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Creator signing fees, amortization period	3 years 4 months 7 days		3 years 4 months 7 days
Activity in creator signing fees:
Beginning balance	$ 19,120	$ 12,571	$ 17,005	$ 10,421
Creator signing fees paid	4,630	2,626	9,188	6,279
Amortization of creator signing fees	(2,522)	(1,713)	(4,915)	(3,077)
Write-offs and other adjustments	(465)	(206)	(515)	(345)
Ending balance	20,763	13,278	20,763	13,278
Creator signing fees, net	8,245	7,324	8,245	7,324	$ 7,324
Creator signing fees, noncurrent	$ 12,518	$ 9,681	$ 12,518	$ 9,681	$ 9,681

Creator Advances, Net (Details)

Creator Advances, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Activity In Notes, Loans And Financing Receivable [Roll Forward]
Balance, beginning of period	$ 26,734	$ 22,129	$ 23,142	$ 20,076
Acquired with Ticketea transaction	0	532	0	532
Creator advances paid	9,316	3,659	19,084	10,248
Creator advances recouped	(4,914)	(3,874)	(10,663)	(7,917)
Write-offs and other adjustments	(2,420)	(845)	(2,847)	(1,338)
Balance, end of period	28,716	21,601	28,716	21,601
Creator advances, net	26,182	21,255	26,182	21,255	$ 21,255
Creator advances, noncurrent	$ 2,534	$ 1,887	$ 2,534	$ 1,887	$ 1,887

Property, Plant and Equipment_3

Property, Plant and Equipment, Net - Summary of Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 97,236	$ 88,795
Less: Accumulated depreciation and amortization	(50,985)	(44,576)
Property, plant and equipment, net	46,251	44,219
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	33,277	33,277
Capitalized internal-use software development costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	40,123	35,201
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,512	3,557
Computers and computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	14,163	11,676
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 6,161	$ 5,084

Property, Plant and Equipment_4

Property, Plant and Equipment, Net - Capitalized Internal-Use Software Development Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 1,599	$ 1,221	$ 3,236	$ 2,363
Capitalized internal-use software development costs	2,614	2,115	4,922	4,562
Stock-based compensation costs included in capitalized internal-use software development costs	448	123	651	279
Amortization of capitalized internal-use software development costs	$ 1,799	$ 1,570	$ 3,499	$ 3,046

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangible Assets, Net - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 170,560	$ 170,560

Goodwill and Acquired Intangi_4

Goodwill and Acquired Intangible Assets, Net - Acquired Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Acquired intangible assets, net:
Cost	$ 95,180	$ 95,180
Accumulated amortization	40,690	35,207
Acquired intangible assets, net	54,490	59,973
Developed technology
Acquired intangible assets, net:
Cost	19,096	19,096
Accumulated amortization	18,952	18,628
Acquired intangible assets, net	$ 144	$ 468
Weighted- average remaining useful life (years)	8 months 24 days	9 months 15 days
Customer relationships
Acquired intangible assets, net:
Cost	$ 74,484	$ 74,484
Accumulated amortization	20,138	14,979
Acquired intangible assets, net	$ 54,346	$ 59,505
Weighted- average remaining useful life (years)	5 years 8 months 24 days	6 years 2 months 12 days
Tradenames
Acquired intangible assets, net:
Cost	$ 1,600	$ 1,600
Accumulated amortization	1,600	1,600
Acquired intangible assets, net	$ 0	$ 0
Weighted- average remaining useful life (years)

Goodwill and Acquired Intangi_5

Goodwill and Acquired Intangible Assets, Net - Amortization Expense Related to Acquired Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 2,683	$ 5,789	$ 5,483	$ 11,371
Cost of net revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	95	2,949	324	5,821
Sales, marketing and support
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	2,588	2,539	5,159	4,973
General and administrative
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 0	$ 301	$ 0	$ 577

Goodwill and Acquired Intangi_6

Goodwill and Acquired Intangible Assets, Net - Total Expected Future Amortization Expense for Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
The remainder of 2019	$ 5,342
2020	10,443
2021	10,197
2022	8,202
2023	7,709
Thereafter	12,597
Acquired intangible assets, net	$ 54,490	$ 59,973

Term Loans and Promissory Not_2

Term Loans and Promissory Note - Narrative (Details) - USD ($)

1 Months Ended

3 Months Ended

6 Months Ended

Jun. 30, 2019

Sep. 30, 2018

May 31, 2018

Mar. 31, 2018

Sep. 30, 2017

Jun. 30, 2019

Jun. 30, 2018

Jun. 30, 2019

Jun. 30, 2018

Sep. 30, 2022

Sep. 30, 2021

Sep. 30, 2020

Sep. 30, 2019

Jun. 30, 2017

Line of Credit Facility [Line Items]

Proceeds from term loans

$ 0

$ 15,000,000

$ 0

$ 45,000,000

Fair value of embedded derivative asset

2,100,000

2,100,000

Total cash repayment of long-term debt

11,406,000

165,000

11,406,000

35,455,000

Gain on debt extinguishment

$ 0

$ 0

$ 0

$ 16,995,000

Line of Credit | Term Loan | First Western Technology Investments Loan Facility

Line of Credit Facility [Line Items]

Maximum borrowing capacity

$ 60,000,000

Line of Credit | Term Loan | First Loan Facility Due February 2022

Line of Credit Facility [Line Items]

Proceeds from term loans

$ 30,000,000

Annual interest rate

11.50%

Effective interest rate

15.90%

Line of Credit | Term Loan | First Loan Facility Due September 2022

Line of Credit Facility [Line Items]

Proceeds from term loans

$ 30,000,000

Annual interest rate

11.75%

Effective interest rate

14.80%

Period for which monthly payments of interest due

24 months

Period for which monthly payments of interest and principal due

30 months

Line of Credit | Term Loan | Second Western Technology Investments Loan Facility

Line of Credit Facility [Line Items]

Maximum borrowing capacity

$ 15,000,000

Annual interest rate

12.00%

Effective interest rate

14.70%

Period for which monthly payments of interest due

24 months

Period for which monthly payments of interest and principal due

30 months

Prepayment covenant period following consummation of IPO

15 days

Prepayment covenant percentage of interest incurred through the end of 24 months due

50.00%

Line of Credit | Term Loan | Senior Secured Credit Facility

Line of Credit Facility [Line Items]

Aggregate principal amount

$ 75,000,000

Proceeds from issuance of debt

73,600,000

Payment of debt arrangement fees

1,100,000

Payment of debt upfront fees

$ 300,000

Loan amortization rate

7.50%

Annual rate

4.83%

Total cash repayment of long-term debt

$ 10,000,000

Line of Credit | Term Loan | Scenario, Forecast | Senior Secured Credit Facility

Line of Credit Facility [Line Items]

Loan amortization rate

10.00%

10.00%

10.00%

7.50%

Line of Credit | Revolving Credit Facility | Senior Secured Credit Facility

Line of Credit Facility [Line Items]

Maximum borrowing capacity

$ 75,000,000

Commitment fee rate

0.40%

Convertible Notes Payable | Promissory Note

Line of Credit Facility [Line Items]

Annual interest rate

6.50%

Payments to acquire businesses

$ 151,100,000

Consideration transferred liabilities incurred

$ 50,000,000

Notes Payable, Other Payables | Promissory Note

Line of Credit Facility [Line Items]

Aggregate principal amount

$ 34,700,000

Principal amount of debt settled

33,000,000

Accrued interest of debt settled

1,700,000

Gain on debt extinguishment

$ 17,000,000

Eurodollar | Line of Credit | Revolving Credit Facility | Minimum | Senior Secured Credit Facility

Line of Credit Facility [Line Items]

Basis spread on variable rate

2.25%

Eurodollar | Line of Credit | Revolving Credit Facility | Maximum | Senior Secured Credit Facility

Line of Credit Facility [Line Items]

Basis spread on variable rate

2.75%

Base Rate | Line of Credit | Revolving Credit Facility | Minimum | Senior Secured Credit Facility

Line of Credit Facility [Line Items]

Basis spread on variable rate

1.25%

Base Rate | Line of Credit | Revolving Credit Facility | Maximum | Senior Secured Credit Facility

Line of Credit Facility [Line Items]

Basis spread on variable rate

1.75%

Ticketfly, LLC

Line of Credit Facility [Line Items]

Percentage of interests acquired

100.00%

Consideration transferred

$ 201,100,000

Term Loans and Promissory Not_3

Term Loans and Promissory Note - Term Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Outstanding principal balance	$ 62,187	$ 73,594
Accrued but unpaid interest	25	0
Less: Unamortized discount and debt issuance costs	(768)	(872)
Total term loan, net	61,444	72,722
Current portion of term loans	5,650	5,635
Term loans	$ 55,794	$ 67,087

Term Loans and Promissory Not_4

Term Loans and Promissory Note - Contractual Principal Payments for the Next Five Years (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total	$ 62,187	$ 73,594
Term Loan | Line of Credit | Senior Secured Credit Facility
Debt Instrument [Line Items]
The remainder of 2019	2,812
2020	6,094
2021	7,500
2022	7,500
2023	38,281
Total	$ 62,187

Redeemable Convertible Prefer_2

Redeemable Convertible Preferred Stock Warrants - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended
	May 31, 2018	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017
Class of Warrant or Right [Line Items]
Proceeds from term loans			$ 0	$ 15,000,000	$ 0	$ 45,000,000
Exercise price of Series G redeemable convertible preferred stock warrants (in dollars per share)	$ 16.3836
Expiration period	10 years
Change in fair value of redeemable convertible preferred stock warrant liability			$ 0	$ 4,750,000	$ 0	$ 6,071,000
Line of Credit | Term Loan | First Loan Facility Due February 2022
Class of Warrant or Right [Line Items]
Proceeds from term loans		$ 30,000,000
June 2017 Preferred Stock Warrants
Class of Warrant or Right [Line Items]
Outstanding warrants to purchase Series G redeemable preferred stock (in shares)								411,991
September 2017 Preferred Stock Warrants
Class of Warrant or Right [Line Items]
Outstanding warrants to purchase Series G redeemable preferred stock (in shares)		205,995
March 2018 Preferred Stock Warrants
Class of Warrant or Right [Line Items]
Outstanding warrants to purchase Series G redeemable preferred stock (in shares)							205,995
May 2018 Preferred Stock Warrants
Class of Warrant or Right [Line Items]
Outstanding warrants to purchase Series G redeemable preferred stock (in shares)	109,288

Commitments and Contingencies -

Commitments and Contingencies - Operating Leases and Build-to-Suit Lease (Details) $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended
	Dec. 31, 2013USD ($)ft²	Jun. 30, 2019USD ($)	Mar. 31, 2019	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Rent expense from operating leases		$ 1		$ 0.6	$ 2.1	$ 1.1
Sublease income		1		0.8	1.9	1.6
Area of office space (in square feet) | ft²	97,624
Capital Leased Assets [Line Items]
Initial built-to-suit lease term	7 years
Renewal term	3 years
Tenant improvement reimbursement allowance	$ 6.4
Capital lease asset	$ 22.3
Land lease expense		0.2		0.2	0.5	0.5
Interest expense related to build-to-suit lease		$ 0.8		$ 0.9	$ 1.7	$ 1.7
Building
Capital Leased Assets [Line Items]
Estimated useful life			30 years

Commitments and Contingencies_2

Commitments and Contingencies - Future Minimum Lease Payments and Sublease Rental Payments under Noncancelable Operating Leases (Details) $ in Thousands	Jun. 30, 2019USD ($)
Capital Leases
Remainder of 2019	$ 144
2020	230
2021	172
2022	86
2023	0
Thereafter	0
Total minimum lease payments	632
Total	632
Build-to-Suit Lease
The remainder of 2019	2,829
2020	5,772
2021	1,943
2022	0
2023	0
Thereafter	0
Total minimum lease payments	10,544
Less: Amount representing interest and taxes	(5,888)
Total	4,656
Operating Leases
The remainder of 2019	1,955
2020	3,844
2021	3,440
2022	3,185
2023	2,836
Thereafter	4,392
Total	19,652
Sublease Income
The remainder of 2019	(2,061)
2020	(4,205)
2021	(1,239)
2022	0
2023	0
Thereafter	0
Total	(7,505)
Total
The remainder of 2019	2,867
2020	5,641
2021	4,316
2022	3,271
2023	2,836
Thereafter	4,392
Total minimum lease payments	23,323
Total	$ 17,435

Commitments and Contingencies_3

Commitments and Contingencies - Letters of Credit (Details) $ in Millions	Jun. 30, 2019USD ($)
San Francisco Office Space Leases
Line of Credit Facility [Line Items]
Collateralizing letter of credit amount	$ 1

Commitments and Contingencies_4

Commitments and Contingencies - Future Creator Payments Committed to under Contract but Not Yet Paid (Details) - Future Creator Payments $ in Thousands	Jun. 30, 2019USD ($)
Other Commitments [Line Items]
Remainder of 2019	$ 6,153
2020	12,265
2021	5,024
2022	2,042
2023	1,313
Thereafter	0
Total	$ 26,797

Commitments and Contingencies_5

Commitments and Contingencies - Litigation and Loss Contingencies (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Loss Contingencies [Line Items]
Loss contingency accrual	$ 14.7		$ 14.7		$ 19.2
Estimate of possible loss attributable to potential interest and penalties	1.3		1.3		$ 1.2
Ticketfly Customer Data Breach
Loss Contingencies [Line Items]
Potential costs associated with incident				$ 6.6
Insurance proceeds	$ 2.7		$ 3
Ticketfly Customer Data Breach | Contra Revenue
Loss Contingencies [Line Items]
Potential costs associated with incident		$ 6.3		6.3
Ticketfly Customer Data Breach | Operating Expenses
Loss Contingencies [Line Items]
Potential costs associated with incident				$ 0.3

Stockholders' Equity - Common S

Stockholders' Equity - Common Stock (Details)	May 31, 2019shares	Jan. 31, 2019shares	Aug. 31, 2018	Jun. 30, 2019USD ($)shares	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)voteshares	Jun. 30, 2018USD ($)	Dec. 31, 2018shares	Dec. 31, 2010shares	Dec. 31, 2004shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued and outstanding (in shares)				18,622,464		18,622,464		22,012,597
Stock-based compensation expense | $				$ 8,706,000	$ 5,248,000	$ 16,833,000	$ 8,108,000
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of votes per share | vote						1
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of votes per share | vote						10
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $				$ 200,000	$ 0	$ 500,000	$ 0
2004 Plan, 2010 Plan and 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued and outstanding (in shares)				18,622,464		18,622,464
Number of shares available for grant (in shares)				12,101,221		12,101,221
2004 Plan, 2010 Plan and 2018 Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						4 years
Expiration period						10 years
2004 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)										6,000,000
2010 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)									29,963,761
2018 Stock Option and Incentive Plan | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)				7,745,819		7,745,819
2018 Employee Stock Purchase Plan (ESPP) | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)				2,318,083		2,318,083
2018 Employee Stock Purchase Plan (ESPP) | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum annual contribution percentage per employee			15.00%
Fair vale purchase price percentage			85.00%
2018 Employee Stock Purchase Plan (ESPP) | Employee Stock | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)				2,150,377		2,150,377
Additional shares reserved for future issuance (in shares)		783,583
Common Stock | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock for ESPP Purchase (in shares)	167,706			167,706

Stockholders' Equity - Stock Op

Stockholders' Equity - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares
Outstanding options
Balance (in shares) | shares	22,012,597
Granted (in shares) | shares	1,174,160
Exercised (in shares) | shares	(3,819,674)
Cancelled (in shares) | shares	(744,619)
Balance (in shares) | shares	18,622,464	22,012,597
Vested and exercisable (in shares) | shares	10,860,362	12,462,693
Vested and expected to vest (in shares) | shares	17,844,757	20,926,797
Weighted- average exercise price
Balance (in dollars per share) | $ / shares	$ 7.85
Granted (in dollars per share) | $ / shares	17.96
Exercised (in dollars per share) | $ / shares	6.01
Cancelled (in dollars per share) | $ / shares	12.74
Balance (in dollars per share) | $ / shares	8.67	$ 7.85
Vested and exercisable (in dollars per share) | $ / shares	6.51	5.75
Vested and expected to vest (in dollars per share) | $ / shares	$ 8.53	$ 7.69
Weighted- average remaining contractual term
Outstanding	6 years 8 months 13 days	7 years 26 days
Vested and exercisable	5 years 3 months 8 days	5 years 7 months 15 days
Vested and expected to vest	6 years 7 months 7 days	6 years 12 months 15 days
Aggregate intrinsic value
Outstanding | $	$ 140,970	$ 439,382
Exercised | $	23,869
Vested and exercisable | $	105,536	274,883
Vested and expected to vest | $	$ 137,576	$ 421,047

Stockholders' Equity - Common_2

Stockholders' Equity - Common Stock Subject to Repurchase (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Equity [Abstract]
Common stock subject to repurchase related to stock options (in shares)	42,463	55,537
Liability related to early exercises of stock options	$ 0.4	$ 0.4

Stockholders' Equity - Assumpti

Stockholders' Equity - Assumptions Used to Estimate the Fair Value of Stock Options (Details) - Stock Options	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Expected term		6 years 30 days		6 years 30 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	49.20%		49.20%	48.30%
Risk-free interest rate	1.85%		1.85%	2.32%
Expected term	5 years 1 month 16 days		5 years 1 month 16 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	49.40%	52.90%	49.70%	52.90%
Risk-free interest rate	1.95%	2.55%	2.58%	2.61%
Expected term	6 years 29 days		6 years 29 days

Stockholders' Equity - Stock-ba

Stockholders' Equity - Stock-based Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of stock options granted (in dollars per share)	$ 8.02	$ 6.61	$ 8.84	$ 5.88
Compensation expense not yet recognized	$ 46.9		$ 46.9		$ 51.3
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average recognition period for unrecognized stock-based compensation			2 years 6 months 17 days		2 years 8 months 23 days

Stockholders' Equity - Restrict

Stockholders' Equity - Restricted Stock Units (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 8,706,000	$ 5,248,000	$ 16,833,000	$ 8,108,000
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	3,700,000	$ 0	6,100,000	$ 0
Stock-based compensation expense, not yet recognized	$ 49,100,000		$ 49,100,000
Weighted-average recognition period for unrecognized stock-based compensation			3 years 7 months 25 days

Stockholders' Equity - Restri_2

Stockholders' Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Outstanding RSUs
Balance at December 31, 2018 (in shares) | shares	670,606
Awarded (in shares) | shares	2,524,441
Released (in shares) | shares	(140,022)
Cancelled (in shares) | shares	(230,136)
Balance at June 30, 2019 (in shares) | shares	2,824,889
Vested and expected to vest as of June 30, 2019 (in shares) | shares	2,277,893
Weighted-average grant date fair value per share
Balance at December 31, 2018 (in usd per share) | $ / shares	$ 24.71
Awarded (in usd per share) | $ / shares	21.60
Released (in usd per share) | $ / shares	20.40
Cancelled (in usd per share) | $ / shares	28.93
Balance at June 30, 2019 (in usd per share) | $ / shares	21.79
Vested and expected to vest as of June 30, 2019 (in usd per share) | $ / shares	$ 21.77

Stockholders' Equity - Sales of

Stockholders' Equity - Sales of the Company's Stock (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Class of Stock [Line Items]
Excess of purchase price over fair value recognized as compensation expense		$ 8,706	$ 5,248	$ 16,833	$ 8,108
Sale of the Company's Common Stock to Entities Affiliated with Existing Investor
Class of Stock [Line Items]
Common stock sold by employees and former employees (in shares)	1.3
Share price of stock sold by employees (in dollars per shares)	$ 13.12
Aggregate purchase price	$ 17,200
Stock Compensation Plan
Class of Stock [Line Items]
Excess of purchase price over fair value recognized as compensation expense			2,200
General and administrative
Class of Stock [Line Items]
Excess of purchase price over fair value recognized as compensation expense		4,948	3,566	9,570	5,058
General and administrative | Stock Compensation Plan
Class of Stock [Line Items]
Excess of purchase price over fair value recognized as compensation expense			2,000
Sales, marketing and support
Class of Stock [Line Items]
Excess of purchase price over fair value recognized as compensation expense		$ 1,246	864	$ 2,469	$ 1,578
Sales, marketing and support | Stock Compensation Plan
Class of Stock [Line Items]
Excess of purchase price over fair value recognized as compensation expense			$ 200

Net Loss Per Share - Computatio

Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net loss	$ (14,833)	$ (9,998)	$ (24,603)	$ 9,023	$ (24,831)	$ (15,580)
Weighted-average shares used in computing net loss per share, basic and diluted (in shares)	81,369		21,886		80,049	21,289
Net loss per share, basic and diluted (in dollars per share)	$ (0.18)		$ (1.12)		$ (0.31)	$ (0.73)

Net Loss Per Share - Potentiall

Net Loss Per Share - Potentially Dilutive Securities Excluded from the Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares)	21,448	62,156
Redeemable convertible preferred stock (on an if-converted basis)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares)	0	41,628
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares)	18,622	18,483
Redeemable convertible preferred stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares)	0	933
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares)	2,784	1,033
Early exercised options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net loss per share (in shares)	42	79

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ (1,193)	$ 430	$ (1,093)	$ 800

Geographic Information - Net Re

Geographic Information - Net Revenue By Geography (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net revenue	$ 80,758	$ 67,542	$ 162,084	$ 142,068
United States
Segment Reporting Information [Line Items]
Net revenue	58,687	47,206	118,471	104,491
International
Segment Reporting Information [Line Items]
Net revenue	$ 22,071	$ 20,336	$ 43,613	$ 37,577

Geographic Information - Narrat

Geographic Information - Narrative (Details) - Ticketfly Customer Data Breach - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Loss Contingencies [Line Items]
Potential costs associated with incident		$ 6.6
Contra Revenue
Loss Contingencies [Line Items]
Potential costs associated with incident	$ 6.3	$ 6.3

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event $ in Millions	Jul. 16, 2019complaint	Jul. 31, 2019USD ($)
Subsequent Event [Line Items]
Customer refund expense | $		$ 4
New complaints filed | complaint	2