Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of Reserved Shares of Common Stock for Issuance

As of September 30, 2021, the Company had reserved shares of common stock for issuance as follows (in thousands):

	As of September 30, 2021
Common stock awards granted under equity incentive plans		10,397
Common stock awards available for issuance under the 2017 Employee Stock Purchase Plan(1)		5,089
Common stock awards available for issuance under the 2017 Equity Incentive Plan		27,056
Total reserved shares of common stock		42,542

⁽¹⁾ The Company has not issued any common stock pursuant to the 2017 Employee Stock Purchase Plan.

Summary of Restricted Stock Unit Activity

The following table summarizes the Company’s restricted stock unit activities for the nine months ended September 30, 2021 (in thousands, except per share data):

	Number of Shares			Weighted-Average Grant Date Fair Value per Share
Balance as of December 31, 2020		4,355		$	92.91
Awarded		790			365.21
Released		(1,243	)		78.20
Forfeited		(278	)		120.84
Balance as of September 30, 2021		3,624		$	155.14

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activities for the nine months ended September 30, 2021 (in thousands, except years and per share data):

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Balance as of December 31, 2020		8,733		$	26.19		5.7
Granted		318			356.94		—
Exercised		(2,272	)		5.91		—
Forfeited and expired		(6	)		16.86		—
Balance as of September 30, 2021		6,773		$	48.54		5.8	$	1,807,297
Options exercisable as of September 30, 2021		4,950		$	12.36		4.9	$	1,490,537

Schedule of Stock-based Compensation Expense

The following table shows the total stock-based compensation expense for the three and nine months ended September 30, 2021 and 2020 (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Cost of platform revenue	$	199	$	206	$	564	$	649
Cost of player revenue		618		362		1,348		1,010
Research and development		20,893		14,873		56,024		41,476
Sales and marketing		16,591		11,572		44,229		31,244
General and administrative		12,095		7,894		31,314		20,969
Total stock-based compensation	$	50,396	$	34,907	$	133,479	$	95,348