Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Schedule of Reserved Shares of Common Stock for Issuance

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

	As of June 30, 2021
Common stock awards granted under equity incentive plans		10,611
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		27,698
Total reserved shares of common stock		43,398

⁽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 six months ended June 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		306			353.72
Released		(806	)		74.62
Forfeited		(188	)		113.42
Balance as of June 30, 2021		3,667		$	117.65

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activities for the six months ended June 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		67			357.60		—
Exercised		(1,852	)		5.55		—
Forfeited and expired		(4	)		7.56		—
Balance as of June 30, 2021		6,944		$	34.89		5.7	$	2,946,586
Options exercisable as of June 30, 2021		5,108		$	10.77		4.9	$	2,290,669

Schedule of Stock-based Compensation Expense

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

	Three Months Ended				Six Months Ended
	June 30, 2021		June 30, 2020		June 30, 2021		June 30, 2020
Cost of platform revenue	$	167	$	232	$	365	$	443
Cost of player revenue		315		310		730		648
Research and development		18,577		13,348		35,131		26,603
Sales and marketing		14,275		9,615		27,638		19,672
General and administrative		9,212		6,531		19,219		13,075
Total stock-based compensation	$	42,546	$	30,036	$	83,083	$	60,441