Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock-based Compensation

Stock-based compensation recorded in the condensed consolidated statements of operations was as follows:

	Three Months Ended March 31,
	2022		2021
	(in thousands)
Platform operations	$	1,086	$	3,161
Sales and marketing		2,179		6,813
Technology and development		1,169		2,939
General and administrative		1,942		4,177
Total	$	6,376	$	17,090

Summary of RSU Activity

The following summarizes RSU activity:

	Number of Shares (in thousands)			Weighted-Average Grant-Date Fair Value
RSUs outstanding as of December 31, 2021		3,033		$	24.29
Granted		2,284			6.16
Vested		(342	)		25.02
Canceled/forfeited		(117	)		23.92
RSUs outstanding as of March 31, 2022		4,858			15.72

Summary of Nonqualified Stock Option Activity

The following summarizes nonqualified stock option activity:

	Number of Options (in thousands)			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Options outstanding as of    December 31, 2021		220		$	15.88		9.7	$	20
Granted		3,565			6.09
Exercised		—			—
Canceled		(14	)		12.02
Expired		—			—
Options outstanding as of    March 31, 2022		3,771			6.64		9.9		1,891
Vested and exercisable		11			25.86		9.2		—

Summary of Assumptions used in Black-Scholes Model to Determine Fair Value of Nonqualified Stock Options Granted

The following table presents the assumptions used in the Black-Scholes model to determine the fair value of nonqualified stock options for the three months ended March 31, 2022. Black-Scholes assumptions have not been disclosed for any other periods presented as there were no nonqualified stock options granted in those periods.

	Three Months Ended March 31,
	2022
Risk free interest rate		1.4	%
Expected volatility		61.5	%
Expected term (in years)		5.9
Expected dividend yield		0.0	%