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Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Based Compensation Cost

We recorded stock-based compensation expense in the following categories in the accompanying consolidated statements of operations and balance sheets (in thousands):

			Year Ended December 31,
			2023						2022						2021
Cost of revenue			$	4,318					$	2,931					$	1,733
Sales and marketing			6,096						10,144						15,746
Technology and development			18,899						16,574						38,796
General and administrative			36,702						50,820						56,557
Total stock-based compensation expense			66,015						80,469						112,832
Amount capitalized to internal-use software			4,056						2,526						674
Total stock-based compensation			$	70,071					$	82,995					$	113,506

Schedule of Stock Options Activity

Stock option activity for the year ended December 31, 2023 is as follows (in thousands, except weighted-average exercise price and remaining contract life):

			Number of Options						Weighted- Average Exercise Price						Weighted- Average Remaining Contractual Life (in Years)						Aggregate Intrinsic Value
Outstanding at December 31, 2022			17,155						$	11.13					7.1						$	3,698
Granted			4,181						8.54
Exercised			(743)						8.20
Cancelled			(19)						9.77
Forfeited			(88)						9.44
Outstanding at December 31, 2023			20,486						$	10.69					6.9						$	34,571
Vested and expected to vest at December 31, 2023			20,486						$	10.69					6.9						$	34,571
Exercisable at December 31, 2023			14,021						$	10.53					6.1						$	22,332

Schedule of Fair Value Assumptions and Techniques for Stock Options

The weighted-average assumptions that were used to calculate the grant-date fair value of our stock option grants using the Black-Scholes option pricing model were as follows:

			Year Ended December 31,
			2023						2022						2021
Expected life (years)			5.9						5.6						5.4
Risk-free interest rate			3.4%-3.8%						2.6		%				1.0		%
Expected volatility			50.4%-50.7%						48		%				46		%
Expected dividend yield			—						—						—

Schedule of Restricted Stock Unit Activity

A summary of RSUs and performance stock units, or PSUs, activity for the year ended December 31, 2023 is as follows (in thousands, except weighted-average grant-date fair value):

			Number of Units						Weighted- Average Grant- Date Fair Value
Unvested at December 31, 2022			8,879						$	14.76
Granted			9,974						8.87
Cancelled/forfeited			(1,405)						10.72
Vested			(3,441)						15.33
Unvested at December 31, 2023			14,007						$	10.83

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