Stockholders' equity (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Common Stock Reserved for Future Issuance

As of March 31, 2023 and December 31, 2022, the following shares of common stock were available for future issuance:

	March 31,	December 31,
	2023	2022
2010 Equity Incentive Plan:
Stock options outstanding	9,925,732	10,333,771
2021 Equity Incentive Plan:
RSUs outstanding and PSUs(1)	17,713,184	16,178,101
Shares available for future issuance under:
2021 Equity Incentive Plan	7,324,533	2,814,126
2021 Employee Stock Purchase Plan	3,379,715	1,929,578
Total shares of common stock reserved	38,343,164	31,255,576
(1) The number of PSUs reserved for issuance is based on the maximum achievement of the corporate performance metric.

Summary of Option Activity

The following is a summary of activity for stock options having only service-based vesting conditions under the Equity Incentive Plans:

	Options Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (In Thousands)
Balance - December 31, 2022	10,283,771	$	4.18	6.38	$	66,234
Granted	—	—
Exercised	(355,516)	4.10
Canceled	(52,523)	11.28
Balance - March 31, 2023	9,875,732	$	4.15	3.06	$	47,212
Vested & expected to vest as of March 31, 2023	9,875,732	$	4.15	3.06	$	47,212
Exercisable as of March 31, 2023	8,973,521	$	3.92	2.89	$	44,616

Summary of Stock Appreciation Rights

The following is a summary of activity for SARs under the Equity Incentive Plans:

	SARs Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (In Thousands)
Balance - December 31, 2022	81,770	$	5.44	6.90	$	418
Granted	—	—
Exercised	—	—
Canceled	(9,289)	6.58
Balance - March 31, 2023	72,481	$	5.29	0.57	$	257
Vested & expected to vest as of March 31, 2023	72,481	$	5.29	0.57	$	257
Exercisable as of March 31, 2023	71,706	$	5.28	0.50	$	254

Summary of Restricted Stock Unit Activity

A summary of RSU and PSU activity under the 2021 Plan is as follows:

	RSUs Outstanding	Weighted Average Grant Date Fair Value		PSUs Outstanding	Weighted Average Grant Date Fair Value
Unvested - December 31, 2022	16,178,101	$	17.37	—	$	—
Granted	2,290,999	$	9.84	645,833	$	8.89
Released	(1,257,722)	$	17.91	—	$	—
Canceled	(466,926)	$	15.48	—	$	—
Unvested - March 31, 2023	16,744,452	$	16.35	645,833	$	8.89

Summary of Performance-Based Options

A summary of RSU and PSU activity under the 2021 Plan is as follows:

	RSUs Outstanding	Weighted Average Grant Date Fair Value		PSUs Outstanding	Weighted Average Grant Date Fair Value
Unvested - December 31, 2022	16,178,101	$	17.37	—	$	—
Granted	2,290,999	$	9.84	645,833	$	8.89
Released	(1,257,722)	$	17.91	—	$	—
Canceled	(466,926)	$	15.48	—	$	—
Unvested - March 31, 2023	16,744,452	$	16.35	645,833	$	8.89

Summary of Stock-Based Compensation Expense

Total stock-based compensation expense included in the condensed consolidated statements of operations was as follows (in thousands):

	Three Months Ended March 31,
	2023		2022
Cost of revenue	$	1,593	$	840
Sales and marketing	7,277		4,137
Research and development	6,294		3,334
General and administrative	9,911		5,031
Restructuring charges	1,208		—
Total stock-based compensation expense	$	26,283	$	13,342