Stock-based compensation (Tables)

3 Months Ended

Mar. 31, 2022

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

Stock option activity for the three months ended March 31, 2022 is as follows:

	Number of Shares Underlying Outstanding Options	Weighted- Average Exercise Price per Share		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding—December 31, 2021	24,129,096	$	1.01	8.6	$	100,992
Options exercised	(797,380)	0.20
Options cancelled	(77,753)	4.21			$	—
Outstanding—March 31, 2022	23,253,963	$	1.03	8.3	$	84,888
Vested and expected to vest—March 31, 2022	23,253,963	$	1.03	8.3	$	84,888
Exercisable—March 31, 2022	9,954,974	$	0.80	8.1	$	37,186

Schedule of Stock Options Outstanding and Exercisable

The following table summarizes information about stock options outstanding and exercisable at March 31, 2022.

		Options Outstanding				Options Exercisable
Exercise Price		Options Outstanding	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price		Options Exercisable	Weighted Average Exercise Price
$	0.18	5,037,657	8.3	$	0.18	3,256,438	$	0.18
$	0.21	9,300,668	8.5	$	0.21	3,454,922	$	0.21
$	1.42	7,524,114	8.5	$	1.42	2,664,790	$	1.42
$	1.49	40,581	5.8	$	1.49	40,418	$	1.49
$	5.24	705,146	4.0	$	5.24	538,406	$	5.24
$	10.26	645,797	9.1	$	10.26	—	$	—
		23,253,963				9,954,974

Schedule of Nonvested Restricted Stock Awards Activity

A summary of RSU activity is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value (per share)
Unvested – December 31, 2021	9,326,572	$	7.82
Granted during the period	3,983,474	4.25
Canceled during the period	(1,559,964)	6.44
Vested during the period	(828,921)	7.46
Unvested — March 31, 2022	10,921,161	$	6.75

Schedule of Stock-based Compensation

Stock-based compensation expense is included in costs and expenses as follows (in thousands):

	Three Months Ended March 31,
	2022		2021
Cost of revenue	$	217	$	118
Research and development	3,761		921
Sales and marketing	1,524		265
General and administrative	3,248		3,952
Total stock-based compensation	$	8,750	$	5,256

The following table summarizes stock-based compensation expense by award type (in thousands):

	Three Months Ended March 31,
	2022		2021
RSUs	$	5,901	$	313
Stock options	2,840		4,937
RSAs	9		6
Total stock-based compensation	$	8,750	$	5,256