Stock-based compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of stock-based compensation

Employee stock-based compensation cost recognized in the consolidated statements of loss and comprehensive loss was as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(in thousands)
Cost of revenue	$	520	$	272	$	980	$	521
Engineering, research, and development	1,020		1,638		2,673		2,502
Sales and marketing	823		1,207		1,878		1,878
General and administrative	4,790		13,270		14,879		20,147
Total stock-based compensation	$	7,153	$	16,387	$	20,410	$	25,048

Schedule of option activity

Stock option activity under the Company’s 2018 Plan is set forth below:

	Number of Options	Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Contractual Term (in years)
Options outstanding as of December 31, 2022	1,598,811	$	3.54	$	12,279	6.0
Options exercised	(32,795)	$	3.54
Options outstanding as of June 30, 2023	1,566,016	$	3.54	$	8,942	5.6
Options vested and exercisable as of June 30, 2023	1,519,130	$	3.54	$	8,674	5.5

Stock option activity under the Company’s 2020 Plan is set forth below:

	Number of Options	Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Contractual Term (in years)
Options outstanding as of December 31, 2022	3,003,611	$	13.22	$	3,883	8.3
Options granted	597,000	$	11.68
Options exercised	(2,123)	$	8.20
Options forfeited	(164,708)	$	15.51
Options expired	(14,639)	$	20.71
Options outstanding as of June 30, 2023	3,419,141	$	12.82	$	1,337	7.8
Options vested and exercisable as of June 30, 2023	1,415,499	$	10.90	$	1,069	6.6

Schedule of restricted stock unit activity

The following table summarizes activity of the Company’s RSUs for the six months ended June 30, 2023:

	Number of Shares	Weighted Average Grant Date Fair Value
Unvested awards as of December 31, 2022	2,245,968	$	11.99
Awards granted	143,000	$	11.64
Awards vested and released	(989,969)	$	12.40
Awards forfeited	(101,883)	$	11.22
Unvested awards as of June 30, 2023	1,297,116	$	11.69

Schedule of performance share activity

The following table summarizes activity of the Company's PSUs for the six months ended June 30, 2023:

	Number of Shares	Weighted Average Grant Date Fair Value
Unvested awards as of December 31, 2022	1,328,482	$	39.41
Awards granted	523,938	$	11.97
Awards vested and released	(1,328,482)	$	39.41
Awards forfeited	(32,375)	$	11.97
Unvested awards as of June 30, 2023	491,563	$	11.97