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Employee benefit plans (Tables)

12 Months Ended

Dec. 31, 2022

A summary of the Company’s PSU activity is as follows:


	Shares (in thousands)	Weighted-average grant date fair value
Non-vested shares at December 31, 2021	1,134	$	6.68
Granted	604	8.70
Vested	(744)	6.45
Forfeited	(308)	8.46
Non-vested shares at December 31, 2022	686	$	7.93

A summary of the Company’s stock option activity is as follows:


	Shares (in thousands)	Weighted-average exercise price		Weighted-average remaining contractual term (in years)	Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2021	3,080	$	9.18	5.92	$	8,735
Granted	320	8.70
Exercised	(63)	4.43
Forfeited/Cancelled	(248)	7.40
Outstanding at December 31, 2022	3,089	$	9.37	5.30	$	467

Vested and expected to vest at December 31, 2022	3,089	$	9.37	5.30	$	467
Exercisable at December 31, 2022	2,446	$	9.97	4.53	$	288

A summary of the Company’s RSU activity is as follows:


	Shares (in thousands)	Weighted-average grant date fair value
Non-vested shares at December 31, 2021	8,714	$	6.52
Granted	5,813	7.68
Vested	(4,644)	6.64
Forfeited	(1,156)	6.86
Non-vested shares at December 31, 2022	8,727	$	7.19

The following table summarizes stock-based compensation expense included in the Consolidated Statements of Operations:


	Year ended December 31,
(in thousands)		2022		2021		2020
Cost of revenue		$	1,805	$	1,794	$	1,548
Research and development		17,221		17,263		13,415
Sales and marketing		8,173		8,045		5,779
General and administrative		11,792		11,548		9,221
Total stock-based compensation expense		$	38,991	$	38,650	$	29,963


(in thousands, except per share data)	2022
Shares repurchased	5,967
Average price per share	$	6.64
Value of shares repurchased	$	39,618