Stock-based compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Service Vesting-Based Stock Option Activity

The following is a summary of service vesting-based stock option activity for the June 30, 2023, and the status of service vesting-based stock options outstanding as of June 30, 2023:

	Six Months Ended June 30, 2023
	Options	Wtd. Avg. Exercise Price
Outstanding as of beginning of year	456,293	$	2.17
Exercised	(144,043)	2.13
Outstanding as of June 30, 2023	312,250	$	2.18
Stock options exercisable as of June 30, 2023	312,250	$	2.18

Summary of Service Vesting-Based and Market Based Restricted Stock Activity

The following is a summary of service vesting-based restricted stock activity for the three and six months ended June 30, 2023, and the status of unvested service vesting-based restricted stock outstanding as of June 30, 2023:

	Six Months Ended June 30, 2023
	Shares	Wtd. Avg. Grant Date Fair Value
Outstanding as of beginning of year	1,879,215	$	28.94
Granted	509,629	18.13
Vested	(534,411)	26.42
Forfeited	(115,038)	28.73
Non-vested as of June 30, 2023	1,739,395	$	26.56

The following is a summary of market-based restricted stock activity under our stock option plan for the three and six months ended June 30, 2023 and the status of market-based restricted stock outstanding as of June 30, 2023:

	Six Months Ended June 30, 2023
	Shares	Wtd. Avg. Grant
Outstanding as of beginning of year	271,044	$	30.64
Granted	268,738	24.23
Vested	(30,616)	51.65
Non-vested as of June 30, 2023	509,166	$	26.00

Summary of Stock Compensation Expense

We recorded total stock compensation expense for the three and six months ended June 30, 2023 and 2022, as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(In thousands)	2023		2022		2023		2022
Cost of revenue	$	1,212	$	802	$	2,844	$	1,809
General and administrative costs	3,555		3,719		6,848		6,729
Sales and marketing costs	1,082		738		2,338		1,443
Research and development costs	1,007		714		2,190		1,391
Total	$	6,856	$	5,973	$	14,220	$	11,372