Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Stock-Based Compensation

Summary of compensation costs related to stock-based awards

The following table summarizes compensation costs related to our stock-based awards (in thousands, except per share data):

	Three Months Ended
	March 31,
	2023		2022
Cost of revenue	$	105	$	113
Selling, general and administrative		632		811
Research and development		178		164
Net effect on net income (loss)	$	915	$	1,088

Summary of stock option activity

The following table summarizes the stock option transactions during the three months ended March 31, 2023 (in thousands, except per share data):

				Weighted-
				average
		Weighted-		Remaining
	Number of	average		Contractual	Aggregate
	Options	Exercise		Life	Intrinsic
Stock Options	Outstanding	Price		(in years)	Value
Balance as of January 1, 2023	1,206	$	5.09	5.08	$	630
Granted	—		—
Exercised	(3)		2.30
Canceled and expired	—		—
Balance as of March 31, 2023	1,203	$	5.10	4.83	$	456
Options vested as of March 31, 2023 and unvested options expected to vest, net of forfeitures	1,203	$	5.10	4.83	$	455
Options exercisable as of March 31, 2023	1,114	$	5.26	4.69	$	373

Summary of restricted stock awards activity

A summary of activity related to restricted stock awards for the three months ended March 31, 2023 is presented below (in thousands, except per share data):

		Weighted-Average
		Grant Date
Stock Awards	Shares	Share Value
Non-vested as of January 1, 2023	984	$	5.55
Granted	20	$	4.41
Vested	(9)	$	12.26
Forfeited	(3)	$	5.40
Non-vested as of March 31, 2023	992	$	5.46

Summary of unvested at-risk performance shares

A summary of the status of our unvested at-risk, performance shares as of March 31, 2023 is presented below (in thousands, except per share data):

		Weighted-Average
		Grant Date
Stock Awards	Shares	Share Value
Non-vested as of January 1, 2023	76	$	15.37
Granted	13	$	3.71
Vested	—	$
Forfeited	—	$
Non-vested as of March 31, 2023	89	$	13.71

*The number of shares presented is based on achieving 150% of the targeted financial performance metric as defined in the at-risk, performance shares agreement.

** The first annual vesting was reported in Q4 2021, when 25% of the at-risk performance shares became eligible subject to review and confirmation by the Compensation Committee after year-end results were certified.