Stock-Based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2023

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Stock-based compensation expense before income tax expense for the three and nine-month periods ended September 30, 2023 and 2022 consisted of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Cost of sales
Nonqualified stock options	$	367	$	150	$	1,240	$	1,247
Research and development
Nonqualified stock options		488		476		1,329		1,412
Selling, general and administrative
Nonqualified stock options		2,083		2,166		5,304		5,297
Performance-based restricted stock units		1,838		647		4,470		2,719
Restricted stock units		430		454		1,341		1,382
Cash-settled performance-based share-based awards ("Liability Awards")		591		705		1,662		1,634
Total selling, general and administrative		4,942		3,972		12,777		11,032
Stock-based compensation expense before taxes	$	5,797	$	4,598	$	15,346	$	13,691

Employee Stock Option [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

	Nine Months Ended
	September 30,
	2023	2022
Risk-free interest rate	3.6% - 4.6%	1.4% - 3.4%
Expected option term	4.0 years	4.0 years
Expected dividend yield	—	—
Expected price volatility	44.6% - 47.1%	46.2% - 47.4%

Stock-Settled Performance-Based Restricted Stock Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

	Nine Months Ended
	September 30,
	2023	2022
Risk-free interest rate	3.9% - 4.6%	1.6% - 2.7%
Performance period	2.8 years	2.6 - 2.8 years
Expected dividend yield	—	—
Expected price volatility	31.4% - 32.6%	38.5% - 46.2%