Stock-Based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2022

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, 2022 and 2021 consisted of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2022		2021		2022		2021
Cost of sales
Nonqualified stock options	$	150	$	383	$	1,247	$	1,019
Research and development
Nonqualified stock options		476		355		1,412		910
Selling, general and administrative
Nonqualified stock options		2,166		2,071		5,297		4,512
Performance-based restricted stock units		647		1,193		2,719		2,896
Restricted stock units		454		409		1,382		1,149
Cash-settled performance-based share-based awards ("Liability Awards")		705		446		1,634		1,103
Total selling, general and administrative		3,972		4,119		11,032		9,660
Stock-based compensation expense before taxes	$	4,598	$	4,857	$	13,691	$	11,589

Stock Options

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,
	2022	2021
Risk-free interest rate	1.4% - 3.4%	0.5% - 0.7%
Expected option term	4.0 years	4.0 years
Expected dividend yield	—	—
Expected price volatility	46.2% - 47.4%	46.3% - 46.7%

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,
	2022	2021
Risk-free interest rate	1.6% - 2.7%	0.1% - 0.3%
Performance period	2.6 - 2.8 years	1.8 - 2.8 years
Expected dividend yield	—	—
Expected price volatility	38.5% - 46.2%	43.7% - 49.3%