Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-based Compensation

Schedule of share-based compensation expense

	Three months ended June 30,				Six months ended June 30,
	2023		2022		2023		2022
	(in thousands)
Cost of sales	$	1,572	$	1,251	$	3,023	$	2,189
Research and development		2,568		1,863		4,657		3,120
Selling, general, and administrative		3,792		3,164		7,279		5,450
Total	$	7,932	$	6,278	$	14,959	$	10,759

Summary of stock option activity

		Weighted
	Number of	Average
	Shares	Exercise Price
	(in thousands)
Balance - December 31, 2022	177	$	30.94
Expired	(62)		30.47
Balance - June 30, 2023	115		31.18

Summary of non-vested restricted and performance shares activity

		Weighted
		Average
	Number of	Grant Date
	Shares	Fair Value
	(in thousands)
Balance - December 31, 2022	2,496	$	23.83
Granted	1,076		22.79
Performance award adjustments	183		10.59
Vested	(1,113)		16.47
Forfeited	(50)		28.01
Balance - June 30, 2023	2,592		25.66