Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of non-cash stock-based compensation expense

Non-cash stock-based compensation expense (service-based stock options, restricted stock units and employee stock purchase plan) is summarized in the following table:

	Three Months Ended March 31,
(in thousands)	2023		2022
Cost of product sales	$	885	$	1,118
Research and development	977		1,350
Selling, general and administrative	6,869		7,063
Total non-cash stock-based compensation expense	$	8,731	$	9,531