Stock Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of stock-based compensation

Stock-based compensation related to the Company’s stock-based awards was recorded as an expense and allocated as follows (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2022		2021		2022		2021
Cost of sales	$	119	$	85	$	238	$	190
Research and development	1,264		1,508		5,137		4,168
Selling, general and administrative	3,798		4,369		11,764		11,727
Total stock-based compensation	$	5,181	$	5,962	$	17,139	$	16,085