Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2022

Stockholders' Equity

Schedule of allocation of stock-based compensation expense

Stock-based compensation expense was allocated as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Cost of goods sold	$	31	$	75	$	75	$	135
Research and development		91		121		194		228
Selling and marketing		40		43		80		78
General and administrative		507		604		1,084		1,144
Total	$	669	$	843	$	1,433	$	1,585