CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]
Balance at Dec. 31, 2021	$ 184,380	$ 34	$ 752,602	$ (569,097)	$ 841
Balance, shares at Dec. 31, 2021		33,905,826
Net loss	(20,976)			(20,976)
Other comprehensive gain (loss)	(53)				(53)
Employee stock purchase plan	201		201
Employee stock purchase plan, shares		28,504
Exercise of stock options	40		40
Exercise of stock options, shares		4,223
Vesting of stock units	(250)		(250)
Vesting of stock units, shares		108,575
Stock-based compensation	3,477		3,477
Balance at Mar. 31, 2022	166,819	$ 34	756,070	(590,073)	788
Balance, shares at Mar. 31, 2022		34,047,128
Balance at Dec. 31, 2022	$ 96,368	$ 34	766,899	(671,351)	786
Balance, shares at Dec. 31, 2022	34,082,934	34,082,934
Net loss	$ (21,164)			(21,164)
Other comprehensive gain (loss)	57				57
Employee stock purchase plan	248		248
Employee stock purchase plan, shares		63,721
Vesting of stock units	(169)		(169)
Vesting of stock units, shares		155,271
Stock-based compensation	3,050		3,050
Balance at Mar. 31, 2023	$ 78,390	$ 34	$ 770,028	$ (692,515)	$ 843
Balance, shares at Mar. 31, 2023	34,301,926	34,301,926