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, 2020	$ 18,541	$ 18	$ 528,362	$ (510,680)	$ 841
Balance, shares at Dec. 31, 2020		18,139,981
Net loss	(22,290)			(22,290)
Issuance of stock, net of issue costs	108,403	$ 11	108,392
Issuance of stock, net of issue costs, shares		10,513,538
Employee stock purchase plan	173		173
Employee stock purchase plan, shares		27,713
Exercise of stock options	10		10
Exercise of stock options, shares		827
Vesting of stock units	(140)		(140)
Vesting of stock units, shares		72,133
Stock-based compensation	2,168		2,168
Balance at Jun. 30, 2021	106,865	$ 29	638,965	(532,970)	841
Balance, shares at Jun. 30, 2021		28,754,192
Balance at Mar. 31, 2021	115,707	$ 29	637,797	(522,960)	841
Balance, shares at Mar. 31, 2021		28,741,475
Net loss	(10,010)			(10,010)
Vesting of stock units	(12)		(12)
Vesting of stock units, shares		12,717
Stock-based compensation	1,180		1,180
Balance at Jun. 30, 2021	106,865	$ 29	638,965	(532,970)	841
Balance, shares at Jun. 30, 2021		28,754,192
Balance at Dec. 31, 2021	$ 184,380	$ 34	752,602	(569,097)	841
Balance, shares at Dec. 31, 2021	33,905,826	33,905,826
Net loss	$ (40,382)			(40,382)
Other comprehensive loss	(239)				(239)
Issuance of stock, net of issue costs	20		20
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	(271)		(271)
Vesting of stock units, shares		114,063
Stock-based compensation	7,617		7,617
Balance at Jun. 30, 2022	$ 151,366	$ 34	760,209	(609,479)	602
Balance, shares at Jun. 30, 2022	34,052,616	34,052,616
Balance at Mar. 31, 2022	$ 166,819	$ 34	756,070	(590,073)	788
Balance, shares at Mar. 31, 2022		34,047,128
Net loss	(19,406)			(19,406)
Other comprehensive loss	(186)				(186)
Issuance of stock, net of issue costs	20		20
Vesting of stock units	(21)		(21)
Vesting of stock units, shares		5,488
Stock-based compensation	4,140		4,140
Balance at Jun. 30, 2022	$ 151,366	$ 34	$ 760,209	$ (609,479)	$ 602
Balance, shares at Jun. 30, 2022	34,052,616	34,052,616