CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance, Shares at Dec. 31, 2021		26,336,536
Beginning balance at Dec. 31, 2021	$ 72,063	$ 26	$ (51)	$ 384,132		$ (312,044)
Employee stock plans	242			242
Employee stock plans, Shares		82,572
Stock-based compensation	1,394			1,394
Net loss	(15,522)					(15,522)
Ending balance, Shares at Mar. 31, 2022		26,419,108
Ending balance at Mar. 31, 2022	58,177	$ 26	(51)	385,768		(327,566)
Beginning balance, Shares at Dec. 31, 2021		26,336,536
Beginning balance at Dec. 31, 2021	72,063	$ 26	(51)	384,132		(312,044)
Unrealized (loss) gain on short-term investments	(42)
Net loss	(30,659)
Ending balance, Shares at Jun. 30, 2022		26,569,220
Ending balance at Jun. 30, 2022	45,034	$ 27	(51)	387,803	$ (42)	(342,703)
Beginning balance, Shares at Mar. 31, 2022		26,419,108
Beginning balance at Mar. 31, 2022	58,177	$ 26	(51)	385,768		(327,566)
Employee stock plans	9	$ 1		8
Employee stock plans, Shares		150,112
Stock-based compensation	1,954			1,954
Revaluation of warrants	73			73
Unrealized (loss) gain on short-term investments	(42)				(42)
Net loss	(15,137)					(15,137)
Ending balance, Shares at Jun. 30, 2022		26,569,220
Ending balance at Jun. 30, 2022	45,034	$ 27	$ (51)	387,803	(42)	(342,703)
Beginning balance, Shares at Dec. 31, 2022		49,974,281
Beginning balance at Dec. 31, 2022	81,955	$ 50		451,060	(61)	(369,094)
Employee stock plans, Shares		216,105
Stock-based compensation	1,942			1,942
Exercised of pre-funded warrants	1	$ 1
Exercised of pre-funded warrants, Shares		1,062,080
Unrealized (loss) gain on short-term investments	56				56
Net loss	(15,371)					(15,371)
Ending balance, Shares at Mar. 31, 2023		51,252,466
Ending balance at Mar. 31, 2023	68,583	$ 51		453,002	(5)	(384,465)
Beginning balance, Shares at Dec. 31, 2022		49,974,281
Beginning balance at Dec. 31, 2022	81,955	$ 50		451,060	(61)	(369,094)
Unrealized (loss) gain on short-term investments	31
Net loss	(33,061)
Ending balance, Shares at Jun. 30, 2023		52,659,684
Ending balance at Jun. 30, 2023	53,044	$ 53		455,176	(30)	(402,155)
Beginning balance, Shares at Mar. 31, 2023		51,252,466
Beginning balance at Mar. 31, 2023	68,583	$ 51		453,002	(5)	(384,465)
Employee stock plans	117	$ 1		116
Employee stock plans, Shares		698,016
Stock-based compensation	2,059			2,059
Exercised of pre-funded warrants		$ 1		(1)
Exercised of pre-funded warrants, Shares		709,202
Unrealized (loss) gain on short-term investments	(25)				(25)
Net loss	(17,690)					(17,690)
Ending balance, Shares at Jun. 30, 2023		52,659,684
Ending balance at Jun. 30, 2023	$ 53,044	$ 53		$ 455,176	$ (30)	$ (402,155)