CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) shares in Thousands, $ in Thousands	Common stock	Additional Paid in Capital 2024 Warrants	Additional Paid in Capital Warrants 2024, Pre Funded Warrants	Additional Paid in Capital	Accumulated Deficit	2024 Warrants	Warrants 2024, Pre Funded Warrants	Total
Beginning Balance at Dec. 31, 2022	$ 28			$ 488,292	$ (411,545)			$ 76,775
Beginning Balance (in shares) at Dec. 31, 2022	28,147
Stock-based compensation				4,877				4,877
Exercise of stock options				258				258
Exercise of stock options (in shares)	173
Issuance of common stock, net of offering costs	$ 1			23,917				23,918
Issuance of common stock, net of offering costs (in shares)	756
Vesting of restricted stock units, net of employee tax obligations				(27)				(27)
Vesting of restricted stock units, net of employee tax obligations (in shares)	24
Net Income (Loss)					(52,796)			(52,796)
Ending Balance at Mar. 31, 2023	$ 29			517,317	(464,341)			53,005
Ending Balance (in shares) at Mar. 31, 2023	29,100
Beginning Balance at Dec. 31, 2022	$ 28			488,292	(411,545)			76,775
Beginning Balance (in shares) at Dec. 31, 2022	28,147
Ending Balance at Dec. 31, 2023	$ 30			534,060	(590,598)			$ (56,508)
Ending Balance (in shares) at Dec. 31, 2023	29,930							29,930
Issuance of stock purchase warrants		$ 224	$ 3,570			$ 224	$ 3,570	$ 224
Stock-based compensation				3,433				3,433
Issuance of common stock, net of offering costs	$ 4			3,705				3,709
Issuance of common stock, net of offering costs (in shares)	3,702
Net Income (Loss)					(26,791)			(26,791)
Ending Balance at Mar. 31, 2024	$ 34			$ 544,992	$ (617,389)			$ (72,363)
Ending Balance (in shares) at Mar. 31, 2024	33,632							33,632