Condensed Consolidated Statements of Stockholders' Equity / (Deficit) - USD ($) $ in Thousands	Total	Preferred Stock Member	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock
Balance at Dec. 31, 2022	$ 36,239	$ 3	$ 14	$ 412,136	$ (375,914)	$ 0
Balance (in shares) at Dec. 31, 2022		29,057,000	141,349,000			0
Shares issued under Standby Equity Purchase Agreements	1,869			1,869
Shares issued under Standby Equity Purchase Agreements (in shares)			462,000
Retainer shares issued	1		$ 1
Retainer shares issued (in shares)			4,000,000
Stock-based compensation	3,720			3,720
Net income (loss)	(30,753)				(30,753)
Balance at Mar. 31, 2023	11,076	$ 3	$ 15	417,725	(406,667)	$ 0
Balance (in shares) at Mar. 31, 2023		29,057,000	145,811,000			0
Balance at Dec. 31, 2023	(172,938)		$ 16	407,813	(490,245)	$ (90,522)
Balance (in shares) at Dec. 31, 2023		29,057,000	160,084,000			60,069,000
Shares issued under Standby Equity Purchase Agreements and under ATM Sales Agreement, Share			189,000
Shares issued under Bought Deal Offering			5,882,000
Shares issued under Bought Deal Offering	3,769		$ 1	3,768	0
Shares issued under Standby Equity Purchase Agreements and under ATM Sales Agreement, Value	156			156
Stock options exercised	$ 46			46
Stock options exercised (in shares)	34		35,000
Stock-based compensation	$ 3,558			3,558
Net income (loss)	(24,377)				(24,377)
Balance at Mar. 31, 2024	$ (189,786)		$ 17	$ 415,341	$ (514,622)	$ (90,522)
Balance (in shares) at Mar. 31, 2024		29,057,000	166,190,000			60,069,000