Condensed Consolidated Statements of Stockholders' Equity / (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock Member	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	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	141,349				0
Shares issued under Standby Equity Purchase Agreements	1,869			1,869
Shares issued under Standby Equity Purchase Agreements (in shares)			462
Retainer shares issued	1		$ 1
Retainer shares issued (in shares)			4,000
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	145,811				0
Balance at Dec. 31, 2022	36,239	$ 3	$ 14	412,136		(375,914)	$ 0
Balance (in shares) at Dec. 31, 2022		29,057	141,349				0
Other comprehensive income	0
Balance at Jun. 30, 2023	10,417	$ 3	$ 15	443,715		(433,316)	$ 0
Balance (in shares) at Jun. 30, 2023		29,057	148,700				0
Balance at Mar. 31, 2023	11,076	$ 3	$ 15	417,725		(406,667)	$ 0
Balance (in shares) at Mar. 31, 2023		29,057	145,811				0
Shares issued under Standby Equity Purchase Agreements	13,925			13,925
Shares issued under Standby Equity Purchase Agreements (in shares)			2,084
Stock options exercised	222			222
Stock options exercised (in shares)			128
Conversion of Convertible Debentures into common stock, shares			632
Conversion of Convertible Debentures into common stock	7,735			7,735
Issuance of common stock upon warrants exercise, shares			45
Issuance of common stock upon warrants exercise	521			521
Stock-based compensation	3,587			3,587
Other comprehensive income	0
Net income (loss)	(26,649)					(26,649)
Balance at Jun. 30, 2023	10,417	$ 3	$ 15	443,715		(433,316)	$ 0
Balance (in shares) at Jun. 30, 2023		29,057	148,700				0
Balance at Dec. 31, 2023	(172,938)		$ 16	407,813		(490,245)	$ (90,522)
Balance (in shares) at Dec. 31, 2023		29,057	160,084				60,069
Shares issued under Standby Equity Purchase Agreements and under ATM Sales Agreement, Share			189
Shares issued under Bought Deal Offering			5,882
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)			35
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	166,190				60,069
Balance at Dec. 31, 2023	$ (172,938)		$ 16	407,813		(490,245)	$ (90,522)
Balance (in shares) at Dec. 31, 2023		29,057	160,084				60,069
Stock options exercised (in shares)	101
Other comprehensive income	$ 1,851
Balance at Jun. 30, 2024	(214,692)		$ 18	426,165	$ 1,851	(552,204)	$ (90,522)
Balance (in shares) at Jun. 30, 2024		29,057	181,474				60,069
Balance at Mar. 31, 2024	(189,786)		$ 17	415,341		(514,622)	$ (90,522)
Balance (in shares) at Mar. 31, 2024		29,057	166,190				60,069
Shares issued under Registered Direct Offering, shares			15,000
Shares issued under Registered Direct Offering	5,919		$ 1	5,918
Placement Agent Warrants issued in connection with Registered Direct Offering and Representative Warrants issued in connection with Bought Deal Offering	956			956
Shares issued under ESPP, shares			167
Shares issued under ESPP	154			154
Stock options exercised	99			99
Stock options exercised (in shares)			67
Issuance of common stock upon warrants exercise, shares			50
Issuance of common stock upon warrants exercise	84			84
Stock-based compensation	3,613			3,613
Other comprehensive income	1,851				1,851
Net income (loss)	(37,582)					(37,582)
Balance at Jun. 30, 2024	$ (214,692)		$ 18	$ 426,165	$ 1,851	$ (552,204)	$ (90,522)
Balance (in shares) at Jun. 30, 2024		29,057	181,474				60,069