CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($)	Total	Prior Warrants And Pre-funded Warrants	Public offering	At-The-Market Offering	PREFERRED STOCK	COMMON STOCK	COMMON STOCK Prior Warrants And Pre-funded Warrants	COMMON STOCK Pre-funded Warrants	COMMON STOCK Public offering	COMMON STOCK At-The-Market Offering	ADDITIONAL PAID-IN CAPITAL	ADDITIONAL PAID-IN CAPITAL Prior Warrants And Pre-funded Warrants	ADDITIONAL PAID-IN CAPITAL Public offering	ADDITIONAL PAID-IN CAPITAL At-The-Market Offering	ACCUMULATED DEFICIT	ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS)
Beginning balance (in shares) at Dec. 31, 2021					0
Beginning balance (in shares) at Dec. 31, 2021						8,544,225
Beginning balance at Dec. 31, 2021	$ 2,535,000					$ 1,000					$ 372,562,000				$ (370,080,000)	$ 52,000
Increase (Decrease) in Shareholders' Equity
Net Loss	(18,679,000)														(18,679,000)
Unrealized Loss on Available-for-Sale Investments	114,000															114,000
Foreign Currency Translation Adjustments	(3,000)															(3,000)
Vesting of Restricted Stock Units Issued, net of taxes withheld (in shares)						10,958
Issuance of stock, net of offering costs (in shares)					15,000				844,613	7,500
Issuance of stock, net of offering costs	14,916,000		$ 14,893,000	$ 15,000							14,916,000		$ 14,893,000	$ 15,000
Issuance of common stock upon exercise of warrants (in shares)								2,756,377
Stock-based Compensation	$ 315,000										315,000
Ending balance (in shares) at Dec. 31, 2022	15,000				15,000
Ending balance (in shares) at Dec. 31, 2022	12,163,673					12,163,673
Ending balance at Dec. 31, 2022	$ 14,106,000					$ 1,000					402,701,000				(388,759,000)	163,000
Increase (Decrease) in Shareholders' Equity
Net Loss	(8,439,000)														(8,439,000)
Unrealized Loss on Available-for-Sale Investments	(159,000)															(159,000)
Foreign Currency Translation Adjustments	(5,000)															(5,000)
Vesting of Restricted Stock Units Issued, net of taxes withheld (in shares)						125,000
Issuance of stock, net of offering costs				$ 1,136,000						$ 640,944				$ 1,136,000
Issuance of common stock upon exercise of warrants (in shares)							16,200,990
Issuance of common stock upon exercise of warrants		$ 13,720,000					$ 2,000					$ 13,718,000
Stock-based Compensation	$ 932,000										932,000
Ending balance (in shares) at Dec. 31, 2023	15,000				15,000
Ending balance (in shares) at Dec. 31, 2023	29,130,607					29,130,607
Ending balance at Dec. 31, 2023	$ 21,291,000					$ 3,000					$ 418,487,000				$ (397,198,000)	$ (1,000)