CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Public offering	At-The-Market Offering	PREFERRED STOCK	COMMON STOCK	COMMON STOCK Public offering	COMMON STOCK At-The-Market Offering	ADDITIONAL PAID-IN CAPITAL	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, 2020				0
Beginning balance (in shares) at Dec. 31, 2020					8,506,651
Beginning balance at Dec. 31, 2020	$ 34,170				$ 1			$ 371,518			$ (337,406)	$ 57
Increase (Decrease) in Shareholders' Equity
Net Loss	(32,674)										(32,674)
Unrealized Loss on Available-for-Sale Investments	(6)											(6)
Foreign Currency Translation Adjustments	1											1
Vesting of Restricted Stock Units Issued, net of taxes withheld (in shares)					23,483
Vesting of Restricted Stock Units Issued, net of taxes withheld	(6)							(6)
Warrant Modification Expense	107							107
Stock-based Compensation	$ 943							943
Ending balance (in shares) at Dec. 31, 2021	0			0
Ending balance (in shares) at Dec. 31, 2021	8,544,225				8,544,225
Ending balance at Dec. 31, 2021	$ 2,535				$ 1			372,562			(370,080)	52
Increase (Decrease) in Shareholders' Equity
Net Loss	(18,679)										(18,679)
Unrealized Loss on Available-for-Sale Investments	114											114
Foreign Currency Translation Adjustments	(3)											(3)
Vesting of Restricted Stock Units Issued, net of taxes withheld (in shares)					10,958
Vesting of Restricted Stock Units Issued, net of taxes withheld	$ 0
Warrant Modification Expense (in shares)	14,091
Issuance of stock, net of offering costs (in shares)				15,000		844,613	7,500
Issuance of stock, net of offering costs	$ 14,916	$ 14,893	$ 15					14,916	$ 14,893	$ 15
Issuance of common stock upon exercise of prefunded warrants (in shares)					2,756,377
Stock-based Compensation	$ 315							315
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				$ 1			$ 402,701			$ (388,759)	$ 163