Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Beginning Balance at Dec. 31, 2020	$ 3	$ 247,417	$ (228,234)	$ 19,186
Beginning Balance, (in shares) at Dec. 31, 2020	945,276
Share-based compensation expense		315		$ 315
Issuance of common stock upon vesting of restricted stock units (in shares)	2			2
Issuance of common stock upon exercise of warrants		8,509		$ 8,509
Issuance of common stock upon exercise of warrants (in shares)	425,317
Net loss			(9,895)	(9,895)
Ending Balance at Dec. 31, 2021	$ 3	256,241	(238,129)	$ 18,115
Ending Balance, (in shares) at Dec. 31, 2021	1,370,595			1,370,595
Share-based compensation expense		159		$ 159
Forfeiture of restricted stock	(54)			(54)
Fractional shares issued due to 1 for 25 reverse stock split (in shares)	20,619
Issuance of common stock and warrants in public offerings		7,962		$ 7,962
Issuance of common stock and warrants in public offerings (in shares)	154,000
Issuance of common stock upon exercise of warrants (in shares)	884,286
Net loss			(10,490)	(10,490)
Ending Balance at Dec. 31, 2022	$ 3	$ 264,362	$ (248,619)	$ 15,746
Ending Balance, (in shares) at Dec. 31, 2022	2,429,446			2,429,446