CONSOLIDATED STATEMENTS CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2019	$ 82	$ 65,102	$ (64,095)	$ 1,089
Balance (in shares) at Dec. 31, 2019	8,155,555
Net loss			(4,865)	(4,865)
Share-based compensation		1,144		1,144
Share-based compensation (in shares)	37,974
Common stock withheld for taxes		(42)		(42)
Common stock withheld for taxes (in shares)	(12,026)
Issuance of common stock and warrants to purchase common stock	$ 2	1,056		1,058
Issuance of common stock and warrants to purchase common stock (in shares)	276,027
Issuance of common stock from exercise of warrants	$ 10	2,731		2,741
Issuance of common stock from exercise of warrants (in shares)	930,877
Balance at Dec. 31, 2020	$ 94	69,991	(68,960)	1,125
Balance (in shares) at Dec. 31, 2020	9,388,407
Net loss			(7,978)	(7,978)
Share-based compensation		980		980
Issuance of common stock and warrants to purchase common stock	$ 14	2,830		2,844
Issuance of common stock and warrants to purchase common stock (in shares)	1,372,464
Balance at Dec. 31, 2021	$ 108	$ 73,801	$ (76,938)	$ (3,029)
Balance (in shares) at Dec. 31, 2021	10,760,871