CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid in Capital.	Accumulated Deficit	Total
Beginning Balance at Dec. 31, 2019	$ 4	$ 77,421	$ (56,339)	$ 21,086
Beginning Balance (in shares) at Dec. 31, 2019	3,692
Issuance of common stock, net of fees	$ 1	4,288		4,289
Issuance of common stock, net of fees (in shares)	850
Stock-based compensation		577		577
Net loss			(10,882)	(10,882)
Ending Balance at Dec. 31, 2020	$ 5	82,286	(67,221)	15,070
Ending Balance (in shares) at Dec. 31, 2020	4,542
Issuance of common stock, net of fees	$ 2	15,847		15,849
Issuance of common stock, net of fees (in shares)	2,189
Exercise of warrants, net of fees		4,157		4,157
Exercise of warrants, net of fees (in shares)	429
Stock-based compensation		821		821
Net loss			(10,440)	(10,440)
Ending Balance at Dec. 31, 2021	$ 7	$ 103,111	$ (77,661)	$ 25,457
Ending Balance (in shares) at Dec. 31, 2021	7,160