CONDENSED 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, 2020	$ 5	$ 82,286	$ (67,221)	$ 15,070
Beginning Balance (in shares) at Dec. 31, 2020	4,542
Issuance of common stock, net of fees	$ 2	14,451		14,453
Issuance of common stock, net of fees (in shares)	1,989
Exercise of warrants, net of fees		4,157		4,157
Exercise of warrants, net of fees (in shares)	429
Stock-based compensation		140		140
Net loss			(2,447)	(2,447)
Ending Balance at Mar. 31, 2021	$ 7	101,034	(69,668)	31,373
Ending Balance (in shares) at Mar. 31, 2021	6,960
Beginning Balance at Dec. 31, 2021	$ 7	103,111	(77,661)	25,457
Beginning Balance (in shares) at Dec. 31, 2021	7,160
Stock-based compensation		217		217
Net loss			(3,359)	(3,359)
Ending Balance at Mar. 31, 2022	$ 7	$ 103,328	$ (81,020)	$ 22,315
Ending Balance (in shares) at Mar. 31, 2022	7,160