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, 2019	$ 4	$ 77,421	$ (56,339)	$ 21,086
Beginning Balance (in shares) at Dec. 31, 2019	3,692
Stock-based compensation		170		170
Net loss			(3,324)	(3,324)
Ending Balance at Mar. 31, 2020	$ 4	77,591	(59,663)	17,932
Ending Balance (in shares) at Mar. 31, 2020	3,692
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	$ 429	4,157		4,157
Stock-based compensation	0	140	0	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