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		289		289
Net loss			(5,364)	(5,364)
Ending Balance at Jun. 30, 2020	$ 4	77,710	(61,703)	16,011
Ending Balance (in shares) at Jun. 30, 2020	3,692
Beginning Balance at Mar. 31, 2020	$ 4	77,591	(59,663)	17,932
Beginning Balance (in shares) at Mar. 31, 2020	3,692
Stock-based compensation		119		119
Net loss			(2,040)	(2,040)
Ending Balance at Jun. 30, 2020	$ 4	77,710	(61,703)	16,011
Ending Balance (in shares) at Jun. 30, 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		4,157		4,157
Exercise of warrants, net of fees (in shares)	429
Stock-based compensation		329		329
Net loss			(4,255)	(4,255)
Ending Balance at Jun. 30, 2021	$ 7	101,223	(71,476)	29,754
Ending Balance (in shares) at Jun. 30, 2021	6,960
Beginning Balance at Mar. 31, 2021	$ 7	101,034	(69,668)	31,373
Beginning Balance (in shares) at Mar. 31, 2021	6,960
Stock-based compensation		189		189
Net loss			(1,808)	(1,808)
Ending Balance at Jun. 30, 2021	$ 7	$ 101,223	$ (71,476)	$ 29,754
Ending Balance (in shares) at Jun. 30, 2021	6,960