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, 2018	$ 1	$ 48,957	$ (47,740)	$ 1,218
Beginning Balance (in shares) at Dec. 31, 2018	680
Issuance of common stock, net of fees	$ 3	26,697		26,700
Issuance of common stock, net of fees (in shares)	2,602
Exercise of warrants, net of fees	$ 0	1,083	0	1,083
Exercise of warrants, net of fees (in shares)	410
Stock-based compensation	$ 0	684	0	684
Net loss			(8,599)	(8,599)
Ending Balance at Dec. 31, 2019	$ 4	77,421	(56,339)	21,086
Ending 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