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	$ 2	19,409		19,411
Issuance of common stock, net of fees (in shares)	1,794
Exercise of warrants, net of fees		869		869
Exercise of warrants, net of fees (in shares)	340
Stock-based compensation		157		157
Net loss			(1,512)	(1,512)
Ending Balance at Mar. 31, 2019	$ 3	69,392	(49,252)	20,143
Ending Balance (in shares) at Mar. 31, 2019	2,814
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