CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Additional Paid in Capital Shares to be Issued	Accumulated Deficit
Beginning Balance at Dec. 31, 2015	$ 9,818	$ 9	$ 35,193	$ 0	$ (25,384)
Beginning Balance (in shares) at Dec. 31, 2015		8,976
Issuance of common stock, net of fees	4,388	$ 1	4,387
Issuance of common stock, net of fees (in shares)		588
Stock-based compensation	784		784
Net loss	(6,750)				(6,750)
Ending Balance at Dec. 31, 2016	8,240	$ 10	40,364	0	(32,134)
Ending Balance (in shares) at Dec. 31, 2016		9,564
Issuance of common stock, net of fees	3,567	$ 1	3,566
Issuance of common stock, net of fees (in shares)		1,333
Exercise of warrants	1,518	$ 0	1,518
Exercise of warrants (in shares)		442
Warrants transferred to equity upon modification	797		797
Conversion of warrant liability to equity	175		175
Stock-based compensation	793		793
Deemed dividend related to warrant modification	(1,038)		(1,038)
Modification of warrant exercise price	1,038		1,038
Net loss	(7,023)				(7,023)
Ending Balance at Dec. 31, 2017	$ 8,067	$ 11	$ 47,213	$ 0	$ (39,157)
Ending Balance (in shares) at Dec. 31, 2017		11,339