CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Shares Private Placement	Common Shares Public Offering	Common Shares ATM	Common Shares	Preferred Shares Series A Private Placement	Preferred Shares Series B Private Placement	Preferred Shares	Additional Paid-In Capital Private Placement	Additional Paid-In Capital Public Offering	Additional Paid-In Capital ATM	Additional Paid-In Capital	Accumulated Deficit	Private Placement	Public Offering	ATM	Total
Balance at Dec. 31, 2017				$ 126							$ 288,041	$ (180,382)				$ 107,785
Balance (in shares) at Dec. 31, 2017				125,802,023
Issuance of Units of Common Stock:
Issued pursuant to stock awards				$ 1							(173)					(172)
Issued pursuant to stock awards (in shares)				993,481
Stock-based compensation											871					871
Stock issued during period		$ (9)	$ 1						$ (2,042)	$ 485				$ (2,051)	$ 486
Stock issued during period (in shares)		9,151,000	1,168,300
Net loss												(10,744)				(10,744)
Balance at Dec. 31, 2018				$ 137							291,266	(191,126)				100,277
Balance (in shares) at Dec. 31, 2018				137,114,804
Issuance of Units of Common Stock:
Issued pursuant to stock awards											3					3
Issued pursuant to stock awards (in shares)				135,000
Stock-based compensation											88					88
Restricted stock net share settlement											(161)					(161)
Restricted stock net share settlement (in shares)				1,409,296
Warrant Exercise				$ 2							253					255
Warrant Exercise (in shares)				694,200
Issuance of New Warrants											289					289
Conversion of shares				$ 2							498					500
Conversion of shares (in shares)				1,851,844			(500)
Stock issued during period	$ 11							$ 2,769					$ 2,780
Stock issued during period (in shares)	11,111,111				1,400	400
Net loss												(7,878)				(7,878)
Balance at Dec. 31, 2019				$ 152							$ 295,005	$ (199,004)				$ 96,153
Balance (in shares) at Dec. 31, 2019				152,316,255												152,033,515
Balance (in shares) at Dec. 31, 2019							1,300