CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Total	Preferred Stock Series A-2 Preferred Stock	Preferred Stock Series B Preferred Stock	Preferred Stock Series C Preferred Stock	Common Stock	Common Stock Series B Preferred Stock	Common Stock Series C Preferred Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2017		32	450		45,161,000			651,000
Beginning Balance, value at Dec. 31, 2017	$ 12,262	$ 0			$ 5			$ (352)	$ 183,114	$ (170,505)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(4,444)									(4,444)
Stock-based compensation	270								270
Issuance of preferred stock, net of expenses (in shares)				1,750
Issuance of preferred stock, net of expenses	1,527								1,527
Preferred stock conversion (in shares)		0	(75)	(975)	(3,518,000)	(268,000)	(3,250,000)
Preferred stock conversion	0	$ 0							0
Issuance of stock on vested restricted stock units (in shares)					553,000
Issuance of stock on vested restricted stock units	0								0
Preferred stock dividends	(9)								(9)
Purchase of treasury stock (in shares)								673,000
Purchase of treasury stock	(143)							$ (143)	0
Ending Balance (in shares) at Sep. 30, 2018		32	375	775	49,232,000			1,324,000
Ending Balance, value at Sep. 30, 2018	$ 9,463	$ 0			$ 5			$ (495)	$ 184,902	$ (174,949)