CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 6 months ended Jun. 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	(2,974)									(2,974)
Stock-based compensation	159								159
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)	(475)	1,851,000	268,000	1,583,000
Preferred stock conversion	0	$ 0							0
Issuance of stock on vested restricted stock units (in shares)					306,000
Issuance of stock on vested restricted stock units	0								0
Preferred stock dividends	(6)								(6)
Purchase of treasury stock (in shares)								182,000
Purchase of treasury stock	(52)							$ (52)
Ending Balance (in shares) at Jun. 30, 2018		32	375	1,275	47,318,000			833,000
Ending Balance, value at Jun. 30, 2018	$ 10,916	$ 0			$ 5			$ (404)	$ 184,794	$ (173,479)