CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 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		4,516,000			65,000
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	(1,285)									(1,285)
Stock-based compensation	50								50
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)			(75)	(475)	(185,000)
Issuance of stock on vested restricted stock units (in shares)					31,000
Preferred stock dividends	(3)								(3)
Purchase of treasury stock (in shares)								18,000
Purchase of treasury stock	(53)							$ (53)
Ending Balance (in shares) at Mar. 31, 2018		32	375	1,275	4,732,000			83,000
Ending Balance, value at Mar. 31, 2018	12,498	$ 0			$ 5			$ (405)	184,688	(171,790)
Beginning Balance (in shares) at Dec. 31, 2018		32	75	525	5,114,000			133,000
Beginning Balance, value at Dec. 31, 2018	6,830	$ 0			$ 5			$ (496)	184,994	(177,673)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(598)									(598)
Stock-based compensation	29								29
Preferred stock conversion (in shares)			(75)	(50)	(43,000)	(26,786)	(16,667)
Issuance of stock on vested restricted stock units (in shares)					17,000
Preferred stock dividends	(15)								(15)
Purchase of treasury stock	(1)							$ (1)
Ending Balance (in shares) at Mar. 31, 2019		32	0	475	5,174,000			133,000
Ending Balance, value at Mar. 31, 2019	$ 6,245	$ 0			$ 5			$ (497)	$ 185,008	$ (178,271)