CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Series A-2 Preferred Stock	Series D Preferred Stock	Preferred Stock Series A-2 Preferred Stock	Preferred Stock Series B Preferred Stock	Preferred Stock Series C Preferred Stock	Preferred Stock Series D Preferred Stock	Preferred Stock Series E Preferred Stock	Common Stock	Common Stock Series C Preferred Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2018				32	75	525			5,113,726		132,519
Beginning Balance, value at Dec. 31, 2018	$ 6,830			$ 0	$ 0	$ 0			$ 1		$ (496)	$ 184,998	$ (177,673)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(598)												(598)
Stock-based compensation	29											29
Issuance of stock on vested restricted stock units (in shares)									16,824
Preferred stock conversion (in shares)					75	50			43,402
Preferred stock dividends	(15)											(15)
Purchase of treasury stock (in shares)											900
Purchase of treasury stock	(1)										$ (1)
Ending Balance (in shares) at Mar. 31, 2019				32	0	475			5,173,952		133,419
Ending Balance, value at Mar. 31, 2019	6,245			$ 0	$ 0	$ 0			$ 1		$ (497)	185,012	(178,271)
Beginning Balance (in shares) at Dec. 31, 2018				32	75	525			5,113,726		132,519
Beginning Balance, value at Dec. 31, 2018	6,830			$ 0	$ 0	$ 0			$ 1		$ (496)	184,998	(177,673)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,113)
Ending Balance (in shares) at Sep. 30, 2019				32	0	475			5,238,952		98,419
Ending Balance, value at Sep. 30, 2019	4,710			$ 0	$ 0	$ 0			$ 1		$ (165)	184,660	(179,786)
Beginning Balance (in shares) at Dec. 31, 2018				32	75	525			5,113,726		132,519
Beginning Balance, value at Dec. 31, 2018	$ 6,830			$ 0	$ 0	$ 0			$ 1		$ (496)	184,998	(177,673)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock conversion (in shares)						50				16,667
Forfeited restricted stock (in shares)	(10,063)
Ending Balance (in shares) at Dec. 31, 2019				32		475	1,734,901	131,579	5,266,828		105,285
Ending Balance, value at Dec. 31, 2019	$ 21,785			$ 0		$ 0	$ 0	$ 0	$ 1		$ (165)	207,383	(185,434)
Beginning Balance (in shares) at Mar. 31, 2019				32	0	475			5,173,952		133,419
Beginning Balance, value at Mar. 31, 2019	6,245			$ 0	$ 0	$ 0			$ 1		$ (497)	185,012	(178,271)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(875)												(875)
Stock-based compensation	24											24
Issuance of stock on vested restricted stock units (in shares)											(75,000)
Issuance of stock on vested restricted stock units											$ 382	(382)
Preferred stock dividends	(4)											(4)
Purchase of treasury stock (in shares)											24,000
Purchase of treasury stock	(34)										$ (34)
Ending Balance (in shares) at Jun. 30, 2019				32	0	475			5,173,952		82,419
Ending Balance, value at Jun. 30, 2019	5,356			$ 0	$ 0	$ 0			$ 1		$ (149)	184,650	(179,146)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(640)												(640)
Stock-based compensation	14											14
Issuance of stock on vested restricted stock units (in shares)									65,000
Preferred stock dividends	(4)											(4)
Purchase of treasury stock (in shares)											16,000
Purchase of treasury stock	(16)										$ (16)
Ending Balance (in shares) at Sep. 30, 2019				32	0	475			5,238,952		98,419
Ending Balance, value at Sep. 30, 2019	4,710			$ 0	$ 0	$ 0			$ 1		$ (165)	184,660	(179,786)
Beginning Balance (in shares) at Dec. 31, 2019				32		475	1,734,901	131,579	5,266,828		105,285
Beginning Balance, value at Dec. 31, 2019	21,785			$ 0		$ 0	$ 0	$ 0	$ 1		$ (165)	207,383	(185,434)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,129)												(3,129)
Stock-based compensation	32											32
Preferred stock conversion (in shares)						150			50,000
Forfeited restricted stock (in shares)							(14,441)
Preferred stock dividends	(4)											(4)
Issuance of preferred stock for accrued dividends (in shares)				13
Issuance of preferred stock for accrued dividends	98											98
Purchase of treasury stock	(7)										$ (7)
Ending Balance (in shares) at Mar. 31, 2020				45		325	1,720,460	131,579	5,316,828		105,285
Ending Balance, value at Mar. 31, 2020	18,775			$ 0		$ 0	$ 0	$ 0	$ 1		$ (172)	207,509	(188,563)
Beginning Balance (in shares) at Dec. 31, 2019				32		475	1,734,901	131,579	5,266,828		105,285
Beginning Balance, value at Dec. 31, 2019	21,785			$ 0		$ 0	$ 0	$ 0	$ 1		$ (165)	207,383	(185,434)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,598)
Preferred stock conversion (in shares)		13	1,686,659			225				75,000
Ending Balance (in shares) at Sep. 30, 2020				45		250	1,702,010	131,579	5,355,841		113,283
Ending Balance, value at Sep. 30, 2020	13,345			$ 0		$ 0	$ 0	$ 0	$ 1		$ (181)	207,558	(194,033)
Beginning Balance (in shares) at Mar. 31, 2020				45		325	1,720,460	131,579	5,316,828		105,285
Beginning Balance, value at Mar. 31, 2020	18,775			$ 0		$ 0	$ 0	$ 0	$ 1		$ (172)	207,509	(188,563)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,385)												(3,385)
Stock-based compensation	29											29
Issuance of stock on vested restricted stock units (in shares)									23,334
Forfeited restricted stock (in shares)							(17,364)
Preferred stock dividends	(4)											(4)
Issuance of preferred stock for accrued dividends	1											1
Purchase of treasury stock (in shares)											7,998
Purchase of treasury stock	(9)										$ (9)
Ending Balance (in shares) at Jun. 30, 2020				0		325	1,703,096	131,579	5,340,162		113,283
Ending Balance, value at Jun. 30, 2020	15,407			$ 0		$ 0	$ 0	$ 0	$ 1		$ (181)	207,535	(191,948)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,085)												(2,085)
Stock-based compensation	27											27
Preferred stock conversion (in shares)						75			25,000
Forfeited restricted stock (in shares)							(1,086)		(9,321)
Preferred stock dividends	(4)											(4)
Ending Balance (in shares) at Sep. 30, 2020				45		250	1,702,010	131,579	5,355,841		113,283
Ending Balance, value at Sep. 30, 2020	$ 13,345			$ 0		$ 0	$ 0	$ 0	$ 1		$ (181)	$ 207,558	$ (194,033)