CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Series B Convertible Redeemable Preferred	Series E Convertible Redeemable Preferred	Series F Convertible Redeemable Preferred	Series G Convertible Redeemable Preferred	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Beginning, shares at Dec. 31, 2013	239,400				7,555,317	(6,704)
Beginning, amount at Dec. 31, 2013	$ 2				$ 874	$ (64)	$ 131,652	$ (830)	$ (128,303)	$ 3,331
Issuance of common stock pursuant to warrant exercises, Shares					4,742,632
Issuance of common stock pursuant to warrant exercises, Amount					$ 47		2,801			2,848
Settlement of derivative liabilities pursuant to warrants exercised for cash							57			57
Issuance of common stock pursuant to cashless warrant exercises, Shares					868,565
Issuance of common stock pursuant to cashless warrant exercises, Amount					$ 9		(9)
Warrants issued to secure line of credit borrowing facility							128			128
Issuance of common stock pursuant to option exercises, Shares					98,617
Issuance of common stock pursuant to option exercises, Amount					$ 1		66			67
Recognition of beneficial conversion feature on convertible debt							296			296
Warrants issued to consultants as compensation							53			53
Conversion of related party notes payable to common stock, shares					154,607
Conversion of related party notes payable to common stock, amount					$ 2		83			85
Stock-based compensation expense, shares					94,116
Stock-based compensation expense, amount					$ 1		855			856
Addition/reduction in minimum pension liability								(744)		(744)
Foreign currency translation adjustment								(20)		(20)
Dividends on preferred stock									(51)	(51)
Net loss									(7,940)	(7,940)
Ending, shares at Dec. 31, 2014	239,400				93,513,854	(6,704)
Ending, amount at Dec. 31, 2014	$ 2				$ 934	$ (64)	135,982	(1,594)	(136,294)	(1,034)
Issuance of Series E Convertible Redeemable Preferred Stock for cash, net of issuance costs, Shares		10,022
Issuance of Series E Convertible Redeemable Preferred Stock for cash, net of issuance costs, Amount							9,955			9,955
Conversion of related party debt into Series E Convertible Redeemable Preferred Stock, Shares		1,978
Conversion of related party debt into Series E Convertible Redeemable Preferred Stock, Amount							1,978			1,978
Issuance of Common Stock in payment of Series E Preferred dividends, Shares					478,664
Issuance of Common Stock in payment of Series E Preferred dividends, Amount					$ 5		769		(774)
Issuance of common stock pursuant to cashless warrant exercises, Shares					45,376
Issuance of common stock pursuant to cashless warrant exercises, Amount					$ 1		(1)
Issuance of common stock pursuant to option exercises, Shares					39,705
Issuance of common stock pursuant to option exercises, Amount							33			33
Recognition of beneficial conversion feature on convertible debt							146			146
Warrants modified in lieu of cash as compensation							80			80
Stock-based compensation expense, amount							96			96
Addition/reduction in minimum pension liability								332		332
Foreign currency translation adjustment								67		67
Dividends on preferred stock									(291)	(291)
Net loss									(8,534)	(8,534)
Ending, shares at Dec. 31, 2015	239,400	12,000			94,077,599	(6,704)
Ending, amount at Dec. 31, 2015	$ 2				$ 940	$ (64)	149,902	(1,195)	(145,893)	3,692
Issuance of common stock pursuant to cashless warrant exercises, Shares					144,459
Issuance of common stock pursuant to cashless warrant exercises, Amount					$ 1		(1)
Issuance of common stock pursuant to option exercises, Shares					12,626
Issuance of common stock pursuant to option exercises, Amount							3			3
Recognition of beneficial conversion feature on convertible debt							219			219
Stock-based compensation expense, amount							1,162			1,162
Addition/reduction in minimum pension liability								(347)		(347)
Foreign currency translation adjustment								(1)		(1)
Dividends on preferred stock					$ 10		1,286		(1,347)	(51)
Issuance of Series F Convertible Redeemable Preferred Stock for cash, net of issuance costs, Shares			2,000
Issuance of Series F Convertible Redeemable Preferred Stock for cash, net of issuance costs, Amount							1,979			1,979
Issuance of Series G Convertible Redeemable Preferred Stock for cash, net of issuance costs, Shares				1,625
Issuance of Series G Convertible Redeemable Preferred Stock for cash, net of issuance costs, Amount							1,614			1,614
Issuance of Series G Convertible Redeemable Preferred Stock in exchange for Common Stock, Shares				4,396	(3,383,830)
Issuance of Series G Convertible Redeemable Preferred Stock in exchange for Common Stock, Amount					$ (34)		31			(3)
Net loss					$ 0				(9,527)	(9,527)
Ending, shares at Dec. 31, 2016	239,400	12,000	2,000	6,021	91,853,499	(6,704)
Ending, amount at Dec. 31, 2016	$ 2				$ 917	$ (64)	$ 156,195	$ (1,543)	$ (156,676)	$ (1,260)