Consolidated Statements Changes in Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock [Member]		Common Stock [Member] Series B Preferred Stock [Member]	Convertible Preferred Stock [Member] Series B Preferred Stock [Member]	Convertible Preferred Stock [Member] Series G Preferred Stock [Member]	Convertible Preferred Stock [Member] Series H-1 Preferred Stock [Member]	Convertible Preferred Stock [Member] Series I-1 Preferred Stock [Member]	Convertible Preferred Stock [Member] Series I-2 Preferred Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2014		$ 321	$ 2				$ 5				$ 95,063	$ (94,749)
Beginning balance, shares at Dec. 31, 2014			1,596,000	[1]		300,000	5,000,000	1,000
Issuance of common stock
For services		105									105
For services, shares	[1]		20,000
From exercises of warrants		3,166									3,166
From exercises of warrants, shares	[1]		517,000
For fractional shares rounding up due to reverse stock split, shares	[1]		5,000
Issuance of common stock from conversion of preferred stock			$ 1								(1)
Issuance of common stock from conversion of preferred stock, shares			671,000	[1]	27,881	(50,000)		(1,000)
Warrant modification		40									40
Stock-based compensation		597									597
Net loss		(2,635)										(2,635)
Ending balance at Dec. 31, 2015		1,594	$ 3				$ 5				98,970	(97,384)
Ending balance, shares at Dec. 31, 2015			2,809,000	[1]		250,000	5,000,000
Issuance of common stock
For services		105									105
For services, shares	[1]		58,000
From exercises of warrants		1,852	$ 1								1,851
From exercises of warrants, shares	[1]		901,000
Issuance of preferred stock, shares									2,000	4,000
Issuance of common stock from conversion of preferred stock, shares	[1]		183,000
Stock-based compensation		972									972
Net loss		(1,079)										(1,079)
Ending balance at Dec. 31, 2016		$ 3,444	$ 4				$ 5				$ 101,898	$ (98,463)
Ending balance, shares at Dec. 31, 2016			3,951,000	[1]		250,000	5,000,000		2,000	4,000

[1] See Note 1, “Reverse Stock Split”