Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Series B Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Comprehensive Deficit [Member]
BALANCE at Dec. 31, 2016	$ 3,059		$ 12	$ 229,275	$ (226,228)
BALANCE, Shares at Dec. 31, 2016	0
BALANCE, Shares at Dec. 31, 2016	12,297,954		12,298,000
Shares issued in Series B preferred stock offering, net issuance costs ($287)	$ 2,413			2,413
Shares issued in Series B preferred stock offering, net issuance costs ($287), shares		3,000
Shares issued in Series B preferred stock in accordance with debt extinguishment	2,697			2,697
Shares issued in Series B preferred stock in accordance with debt extinguishment, shares		3,000
Shares issued in common stock offering, net	1,992		$ 2	1,990
Shares issued in common stock offering, net, shares			2,162,000
Common stock warrants issued in connection with stock offering	64			64
Non-cash compensation recognized on stock options and Employee stock purchase plan ("ESPP")	34			34
Restricted stock grants, net of cancellations	968			968
Restricted stock grants, net of cancellations, shares			(70,000)
Cancellation of shares for payment of withholding tax	(166)			(166)
Cancellation of shares for payment of withholding tax, shares			(111,000)
Employee stock purchase plan	2			2
Employee stock purchase plan, shares			4,000
Warrant repricings due to down round triggers				44	(44)
Comprehensive loss	(6,501)				(6,501)
BALANCE at Sep. 30, 2017	$ 4,562		$ 14	237,321	(232,773)
BALANCE, Shares at Sep. 30, 2017	5,500	6,000
BALANCE, Shares at Sep. 30, 2017	14,283,953		14,283,000
Employee stock purchase plan, shares			2,000
BALANCE at Sep. 30, 2017	$ 4,562		$ 14	237,321	(232,773)
BALANCE, Shares at Sep. 30, 2017	5,500	6,000
BALANCE, Shares at Sep. 30, 2017	14,283,953		14,283,000
Comprehensive loss	$ (1,670)
BALANCE at Sep. 30, 2017	$ 4,562		$ 14	$ 237,321	$ (232,773)
BALANCE, Shares at Sep. 30, 2017	5,500	6,000
BALANCE, Shares at Sep. 30, 2017	14,283,953		14,283,000