Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Comprehensive Deficit [Member]
BALANCE at Dec. 31, 2016	$ 2,504	$ 12	$ 227,889	$ (225,397)
BALANCE, Shares at Dec. 31, 2016	12,297,954	12,298,000
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")	23		23
Restricted stock grants, net of cancellations	811		811
Restricted stock grants, net of cancellations, shares		(70,000)
Cancellation of shares for payment of withholding tax	(122)		(122)
Cancellation of shares for payment of withholding tax, shares		(95,000)
Employee stock purchase plan	2		2
Employee stock purchase plan, shares		2,002
Comprehensive loss	(4,806)			(4,806)
BALANCE at Jun. 30, 2017	$ 468	$ 14	230,657	(230,203)
BALANCE, Shares at Jun. 30, 2017	14,297,018	14,297,000
Comprehensive loss	$ (2,574)
BALANCE at Jun. 30, 2017	$ 468	$ 14	$ 230,657	$ (230,203)
BALANCE, Shares at Jun. 30, 2017	14,297,018	14,297,000