Consolidated Statement of Stockholders' Equity - 6 months ended Jun. 30, 2016 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Comprehensive Deficit [Member]
BALANCE at Dec. 31, 2015	$ 14,026	$ 46	$ 224,867	$ (210,887)
BALANCE, Shares at Dec. 31, 2015	45,729,272	45,729,272
Non-cash compensation recognized on stock options and ESPP	$ 76		76
Restricted stock grants, net of cancellations	689	$ 1	688
Restricted stock grants, net of cancellations, shares		1,391,000
Cancellation of shares for payment of withholding tax	(183)		(183)
Cancellation of shares for payment of withholding tax, shares		(281,000)
Employee stock purchase plan	7		7
Employee stock purchase plan, shares		14,000
Comprehensive loss	(6,984)			(6,984)
BALANCE at Jun. 30, 2016	$ 7,631	$ 47	$ 225,455	$ (217,871)
BALANCE, Shares at Jun. 30, 2016	46,853,150	46,853,150,000