Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common stock [Member]	Additional paid-in capital [Member]	Accumulated comprehensive income (deficit) [Member]
BALANCE at Dec. 31, 2011	$ 64,860	$ 36	$ 207,927	$ (143,103)
BALANCE, Shares at Dec. 31, 2011		35,612,000
Exercise of common stock options	16		16
Exercise of common stock options, shares	32,000	32,000
Non cash compensation recognized on stock options and ESPP	66		66
Restricted stock grants, net of cancellations	3,883		3,883
Restricted stock grants, net of cancellations, shares		574,000
Cancellation of shares for payment of withholding tax	(40)		(40)
Cancellation of shares for payment of withholding tax, shares		(23,000)
Employee stock purchase plan	66		66
Employee stock purchase plan, shares		53,000
Shares repurchased and cancelled	(753)		(753)
Shares repurchased and cancelled, shares		(375,000)
Comprehensive loss	(25,436)			(25,436)
BALANCE at Dec. 31, 2012	42,662	36	211,165	(168,539)
BALANCE, Shares at Dec. 31, 2012		35,873,000
Non cash compensation recognized on stock options and ESPP	168		168
Restricted stock grants, net of cancellations	3,365	1	3,364
Restricted stock grants, net of cancellations, shares		1,179,000
Cancellation of shares for payment of withholding tax	(114)		(114)
Cancellation of shares for payment of withholding tax, shares		(96,000)
Employee stock purchase plan	36		36
Employee stock purchase plan, shares		38,000
Comprehensive loss	(27,946)			(27,946)
BALANCE at Dec. 31, 2013	18,171	37	214,619	(196,485)
BALANCE, Shares at Dec. 31, 2013	36,994,318	36,994,000
Exercise of common stock options	6		6
Exercise of common stock options, shares	4,000	4,000
Non cash compensation recognized on stock options and ESPP	157		157
Restricted stock grants, net of cancellations	3,495	1	3,494
Restricted stock grants, net of cancellations, shares		1,421,000
Cancellation of shares for payment of withholding tax	(391)		(391)
Cancellation of shares for payment of withholding tax, shares		(292,000)
Employee stock purchase plan	21		21
Employee stock purchase plan, shares		27,000
Issuance of common stock in a private placement	5,242	7	5,235
Issuance of common stock in a private placement, shares		6,846,000
Comprehensive loss	(11,799)			(11,799)
BALANCE at Dec. 31, 2014	$ 14,902	$ 45	$ 223,141	$ (208,284)
BALANCE, Shares at Dec. 31, 2014	45,000,891	45,000,000