Consolidated Statement of Stockholders' Equity (USD $) In Thousands	Total	Common stock	Additional paid-in capital	Accumulated comprehensive deficit
Beginning balance at Dec. 31, 2011	$ 64,860	$ 36	$ 207,927	$ (143,103)
Beginning balance, shares at Dec. 31, 2011		35,612
Exercise of common stock options, shares		14
Exercise of common stock options	11		11
Non cash compensation recognized on stock options and ESPP	30		30
Restricted stock grants, net of cancellations, shares		589
Restricted stock grants, net of cancellations	2,124		2,124
Cancellation of shares for payment of withholding tax, shares		(12)
Cancellation of shares for payment of withholding tax	(21)		(21)
Employee stock purchase plan (ESPP), shares		45
Employee stock purchase plan (ESPP)	55		55
Shares repurchased and cancelled, shares		(375)
Shares repurchased and cancelled	(753)		(753)
Comprehensive loss	(16,476)			(16,476)
Ending balance at Jun. 30, 2012	$ 49,830	$ 36	$ 209,373	$ (159,579)
Ending balance, shares at Jun. 30, 2012		35,873