Consolidated Statement of Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Additional paid-in capital	Accumulated comprehensive deficit
BALANCE at Dec. 31, 2012	$ 42,662	$ 36	$ 211,165	$ (168,539)
BALANCE, Shares at Dec. 31, 2012		35,873
Non cash compensation recognized on stock options and ESPP	41		41
Restricted stock grants, net of cancellations, shares		1,375
Restricted stock grants, net of cancellations	864	1	863
Cancellation of shares for payment of withholding tax, shares		(5)
Cancellation of shares for payment of withholding tax	(7)		(7)
Employee stock purchase plan (ESPP), shares		19
Employee stock purchase plan (ESPP)	21		21
Comprehensive loss	(6,140)			(6,140)
BALANCE at Mar. 31, 2013	$ 37,441	$ 37	$ 212,083	$ (174,679)
BALANCE, Shares at Mar. 31, 2013		37,262