Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Common Shares, $0.001 Par Value Per Share	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2012	$ 68,211	$ 15	$ 346,301	$ (270,042)	$ (8,063)
Beginning balance, Shares at Dec. 31, 2012		14,582,000
Issuance of common stock pursuant to public offering, net of offering costs, shares		1,725,000
Issuance of common stock pursuant to public offering, net of offering costs	140,995	1	140,994
Issuance of common stock pursuant to share-based awards, shares		38,000
Issuance of common stock pursuant to share-based awards	888		888
Share-based compensation	4,448		4,448
Net loss	(12,959)			(12,959)
Other comprehensive income	420				420
Ending balance at Mar. 31, 2013	$ 202,003	$ 16	$ 492,631	$ (283,001)	$ (7,643)
Ending balance, Shares at Mar. 31, 2013		16,345,000