CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Cashless	Restricted Stock Units (RSUs)	Common Stock	Common Stock Cashless	Common Stock Restricted Stock Units (RSUs)	Additional paid-in capital	Additional paid-in capital Cashless	Additional paid-in capital Restricted Stock Units (RSUs)	Accumulated deficit	Accumulated deficit Cashless	Accumulated deficit Restricted Stock Units (RSUs)	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cashless	Accumulated Other Comprehensive Income (Loss) Restricted Stock Units (RSUs)
Beginning Balance at Dec. 31, 2012	$ 27,630			$ 459			$ 362,422			$ (335,211)			$ (40)
Beginning Balance (in shares) at Dec. 31, 2012				45,867
Net loss	(7,294)			0			0			(7,294)			0
Other comprehensive income (loss)	(79)			0			0			0			(79)
Share-based compensation	630			0			630			0			0
Net distribution of common stock pursuant to restricted stock unit award plan (in shares)				826
Net distribution of common stock pursuant to restricted stock unit award plan	1			8			(7)			0			0
Common shares withheld for withholding taxes (in shares)					(1)	(321)
Common shares withheld for withholding taxes		(4)	(712)		0	(3)		(4)	(709)		0	0		0	0
Net issuance of common stock pursuant to cashless exercise of stock options (in shares)					4
Net issuance of common stock pursuant to cashless exercise of stock options		0			0			0			0			0
Issuance of common stock under “at the market” offerings, net of offering costs of $8 (in shares)				114
Issuance of common stock under “at the market” offerings, net of offering costs of $8	243			1			242			0			0
Issuance of common stock for exercise of stock options (in shares)				7
Issuance of common stock for exercise of stock options	9			0			9			0			0
Ending Balance at Jun. 30, 2013	$ 20,424			$ 465			$ 362,583			$ (342,505)			$ (119)
Ending Balance (in shares) at Jun. 30, 2013				46,496