CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Deficit) (USD $) In Thousands	Total	Common Stock	Additional Paid-in- Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2009	$ 64,199	$ 669	$ 305,994	$ (242,467)	$ 3
Beginning balance (in shares) at Dec. 31, 2009		66,933
Net loss	(73,109)			(73,109)
Restricted stock grants (in shares)		69
Restricted stock grants	1	1
Amortization of restricted stock	4,374		4,374
Forfeiture of restricted stock grants (in shares)		(6)
Shares repurchased and cancelled (in shares)		(80)
Shares repurchased and cancelled	(1,282)	(1)	(1,281)
Issuance of common stock (in shares)		30
Issuance of common stock	326		326
ESPP compensation expense	341		341
Stock option compensation expense	3,069		3,069
Warrant exercise (in shares)		3,040
Warrant exercise	49,547	31	49,516
Exercise of stock options (in shares)		273
Exercise of stock options	1,803	3	1,800
Other comprehensive (loss) Income	(2)				(2)
Ending balance at Dec. 31, 2010	49,267	703	364,139	(315,576)	1
Ending balance (in shares) at Dec. 31, 2010		70,259
Net loss	(102,027)			(102,027)
Restricted stock grants (in shares)		1,174
Restricted stock grants		11	(11)
Amortization of restricted stock	3,317		3,317
Forfeiture of restricted stock grants (in shares)		(119)
Forfeiture of restricted stock grants	1		1
Issuance of common stock (in shares)		155
Issuance of common stock	632	1	631
ESPP compensation expense	795		795
Stock option compensation expense	3,788		3,788
Exercise of stock options (in shares)		33
Exercise of stock options	169		169
Convertible note conversion option, net of tax of $22,717	35,634		35,634
Other comprehensive (loss) Income	14				14
Ending balance at Dec. 31, 2011	(8,410)	715	408,463	(417,603)	15
Ending balance (in shares) at Dec. 31, 2011		71,502
Net loss	(118,312)			(118,312)
Restricted stock grants (in shares)		1,855
Restricted stock grants		19	(19)
Amortization of restricted stock	1,980		1,980
Forfeiture of restricted stock grants (in shares)		(764)
Forfeiture of restricted stock grants		(8)	8
Issuance of common stock (in shares)		490
Issuance of common stock	502	5	497
ESPP compensation expense	923		923
Stock option compensation expense	4,029		4,029
Consideration for equity option component of extinguished convertible debt	(18,690)		(18,690)
Other comprehensive (loss) Income	(319)				(319)
Ending balance at Dec. 31, 2012	$ (138,297)	$ 731	$ 397,191	$ (535,915)	$ (304)
Ending balance (in shares) at Dec. 31, 2012		73,083