Condensed Consolidated Statements of Comprehensive Loss (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		260 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012
Condensed Consolidated Statements of Comprehensive Loss [Abstract]
Net Loss	$ (42,834)	$ (38,402)	$ (117,585)	$ (124,407)	$ (2,053,131)
Other comprehensive loss:
Cumulative translation (loss) gain	(1)	(8)	4	1
Unrealized gain (loss) on investments:
Unrealized holding gain (loss) during the period		15		(30)	(48)
Less: reclassification adjustment for gains (losses) included in net loss			48		48
Net unrealized gain (loss) on investments		15	48	(30)
Comprehensive loss	$ (42,835)	$ (38,395)	$ (117,533)	$ (124,436)	$ (2,053,131)