Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended			263 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
Net loss	$ (169,366)	$ (160,804)	$ (170,560)	$ (2,104,912)
Other comprehensive loss:
Cumulative translation (loss) gain	(2)	(3)	(6)	(6)
Unrealized gain (loss) on investments:
Unrealized holding gain (loss) during the period		(27)	361	48
Less: reclassification adjustment for gains (losses) included in net loss	(48)			(48)
Net unrealized gain (loss) on investments	(48)	(27)	361
Comprehensive loss	$ (169,416)	$ (160,834)	$ (170,205)	$ (2,104,918)