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Consolidated Statements of Comprehensive Loss (USD $)
In Thousands, unless otherwise specified
3 Months Ended 134 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Consolidated Statements of Comprehensive Loss      
Net loss $ (17,458) $ (13,137) $ (336,347)
Other comprehensive income:      
Unrealized gain on available-for-sale securities 1 33 15
Other comprehensive income, before income taxes 1 33 15
Other comprehensive income 1 33 15
Comprehensive loss $ (17,457) $ (13,104) $ (336,332)