Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Consolidated Statement of Comprehensive Loss:      
Net loss $ (79,920) $ (85,940) $ (62,182)
Other comprehensive loss:      
Net change in unrealized loss on available-for-sale marketable securities (39) (40) (34)
Reclassification adjustments for net realized gain (loss) on available-for-sale marketable securities 0 0 0
Other comprehensive loss (39) (40) (34)
Comprehensive loss $ (79,959) $ (85,980) $ (62,216)