Quarterly report pursuant to Section 13 or 15(d)

CONDENSED STATEMENTS OF COMPREHENSIVE LOSS

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CONDENSED STATEMENTS OF COMPREHENSIVE LOSS (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
CONDENSED STATEMENTS OF COMPREHENSIVE LOSS        
Net loss $ (22,768) $ (24,738) $ (48,342) $ (47,912)
Other comprehensive income:        
Unrealized (loss) gain on available-for-sale securities (61) 12 (65) 31
Comprehensive loss $ (22,829) $ (24,726) $ (48,407) $ (47,881)