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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) [Abstract]    
Net loss $ (8,610) $ (5,855)
Other comprehensive gain, net of tax:    
Change in unrealized gain on investments, net of tax 9 8
Total other comprehensive gain, net of tax 9 8
Comprehensive loss $ (8,601) $ (5,847)