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Condensed Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Statement of Comprehensive Income [Abstract] |  |  |  |
Net loss | $ (8,832) | $ (5,093) | $ (35,228) | $ (22,107)
Unrealized gain (loss) on cash equivalents and marketable securities, net of tax | (5) | 14 | (5) | (24)
Total comprehensive loss | $ (8,837) | $ (5,079) | $ (35,233) | $ (22,131)

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