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Condensed consolidated statement of comprehensive income Statement - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Statement of Comprehensive Income [Abstract] |  |  |  |
Net loss | $ (4,935) | $ (9,977) | $ (14,470) | $ (23,711)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |  |
Unrealized gain on marketable securities | 32 | 0 | 88 | 0
Comprehensive loss | $ (4,903) | $ (9,977) | $ (14,382) | $ (23,711)

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