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v2.4.1.9

Quarterly Summarized Financial Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 16,480 us-gaap_Revenues | $ 14,149 us-gaap_Revenues | $ 12,606 us-gaap_Revenues | $ 10,967 us-gaap_Revenues | $ 10,106 us-gaap_Revenues | $ 8,403 us-gaap_Revenues | $ 5,500 us-gaap_Revenues | $ 2,342 us-gaap_Revenues | $ 54,202 us-gaap_Revenues | $ 26,351 us-gaap_Revenues |
Net (loss) income | $ (19,657)us-gaap_NetIncomeLoss | $ (26,050)us-gaap_NetIncomeLoss | $ 15,323 us-gaap_NetIncomeLoss | $ (25,980)us-gaap_NetIncomeLoss | $ (15,411)us-gaap_NetIncomeLoss | $ (48,884)us-gaap_NetIncomeLoss | $ (39,774)us-gaap_NetIncomeLoss | $ (62,158)us-gaap_NetIncomeLoss | $ (56,364)us-gaap_NetIncomeLoss | $ (166,227)us-gaap_NetIncomeLoss | $ (179,184)us-gaap_NetIncomeLoss
Net loss per share : |  |  |  |  |  |  |  |  |  |  |
Basic | $ (0.11)us-gaap_EarningsPerShareBasic | $ (0.15)us-gaap_EarningsPerShareBasic | $ 0.09 us-gaap_EarningsPerShareBasic | $ (0.15)us-gaap_EarningsPerShareBasic | $ (0.09)us-gaap_EarningsPerShareBasic | $ (0.29)us-gaap_EarningsPerShareBasic | $ (0.26)us-gaap_EarningsPerShareBasic | $ (0.41)us-gaap_EarningsPerShareBasic | $ (0.32)us-gaap_EarningsPerShareBasic | $ (1.03)us-gaap_EarningsPerShareBasic | $ (1.24)us-gaap_EarningsPerShareBasic
Diluted | $ (0.11)us-gaap_EarningsPerShareDiluted | $ (0.17)us-gaap_EarningsPerShareDiluted | $ 0.08 us-gaap_EarningsPerShareDiluted | $ (0.15)us-gaap_EarningsPerShareDiluted | $ (0.27)us-gaap_EarningsPerShareDiluted | $ (0.29)us-gaap_EarningsPerShareDiluted | $ (0.34)us-gaap_EarningsPerShareDiluted | $ (0.43)us-gaap_EarningsPerShareDiluted | $ (0.36)us-gaap_EarningsPerShareDiluted | $ (1.28)us-gaap_EarningsPerShareDiluted | $ (1.24)us-gaap_EarningsPerShareDiluted

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