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Quarterly Financial Information (Unaudited) - Summary of Unaudited Quarterly Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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 Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 55,361 us-gaap_Revenues | $ 44,330 us-gaap_Revenues | $ 37,270 us-gaap_Revenues | $ 48,284 us-gaap_Revenues | $ 65,335 us-gaap_Revenues | $ 92,673 us-gaap_Revenues | $ 91,124 us-gaap_Revenues | $ 85,921 us-gaap_Revenues | $ 185,245 us-gaap_Revenues | $ 335,053 us-gaap_Revenues | $ 344,288 us-gaap_Revenues
Gross profit | 12,506 us-gaap_GrossProfit | 10,486 us-gaap_GrossProfit | 3,987 us-gaap_GrossProfit | 10,068 us-gaap_GrossProfit | 12,039 us-gaap_GrossProfit | 20,383 us-gaap_GrossProfit | 19,024 us-gaap_GrossProfit | 16,848 us-gaap_GrossProfit | 37,047 us-gaap_GrossProfit | 68,294 us-gaap_GrossProfit | 72,443 us-gaap_GrossProfit
Net loss attributable to common shareholders | $ (4,446)us-gaap_NetIncomeLoss | $ (8,832)us-gaap_NetIncomeLoss | $ (17,415)us-gaap_NetIncomeLoss | $ (8,981)us-gaap_NetIncomeLoss | $ (21,306)us-gaap_NetIncomeLoss | $ (5,093)us-gaap_NetIncomeLoss | $ (7,892)us-gaap_NetIncomeLoss | $ (9,122)us-gaap_NetIncomeLoss | $ (39,674)us-gaap_NetIncomeLoss | $ (43,413)us-gaap_NetIncomeLoss | $ (89,266)us-gaap_NetIncomeLoss
Earnings Per Share, Basic ($ per share) | $ (0.10)us-gaap_EarningsPerShareBasic | $ (0.23)us-gaap_EarningsPerShareBasic | $ (0.51)us-gaap_EarningsPerShareBasic | $ (0.26)us-gaap_EarningsPerShareBasic |  |  |  |  |  |  |
Earnings Per Share, Diluted ($ per share) | $ (0.13)us-gaap_EarningsPerShareDiluted | $ (0.23)us-gaap_EarningsPerShareDiluted | $ (0.51)us-gaap_EarningsPerShareDiluted | $ (0.26)us-gaap_EarningsPerShareDiluted |  |  |  |  |  |  |
Basic and diluted net loss per common share (dollars per share) |  |  |  |  | $ (0.63)us-gaap_EarningsPerShareBasicAndDiluted | $ (0.15)us-gaap_EarningsPerShareBasicAndDiluted | $ (0.23)us-gaap_EarningsPerShareBasicAndDiluted | $ (0.27)us-gaap_EarningsPerShareBasicAndDiluted | $ (1.05)us-gaap_EarningsPerShareBasicAndDiluted | $ (1.28)us-gaap_EarningsPerShareBasicAndDiluted | $ (2.72)us-gaap_EarningsPerShareBasicAndDiluted

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