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Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Unaudited) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net revenues: | $ 14,963 us-gaap_Revenues | $ 22,906 us-gaap_Revenues | $ 19,545 us-gaap_Revenues | $ 25,732 us-gaap_Revenues | $ 23,647 us-gaap_Revenues | $ 20,275 us-gaap_Revenues | $ 20,895 us-gaap_Revenues | $ 27,291 us-gaap_Revenues | $ 83,146 us-gaap_Revenues | $ 92,108 us-gaap_Revenues | $ 104,685 us-gaap_Revenues
Gross profit: | 1,767 us-gaap_GrossProfit | 7,007 us-gaap_GrossProfit | 3,237 us-gaap_GrossProfit | 11,243 us-gaap_GrossProfit | 8,165 us-gaap_GrossProfit | 4,953 us-gaap_GrossProfit | 4,300 us-gaap_GrossProfit | 14,597 us-gaap_GrossProfit | 23,254 us-gaap_GrossProfit | 32,015 us-gaap_GrossProfit | 37,413 us-gaap_GrossProfit
Income (loss) before income taxes: | (10,669)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (340)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (4,023)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 4,846 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 2,179 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (3,106)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (966)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 7,919 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (10,186)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 6,026 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 13,524 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Incomes taxes (benefit): | (1,484)us-gaap_IncomeTaxExpenseBenefit | 57 us-gaap_IncomeTaxExpenseBenefit | (676)us-gaap_IncomeTaxExpenseBenefit | 1,109 us-gaap_IncomeTaxExpenseBenefit | 397 us-gaap_IncomeTaxExpenseBenefit | (478)us-gaap_IncomeTaxExpenseBenefit | (273)us-gaap_IncomeTaxExpenseBenefit | 1,612 us-gaap_IncomeTaxExpenseBenefit | (994)us-gaap_IncomeTaxExpenseBenefit | 1,258 us-gaap_IncomeTaxExpenseBenefit | (3,527)us-gaap_IncomeTaxExpenseBenefit
Net income (loss): | $ (9,185)us-gaap_NetIncomeLoss | $ (397)us-gaap_NetIncomeLoss | $ (3,347)us-gaap_NetIncomeLoss | $ 3,737 us-gaap_NetIncomeLoss | $ 1,782 us-gaap_NetIncomeLoss | $ (2,628)us-gaap_NetIncomeLoss | $ (693)us-gaap_NetIncomeLoss | $ 6,307 us-gaap_NetIncomeLoss | $ (9,192)us-gaap_NetIncomeLoss | $ 4,768 us-gaap_NetIncomeLoss | $ 17,051 us-gaap_NetIncomeLoss
Income per common share-basic: | $ (0.76)us-gaap_EarningsPerShareBasic | $ (0.03)us-gaap_EarningsPerShareBasic | $ (0.26)us-gaap_EarningsPerShareBasic | $ 0.29 us-gaap_EarningsPerShareBasic | $ 0.14 us-gaap_EarningsPerShareBasic | $ (0.21)us-gaap_EarningsPerShareBasic | $ (0.05)us-gaap_EarningsPerShareBasic | $ 0.49 us-gaap_EarningsPerShareBasic | $ (0.74)us-gaap_EarningsPerShareBasic | $ 0.37 us-gaap_EarningsPerShareBasic | $ 1.34 us-gaap_EarningsPerShareBasic
Income per common share-diluted: | $ (0.76)us-gaap_EarningsPerShareDiluted | $ (0.03)us-gaap_EarningsPerShareDiluted | $ (0.26)us-gaap_EarningsPerShareDiluted | $ 0.29 us-gaap_EarningsPerShareDiluted | $ 0.14 us-gaap_EarningsPerShareDiluted | $ (0.21)us-gaap_EarningsPerShareDiluted | $ (0.05)us-gaap_EarningsPerShareDiluted | $ 0.48 us-gaap_EarningsPerShareDiluted | $ (0.74)us-gaap_EarningsPerShareDiluted | $ 0.36 us-gaap_EarningsPerShareDiluted | $ 1.29 us-gaap_EarningsPerShareDiluted

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