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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)
In Thousands, unless otherwise specified
 4 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]    
Net income (loss) $ (17,380)us-gaap_NetIncomeLoss $ 3,086us-gaap_NetIncomeLoss
Foreign currency translation adjustments (1)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax 1us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Comprehensive income (loss) $ (17,381)us-gaap_ComprehensiveIncomeNetOfTax $ 3,087us-gaap_ComprehensiveIncomeNetOfTax