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Consolidated Statements of Comprehensive Loss (USD $)
 3 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Statement of Comprehensive Income [Abstract]    
Net income (loss) $ (3,178,000)us-gaap_NetIncomeLoss $ (3,855,000)us-gaap_NetIncomeLoss
Other comprehensive income (loss) :    
Pension adjustments 495,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax 321,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Comprehensive income (loss) $ (2,683,000)us-gaap_ComprehensiveIncomeNetOfTax $ (3,534,000)us-gaap_ComprehensiveIncomeNetOfTax