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Consolidated Statements of Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2013
Statement of Comprehensive Income [Abstract]      
Net income (loss) $ 849us-gaap_NetIncomeLoss $ (1,730)us-gaap_NetIncomeLoss $ (3,830)us-gaap_NetIncomeLoss
Other comprehensive (loss) income :      
Pension adjustments (6,254)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent 2,006us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent (658)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent
Comprehensive (loss) income $ (5,405)us-gaap_ComprehensiveIncomeNetOfTax $ 276us-gaap_ComprehensiveIncomeNetOfTax $ (4,488)us-gaap_ComprehensiveIncomeNetOfTax