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Fair Value Measurements (Narrative) (Details) - USD ($)
3 Months Ended
Apr. 30, 2016
May. 02, 2015
Fair Value Disclosures [Abstract]    
Long-lived assets, gross carrying amount $ 5,000,000 $ 529,000
Long-lived assets, impairment charges $ 0 51,000
Remaining unamortized basis   $ 143,000