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Fair Value Measurements (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 29, 2016
Oct. 31, 2015
Oct. 29, 2016
Oct. 31, 2015
Fair Value Disclosures [Abstract]        
Long-lived assets, impairment charges $ 193,000 $ 161,000 $ 193,000 $ 212,000
Remaining unamortized basis $ 337,000 $ 69,000 337,000 $ 211,000
Net book value of long-lived assets     $ 4,500,000