Fair Value Measurements (Narrative) (Details)	3 Months Ended
May 05, 2018 USD ($)
Fair Value Disclosures [Abstract]
Long-lived assets, impairment charges	$ 646,000
Remaining unamortized basis	$ 662,000

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration