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Segment Information Schedule of Accounts Receivable by Major Customers (Details)
Jan. 29, 2017
Jan. 31, 2016
Accounts Receivable by Major Customers    
Accounts receivable from significant customers (in percent) 29.00% 28.00%
Customer B (AR)    
Accounts Receivable by Major Customers    
Accounts receivable from significant customers (in percent) 19.00% 21.00%
Customer C (AR)    
Accounts Receivable by Major Customers    
Accounts receivable from significant customers (in percent) 10.00% 7.00%