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Variable Interest Entity (Amounts Included in Condensed Consolidated Balance Sheets as a Result of consolidation of SRV) (Details) - USD ($)
$ in Thousands
Oct. 30, 2016
Jan. 31, 2016
Nov. 01, 2015
Feb. 01, 2015
Variable Interest Entity [Line Items]        
Cash $ 173 $ 37,873 $ 209 $ 7,881
Other receivables 3,083 76    
Property and equipment, net 45,275 21,529    
Other assets, net 343 299    
Total assets 155,620 120,620    
Noncontrolling interest in VIE 2,583 1,681    
Total liabilities and shareholders' equity 155,620 120,620    
Variable Interest Entity, Primary Beneficiary [Member] | SRV [Member]        
Variable Interest Entity [Line Items]        
Cash 112 92    
Other receivables 8 9    
Property and equipment, net 3,268 2,823    
Other assets, net 6 11    
Total assets 3,394 2,935    
Other current liabilities 114 527    
Long-term debt 697 727    
Noncontrolling interest in VIE 2,583 1,681    
Total liabilities and shareholders' equity $ 3,394 $ 2,935