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Debt - Additional Information (Details)
12 Months Ended
May 04, 2015
USD ($)
Jan. 28, 2017
USD ($)
Jan. 30, 2016
USD ($)
Jan. 31, 2015
USD ($)
Jul. 31, 2018
Aug. 01, 2015
USD ($)
Debt Instrument [Line Items]            
Term loan amount drawn at closing   $ 84,785,000 $ 92,219,000      
Revolving credit facility repaid and terminated   7,500,000 31,500,000 $ 0    
Current debt   16,250,000 10,000,000      
Long-term debt   $ 68,535,000 82,219,000      
Revolving Credit Facility            
Debt Instrument [Line Items]            
Maximum total debt leverage ratio   3.50        
Minimum fixed charge coverage ratio credit facility   1.20        
Revolving Credit Facility | Forecast            
Debt Instrument [Line Items]            
Maximum total debt leverage ratio         3.25  
Term Loan            
Debt Instrument [Line Items]            
Term loan commitment     100,000,000.0      
Term loan amount drawn at closing     100,000,000      
Line of Credit | Revolving Credit Facility            
Debt Instrument [Line Items]            
Revolving credit facility amount     $ 100,000,000.0      
Revolving credit facility amount drawn at closing   $ 0       $ 24,000,000
Revolving credit facility repaid and terminated $ 124,000,000