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Debt (Details)
$ in Thousands
6 Months Ended 11 Months Ended
Jan. 10, 2014
USD ($)
Aug. 01, 2015
USD ($)
Jan. 08, 2014
Jan. 31, 2013
USD ($)
Credit Agreement        
Debt        
Senior funded debt ratio     2.00  
Threshold amount of acquisitions, mergers or consolidations in excess of which consent is required to be obtained   $ 5,000    
Credit Agreement | Minimum        
Debt        
Fixed charge coverage ratio to be maintained   1.2    
Credit Agreement | Until fiscal quarter ending October 31, 2014        
Debt        
Senior funded debt ratio 2.50      
Credit Agreement | From the fiscal quarter ending January 31, 2015 until the fiscal quarter ending January 31, 2016        
Debt        
Senior funded debt ratio 2.25      
Credit Agreement | Thereafter        
Debt        
Senior funded debt ratio 2.00      
Term Note | 2014 Term Note        
Debt        
Principal amount $ 19,000      
Total amount outstanding   $ 13,617    
Upfront fee $ 95      
Term Note | 2013 Term Note        
Debt        
Principal amount       $ 16,600
Total amount outstanding   $ 7,975    
Term Note | Adjusted annual LIBOR | 2014 Term Note | Minimum        
Debt        
Interest rate added to the reference rate (as a percent)   2.75%    
Term Note | Adjusted annual LIBOR | 2014 Term Note | Maximum        
Debt        
Interest rate added to the reference rate (as a percent)   3.00%    
Term Note | Adjusted annual LIBOR | 2013 Term Note | Minimum        
Debt        
Interest rate added to the reference rate (as a percent)   2.25%    
Term Note | Adjusted annual LIBOR | 2013 Term Note | Maximum        
Debt        
Interest rate added to the reference rate (as a percent)   2.50%    
Term Note | Prime rate | 2014 Term Note        
Debt        
Interest rate added to the reference rate (as a percent)   0.25%    
Term Note | Prime rate | 2013 Term Note        
Debt        
Interest rate added to the reference rate (as a percent)   0.25%    
Term Note | 1 month LIBOR | 2014 Term Note        
Debt        
Interest rate added to the reference rate (as a percent)   2.50%    
Term Note | 1 month LIBOR | 2013 Term Note        
Debt        
Interest rate added to the reference rate (as a percent)   2.50%    
Revolver        
Debt        
Maximum borrowing capacity       $ 2,000
Outstanding amount   $ 0    
Revolver | Adjusted annual LIBOR | Minimum        
Debt        
Interest rate added to the reference rate (as a percent)   2.25%    
Revolver | Adjusted annual LIBOR | Maximum        
Debt        
Interest rate added to the reference rate (as a percent)   2.50%    
Revolver | Prime rate        
Debt        
Interest rate added to the reference rate (as a percent)   0.25%    
Revolver | 1 month LIBOR        
Debt        
Interest rate added to the reference rate (as a percent)   2.50%