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Revolving Line Of Credit (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Jul. 24, 2017
Jan. 28, 2017
Line Of Credit Facility [Line Items]            
Amortization of deferred financing fees   $ 88   $ 174    
Wells Fargo Senior Secured Revolving Credit Facility            
Line Of Credit Facility [Line Items]            
Line of credit facility, maximum borrowing capacity         $ 15,000  
Line Of Credit $ 110,904   $ 110,904   150,000 $ 67,110
Line of credit facility, amount outstanding 110,904   110,904   $ 150,000 67,110
Amounts in depository under lock-box arrangements 9,160   $ 9,160     6,138
Line of credit , maturity date     Dec. 03, 2020      
Deferred financing fees outstanding 426   $ 426     $ 295
Amortization of deferred financing fees 40,000 $ 41,000 $ 80,000 $ 80,000    
Revolving credit facility, covenant term     The Revolving Line of Credit also requires us to maintain a minimum availability at all times of not less than 10% of the gross borrowing base, and in any event, not less than $5,000      
Wells Fargo Senior Secured Revolving Credit Facility | Minimum            
Line Of Credit Facility [Line Items]            
Line of credit facility gross borrowing base percentage     10.00%      
Line of credit facility available borrowing capacity 5,000   $ 5,000      
Wells Fargo Stand-by Commercial Letters of Credit            
Line Of Credit Facility [Line Items]            
Net borrowing available under revolving line of credit $ 1,200   $ 1,200