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Revolving Line Of Credit - Additional Information (Details) - USD ($)
 3 Months Ended
Apr. 30, 2016
May. 02, 2015
Jan. 30, 2016
Wells Fargo Senior Secured Revolving Credit Facility      
Line Of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity $ 135,000,000    
Line of credit facility, amount outstanding 70,664,000   $ 31,202,000
Amounts in depository under lock-box arrangements $ 7,325,000   $ 5,939,000
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    
Line of credit , maturity date Dec. 03, 2019    
Deferred financing fees outstanding $ 415,000    
Amortization of deferred financing fees 39,000 $ 31,000  
Wells Fargo Senior Secured Revolving Credit Facility | Minimum      
Line Of Credit Facility [Line Items]      
Line of credit facility available borrowing capacity $ 5,000,000    
Line of credit facility gross borrowing base percentage 10.00%    
Wells Fargo Stand-by Commercial Letters of Credit      
Line Of Credit Facility [Line Items]      
Net borrowing available under revolving line of credit $ 1,200,000