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Factor Receivable (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Line of Credit Facility, Collateral .85    
Line of Credit Facility, Maximum Borrowing Capacity $ 30,000 $ 30,000  
Open non-negotiated letters of credit   $ 812 $ 447
Letters Of Credit SubLimit Capacity Amount $ 15,000    
Debt Instrument, Basis Spread on Variable Rate 0.50%    
Factoring Fee 0.20%    
First Cost and Private Label business [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Factoring Fee 0.14%    
London Interbank Offered Rate (LIBOR) [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 2.50%