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Investments - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
MXN / $
Sep. 30, 2016
USD ($)
MXN / $
Sep. 30, 2017
USD ($)
MXN / $
Sep. 30, 2016
USD ($)
MXN / $
Dec. 31, 2016
USD ($)
MXN / $
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses), net of taxes $ (326,000) $ (138,000) $ 672,000 $ (270,000)  
Grupo Vasconia S.A.B.          
Schedule of Equity Method Investments [Line Items]          
Percentage of ownership in equity method investment 30.00%   30.00%    
Exchange rate at period end - MXN to USD | MXN / $ 18.25   18.25   20.70
Increase decrease in equity method investment     $ 1,300,000 (2,500,000)  
Equity in earnings (losses), net of taxes $ (326,000) (138,000) 672,000 (459,000)  
Equity in earnings (losses), deferred taxes expenses(benefits) 100,000 $ 100,000 (200,000) $ 500,000  
Fair value of investment 34,300,000   34,300,000   $ 29,000,000
Carrying value of investment 24,200,000   24,200,000   22,500,000
Grupo Vasconia S.A.B. | Prepaid expenses and other current assets          
Schedule of Equity Method Investments [Line Items]          
Due from related party 47,000   47,000   83,000
Grupo Vasconia S.A.B. | Accounts payable and accrued expenses          
Schedule of Equity Method Investments [Line Items]          
Due to related party $ 70,000   $ 70,000   $ 220,000
Grupo Vasconia S.A.B. | Transaction 02          
Schedule of Equity Method Investments [Line Items]          
Average daily exchange rate for period - MXN to USD | MXN / $ 17.81 18.73      
Grupo Vasconia S.A.B. | Transaction 02 | Minimum          
Schedule of Equity Method Investments [Line Items]          
Average daily exchange rate for period - MXN to USD | MXN / $     17.81 17.79  
Grupo Vasconia S.A.B. | Transaction 02 | Maximum          
Schedule of Equity Method Investments [Line Items]          
Average daily exchange rate for period - MXN to USD | MXN / $     20.30 18.27