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Advances to and Investments in Foreign Joint Ventures' Operations - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Apr. 30, 2007
Dec. 31, 2006
Schedule Of Equity Method Investments [Line Items]                        
Equity income from foreign joint ventures' operations                 $ 530 $ 740    
Dividends received                 589 1,170    
Net sales $ 9,397 $ 8,673 $ 11,444 $ 8,298 $ 7,690 $ 13,780 $ 12,302 $ 15,311 37,812 49,083    
Foreign joint ventures' operations related expenses                 $ 245 393    
BOMAY                        
Schedule Of Equity Method Investments [Line Items]                        
Equity method investment, ownership percentage 40.00%               40.00%      
Investment in joint ventures                     $ 1,000 $ 1,000
Equity income from foreign joint ventures' operations                 $ 800 970    
Dividends received                 590 1,030    
BOMAY | Affiliated Entity                        
Schedule Of Equity Method Investments [Line Items]                        
Net sales                 110 190    
Accounts receivable from foreign joint venture $ 40       0       $ 40 0    
MIEFE                        
Schedule Of Equity Method Investments [Line Items]                        
Equity method investment, ownership percentage 41.00%               41.00%      
Equity income from foreign joint ventures' operations                 $ (270) (230)    
Dividends received                 0 140    
MIEFE | Accrued in Accounts Payable and Other Liabilities                        
Schedule Of Equity Method Investments [Line Items]                        
Remaining investment from joint venture $ 270               270      
MIEFE | Affiliated Entity                        
Schedule Of Equity Method Investments [Line Items]                        
Net sales                 0 50    
Accounts receivable from foreign joint venture $ 0       $ 50       $ 0 $ 50