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Principal Maturities of Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Debt maturing in 2017 $ 2,092  
Debt maturing in 2018 3,342  
Debt maturing in 2019 3,341  
Debt maturing in 2020 2,500  
Debt maturing in 2021 156,500  
Thereafter 3,750  
Total debt 171,525 $ 97,741
Revolving Note (U.S. Dollar)    
Debt Instrument [Line Items]    
Debt maturing in 2021 154,000  
Total debt 154,000 12,000
DEG China Loan    
Debt Instrument [Line Items]    
Debt maturing in 2017 842  
Debt maturing in 2018 842  
Debt maturing in 2019 841  
Total debt 2,525 3,497
DEG Vietnam Loan    
Debt Instrument [Line Items]    
Debt maturing in 2017 1,250  
Debt maturing in 2018 2,500  
Debt maturing in 2019 2,500  
Debt maturing in 2020 2,500  
Debt maturing in 2021 2,500  
Thereafter 3,750  
Total debt $ 15,000 $ 15,000