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Principal Maturities of Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Debt maturing in 2016 $ 4,909  
Debt maturing in 2017 7,504  
Debt maturing in 2018 9,201  
Debt maturing in 2019 67,377  
Debt maturing in 2020 2,500  
Thereafter 6,250  
Total debt 97,741 $ 90,775
U.S. Term Note    
Debt Instrument [Line Items]    
Debt maturing in 2016 2,813  
Debt maturing in 2017 3,750  
Debt maturing in 2018 4,062  
Debt maturing in 2019 36,250  
Total debt 46,875 49,375
Europe Term Loan    
Debt Instrument [Line Items]    
Debt maturing in 2016 1,222  
Debt maturing in 2017 1,630  
Debt maturing in 2018 1,765  
Debt maturing in 2019 15,752  
Total debt 20,369 23,963
U.S. Revolving Note    
Debt Instrument [Line Items]    
Debt maturing in 2019 12,000  
Total debt 12,000 12,000
DEG China Loan    
Debt Instrument [Line Items]    
Debt maturing in 2016 874  
Debt maturing in 2017 874  
Debt maturing in 2018 874  
Debt maturing in 2019 875  
Total debt 3,497 $ 4,805
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  
Thereafter 6,250  
Total debt $ 15,000