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Debt - Schedule of Short Term Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Short-term Debt [Line Items]    
Short term debt $ 5,456 $ 2,972
Other Debt [Member]    
Short-term Debt [Line Items]    
Short term debt 6 7
Japan [Member] | Line of Credit [Member]    
Short-term Debt [Line Items]    
Short term debt 3,915 2,750
Japan [Member] | Receivables Financing Facility [Member]    
Short-term Debt [Line Items]    
Short term debt 854 $ 215
Austria [Member] | Loans Due Through March 2019 [Member]    
Short-term Debt [Line Items]    
Short term debt $ 681