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Debt - Schedule of Short Term Debt (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Short-term Debt [Line Items]    
Short term debt $ 10,931 $ 3,986
Term Loan Facility [Member]    
Short-term Debt [Line Items]    
Short term debt 6,500 0
Japan [Member] | Line of Credit [Member]    
Short-term Debt [Line Items]    
Short term debt 3,701 2,724
Japan [Member] | Receivables Financing Facility [Member]    
Short-term Debt [Line Items]    
Short term debt 730 665
Austrian [Member] | Loans Due Through March 2020 and other debt [Member]    
Short-term Debt [Line Items]    
Short term debt $ 0 $ 597