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Debt - Schedule of Short Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Short-term Debt [Line Items]    
Short term debt $ 2,972 $ 10,993
Short term debt   6,282
Short term debt 2,972 10,993
Other Debt [Member]    
Short-term Debt [Line Items]    
Short term debt 7 8
Japan [Member] | Line of Credit [Member]    
Short-term Debt [Line Items]    
Short term debt 2,750 4,245
Japan [Member] | Receivables Financing Facility [Member]    
Short-term Debt [Line Items]    
Short term debt $ 215 $ 458