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Other Current Liability - Summary of Other Current Liability (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Miscellaneous Current Liabilities [Abstract]      
Liabilities arising from contracts with customers $ 756    
Dividend payable 565 $ 524  
Deferred government grant 318    
Onerous contracts provisions 42 555 $ 250
Other current liabilities 1,591 1,563  
Total $ 3,272 $ 2,642