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Accrued Expenses and Other Payables (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Payables and Accruals [Abstract]    
Engineering accruals $ 807 $ 862
Professional fees 642 622
Government grants 288 201
Income taxes payable, net 830 739
Other 1,066 1,369
Accrued expenses and other payables $ 3,633 $ 3,793