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Employee Benefit - Summary of Employee Benefit Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Net Defined Benefit Liability Asset [Abstract]    
Pension-Defined benefit plans, current $ 1,436 $ 855
Long service leave, current 452 427
Employee benefit liabilities, current 1,888 1,282
Pension-Defined benefit plans, non-current 10,306 8,161
Long service leave, non-current 128 112
Employee benefit liabilities, non-current 10,434 8,273
Pension-Defined benefit plans 11,742 9,016
Long service leave 580 539
Employee benefit liabilities $ 12,322 $ 9,555