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Property, Plant And Equipment - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Property Plant And Equipment [Abstract]        
Depreciation expense related to property, plant and equipment $ 1,839 $ 1,577 $ 3,356 $ 3,225
Elimination of Assets and Accumulated depreciation $ 283 $ 0 $ 396 $ 710