Other Noncurrent Assets, Net - Summary of Other Noncurrent Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Restricted cash	$ 721	$ 1,003
Pension asset	1,970	1,898
Other	1,224	1,210
Total	$ 3,915	$ 4,111