Other noncurrent liabilities - Summary of Other Noncurrent Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Other noncurrent liabilities
Reserve for uncertain tax positions	$ 1,515	$ 1,724
OPEB	699	787
Insurance claims and expenses	617	632
Other	364	347
Total	$ 3,195	$ 3,490