Quarterly report pursuant to Section 13 or 15(d)

Inventories - Summary of Inventories (Detail)

v3.21.2
Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Supplies $ 6,383 $ 5,010
Raw materials 3,536 7,047
Work in process 10,532 5,710
Finished goods 9,533 7,684
Total $ 29,984 $ 25,451