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Inventories - Components of Inventories (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Jun. 30, 2020
Inventory Disclosure [Abstract]    
Materials, purchased parts and supplies $ 50,120 $ 36,692
Work in process 11,307 10,867
Finished goods 16,491 17,608
Total $ 77,918 $ 65,167