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Inventories - Net Inventories (Detail) - USD ($)
Dec. 31, 2022
Sep. 30, 2022
Inventory, Net [Abstract]    
Raw materials $ 35,085,000 $ 31,975,000
Work in process 14,545,000 13,903,000
Finished goods 9,685,000 9,937,000
Inventories, net $ 59,315,000 $ 55,815,000