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Inventory (Tables)
9 Months Ended
Jun. 30, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of the following components:
June 30,September 30,
20232022
Raw materials$14,387 $12,504 
Work in process12,010 8,218 
Finished goods2,748 2,129 
Parts and supplies73,449 73,482 
Total inventories$102,594 $96,333