Annual report pursuant to Section 13 and 15(d)

Inventories - Narrative (Details)

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Inventories - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 31, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Inventory [Line Items]        
Proceeds from federal relief grants   $ 4,299,000 $ 4,629,000 $ 15,597,000
Insurance expenses incurred   $ 2,000,000,000    
Insurance Reimbursement Received $ 1,000,000,000      
Year-End Adjustment        
Inventory [Line Items]        
Inventory casualty loss       $ 808,000