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Selected Account Information - Components of Other Charges (Gains) (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Selected Account Information [Abstract]        
Impairment of assets $ 0 $ 1,401,000 $ 0 $ 1,401,000
Settlement of lawsuits 385,000 1,000 577,000 153,000
Loss (gain) on disposal of businesses and assets (58,000) 91,000 (400,000) 86,000
Gain on insurance (320,000) (12,000) (321,000) (209,000)
Other charges (gains), net $ 7,000 $ 1,481,000 $ (144,000) $ 1,431,000