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Consolidated Statements of Shareholders' Equity - USD ($)
Total
Common Stock [Member]
Capital in Excess of Par Value [Member]
Retained Earnings [Member]
Common Stock [Member]
Common Stock [Member]
Class B Stock [Member]
Common Stock [Member]
Beginning balance at Sep. 30, 2022 $ 166,917,000   $ 12,590,000 $ 152,861,000 $ 1,234,000 $ 232,000
Beginning balance, shares at Sep. 30, 2022         12,338,845 2,318,857
Net Income (Loss) 14,666,000 $ 14,666,000   14,666,000    
Ending balance at Sep. 30, 2023 181,583,000   12,590,000 167,527,000 $ 1,234,000 $ 232,000
Ending balance, shares at Sep. 30, 2023         12,338,845 2,318,857
Net Income (Loss) 14,558,000 $ 14,558,000   14,558,000    
Ending balance at Sep. 30, 2024 $ 196,141,000   $ 12,590,000 $ 182,085,000 $ 1,234,000 $ 232,000
Ending balance, shares at Sep. 30, 2024         12,338,845 2,318,857