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DEBT - Long-Term Debt (Details) - USD ($)
 9 Months Ended 12 Months Ended
Jun. 30, 2024
Sep. 30, 2023
Long-term obligations    
Long-term debt $ 23,252,505 $ 13,630,504
Less current maturities (5,335,127) (1,955,065)
Long-term debt less current maturities 17,917,378 11,675,439
4.10% Note Payable    
Long-term obligations    
Long-term debt $ 4,849,552 $ 5,174,188
Fixed interest rate (as a percent) 4.10% 4.10%
Periodic installments of principal and interest $ 53,361 $ 53,361
3.25% Note Payable    
Long-term obligations    
Long-term debt $ 1,783,307 $ 1,891,638
Fixed interest rate (as a percent) 3.25% 3.25%
Periodic installments of principal and interest $ 17,016 $ 17,016
7.28% Note payable    
Long-term obligations    
Long-term debt 216,827 288,237
Periodic installments of principal and interest $ 7,934 $ 7,934
Variable rate 7.28% 7.28%
6.04% Note Payable    
Long-term obligations    
Long-term debt $ 5,120,560 $ 6,276,441
Fixed interest rate (as a percent) 6.04% 6.04%
Periodic installments of principal and interest $ 130,036 $ 130,036
5.50% Unsecured Note Payable    
Long-term obligations    
Long-term debt $ 7,382,259  
Fixed interest rate (as a percent) 5.50%  
Periodic installments of principal and interest $ 727,741  
5.75% Unsecured Note Payable    
Long-term obligations    
Long-term debt $ 3,900,000  
Fixed interest rate (as a percent) 5.75%  
Periodic installments of principal and interest $ 225,761