DEBT - Long-Term Debt (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jun. 30, 2023	Sep. 30, 2022
Long-term obligations
Long-term debt	$ 14,968,010	$ 8,979,569
Less current maturities	(2,738,524)	(1,595,309)
Long-term debt less current maturities	12,229,486	7,384,260
4.50% Unsecured Note Payable
Long-term obligations
Long-term debt	$ 852,642	$ 968,589
Fixed interest rate (as a percent)	4.50%	4.50%
Periodic installments of principal and interest	$ 49,114	$ 49,114
4.10% Note Payable
Long-term obligations
Long-term debt	$ 5,280,076	$ 5,572,766
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	$ 1,927,167	$ 2,052,327
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	312,040	385,887
Periodic installments of principal and interest	$ 7,934	$ 7,934
Variable rate	7.28%
6.04% Note Payable
Long-term obligations
Long-term debt	$ 6,596,085
Fixed interest rate (as a percent)	6.04%
Periodic installments of principal and interest	$ 135,469