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Note 8 - Fair Value - Summary of the Fair Value of Financial Assets and Liabilities Not Adjusted to Fair Value (Details) - USD ($)
Sep. 30, 2025
Sep. 30, 2024
Current maturities of long-term debt $ 2,846,018 $ 800,000
Reported Value Measurement [Member]    
Current maturities of long-term debt 2,846,018 800,000
Notes payable 134,258,197 136,955,000
Total Liabilities fair value 137,104,215 137,755,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Current maturities of long-term debt 0 0
Notes payable 0 0
Total Liabilities fair value 0 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Current maturities of long-term debt 0 0
Notes payable 0 0
Total Liabilities fair value 0 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Current maturities of long-term debt 2,846,018 800,000
Notes payable 131,605,756 135,471,275
Total Liabilities fair value $ 134,451,774 $ 136,271,275