XML 64 R53.htm IDEA: XBRL DOCUMENT v3.25.2
Note 9 - Fair Value Measurements - Schedule of Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)
Jun. 30, 2025
Sep. 30, 2024
Total Assets fair value $ 1,535,068 $ 2,062,551
Natural gas purchases 775,477 761,020
Total Liabilities fair value 775,477 761,020
Fair Value, Inputs, Level 1 [Member]    
Interest rate swaps, assets   0
Total Assets fair value 0 0
Natural gas purchases 0 0
Total Liabilities fair value 0 0
Fair Value, Inputs, Level 2 [Member]    
Total Assets fair value 1,535,068 2,062,551
Natural gas purchases 775,477 761,020
Total Liabilities fair value 775,477 761,020
Fair Value, Inputs, Level 3 [Member]    
Total Assets fair value 0 0
Natural gas purchases 0 0
Total Liabilities fair value 0 0
Interest Rate Swap [Member]    
Interest rate swaps, assets 1,535,068 2,062,551
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]    
Interest rate swaps, assets 0  
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]    
Interest rate swaps, assets 1,535,068 2,062,551
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]    
Interest rate swaps, assets $ 0 $ 0