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Derivatives (Summary Of Derivative Contracts) (Details) - USD ($)
Jun. 30, 2021
Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]    
Gross amounts recognized - Current Assets [1] $ 130,690 $ 864,466
Offsetting adjustments - Current Assets [1] (130,690) (864,466)
Gross amounts recognized - Non-Current Assets [1] 144,462  
Offsetting adjustments - Non-Current Assets [1] (144,462)  
Gross amounts recognized - Current Liabilities [1] 6,885,018 1,146,408
Offsetting adjustments - Current Liabilities [1] (130,690) (864,466)
Derivative contracts, net [1] 6,754,328 281,942
Gross amounts recognized - Non-Current Liabilities [1] 1,498,636 425,705
Offsetting adjustments - Non-Current Liabilities [1] (144,462)  
Derivative contracts, net [1] $ 1,354,174 $ 425,705
[1] See Note 10: Fair Value Measurements for further disclosures regarding fair value of financial instruments.