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Derivatives (Summary Of Derivative Contracts) (Details) - USD ($)
Jun. 30, 2020
Sep. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]    
Gross amounts recognized - Current Assets [1] $ 2,028,640 $ 2,256,639
Offsetting adjustments - Current Assets [1] (208,663)  
Derivative contracts, net [1] 1,819,977 2,256,639
Gross amounts recognized - Non-Current Assets [1] 57,386 237,505
Offsetting adjustments - Non-Current Assets [1] (57,386)  
Derivative contracts, net [1]   $ 237,505
Gross amounts recognized - Current Liabilities [1] 208,663  
Offsetting adjustments - Current Liabilities [1] (208,663)  
Gross amounts recognized - Non-Current Liabilities [1] 197,852  
Offsetting adjustments - Non-Current Liabilities [1] (57,386)  
Derivative contracts, net [1] $ 140,466  
[1] See Note 11: Fair Value Measurements for further disclosures regarding fair value of financial instruments.