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Summary Of Significant Accounting Policies (Summary Of Reconciliation Of Derivative Contracts Classified As Level 3 Measurements) (Details)
12 Months Ended
Sep. 30, 2016
USD ($)
Accounting Policies [Abstract]  
Net Asset (Liability) Balance of Level 3 as of October 1, 2015 $ 1,891,249
Total gains or (losses) included in earnings (4,200,367)
Purchases, issuances and settlements 1,992,460
Net Asset (Liability) Balance of Level 3 as of September 30, 2016 $ (316,658)