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Summary Of Significant Accounting Policies (Summary Of Unobservable Inputs For Level 3 Fair Value Measurements) (Details)
12 Months Ended
Sep. 30, 2017
USD ($)
Oil Costless Collars [Member]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Unobservable Input Oil price volatility curve
Weighted Average 14.98%
Fair Value Assets (Liabilities) $ (60,331)
Oil Costless Collars [Member] | Minimum [Member]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Range 0.00%
Oil Costless Collars [Member] | Maximum [Member]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Range 29.06%
Natural Gas Costless Collars [Member]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Unobservable Input Gas price volatility curve
Weighted Average 18.13%
Fair Value Assets (Liabilities) $ 211,884
Natural Gas Costless Collars [Member] | Minimum [Member]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Range 0.00%
Natural Gas Costless Collars [Member] | Maximum [Member]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Range 29.34%