Summary Of Significant Accounting Policies (Summary Of Impairments Associated With Certain Assets Measured At Fair Value On A Nonrecurring Basis Within Level 3) (Details) - USD ($) |
12 Months Ended | ||||||
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Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
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Accounting Policies [Abstract] | |||||||
Producing Properties, Fair Value | [1] | $ 9,101,032 | $ 567,077 | ||||
Provision for impairment | $ 76,824,337 | [1] | $ 0 | $ 662,990 | [1] | ||
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