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Other Assets - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015 | Apr. 30, 2016
Line of Credit Facility [Line Items] |  |  |  |
Unamortized debt issuance costs | $ 98,468 |  |  |
Revolving Credit Facility | Texas Capital Bank, N.A. |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Unamortized debt issuance costs |  |  |  | $ 179,468
Revolving Credit Facility | Delhi Field | Texas Capital Bank, N.A. |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Deferred legal fees |  | $ 50,414 |  |
Costs incurred for title work related to the Dehli Field |  | 107,196 |  |
Line of Credit | Senior Secured Reserve-Based Credit Facility |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Unamortized debt issuance costs |  |  |  | $ 168,972
Debt issuance costs amortized | $ 56,541 | $ 46,374 | $ 48,636 |

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