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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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Costs Incurred, Oil and Gas Properties, Title Work

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Deferred Legal Fees

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Amount of amortization expense attributable to debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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-Name Accounting Standards Codification
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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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-Name Accounting Standards Codification
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