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Supplemental Disclosures about Oil and Natural Gas Producing Properties (unaudited) - Narrative (Details) - USD ($)		12 Months Ended
	Jun. 24, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Reserve Quantities [Line Items]
Oil and natural gas property costs attributable to the recognition of asset retirement obligations		$ 43,922	$ 471,864	$ 140,151
Fair value of litigation settlement		$ 0	$ 0	$ 596,500
Period Considered for Unweighted Arithmetic Average for Determining Reserve Volumes and Values		12 months
Period Considered for Determining Unweighted Arithmetic Average of First Day of Month, Commodity Prices		12 months
Dehli Field Litigation | Denbury Resources, Inc
Reserve Quantities [Line Items]
Working interest in Mengal Sand Interval	23.90%
Fair value of litigation settlement	$ 596,500

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- Definition

Amount of asset retirement obligations incurred during the period, net of certain increases or decreases in the amount of the asset retirement obligation during the current period that may include changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

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