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Concentrations of Credit Risk - Schedule of Credit Risk (Details) - Net revenue - Major Customers	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Concentrations of Credit Risk
Percent of Total Revenue	100.00%	100.00%
Plains Marketing L.P. (Delhi field oil)
Concentrations of Credit Risk
Percent of Total Revenue	87.00%	94.00%
Merit Energy Company (Hamilton Dome field oil)
Concentrations of Credit Risk
Percent of Total Revenue	10.00%	0.00%
Third Coast Midstream (Delhi field NGLs)
Concentrations of Credit Risk
Percent of Total Revenue	3.00%	6.00%

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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