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Concentrations of Credit Risk (Tables)
 12 Months Ended
Jun. 30, 2021
Risks and Uncertainties [Abstract]  
Schedule of customers from whom the entity derived 10 percent or more of net oil and natural gas revenues The following table identifies customers from whom we derived 10 percent or more of our net oil and natural gas revenues during the years ended June 30, 2021 and 2020. The loss of either one of our oil purchasers or disruption to their respective pipelines could adversely affect our net realized pricing and potentially our near-term production levels. The loss of our NGL purchaser, who trucks NGLs from the field, would not be expected to have a material adverse effect on our operations.
 Year Ended June 30,
Customer20212020
Plains Marketing L.P. (Delhi field oil)62 %87 %
Merit Energy Company (Hamilton Dome field oil)19 %10 %
All others19 %3 %
Total100 %100 %