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Commitments and Contingencies - Narrative (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2015 USD ($) senior_executive | Jun. 30, 2014 USD ($) | Jun. 30, 2013 USD ($) | Feb. 26, 2015 USD ($) | Jan. 26, 2015
Loss Contingencies [Line Items] |  |  |  |  |
Overriding royalty interest in the Delhi Unit | 4.8119% |  |  |  |
Rent expense | $ 175,103 | $ 174,229 | $ 147,233 |  |
Employment Contracts |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of senior executives under agreement | senior_executive | 2 |  |  |  |
Total contingent obligations | $ 473,000 |  |  |  |
Minimum | Employment Contracts |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Period of benefits to employee after termination | 6 months |  |  |  |
Maximum | Employment Contracts |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Period of benefits to employee after termination | 1 year |  |  |  |
Denbury Resources, Inc |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Suspended overriding royalty revenue interest |  |  |  |  | 2.89155%
Suspended overriding royalty interest, amount previously suspended |  |  |  | $ 712,000 |

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