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Asset Retirement Obligations (Tables) | 6 Months Ended
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Dec. 31, 2015
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of reconciliations of the beginning and ending asset retirement obligation balances | The following is a reconciliation of the beginning and ending asset retirement obligations for the six months ended December 31, 2015, and for the year ended June 30, 2015:
| December 31, 2015 |  | June 30, 2015
Asset retirement obligations — beginning of period | $ | 772,990 |  |  | $ | 352,215 |
Liabilities incurred (a) | — |  |  | 564,019 |
Liabilities settled | — |  |  | (137,604 | )
Liabilities sold | — |  |  | (52,526 | )
Accretion of discount | 22,860 |  |  | 34,866 |
Revision of previous estimates | — |  |  | 12,020 |
Asset retirement obligations — end of period | $ | 795,850 |  |  | $ | 772,990 |
Less current portion in accrued liabilities | (102,874 | ) |  | (57,223 | )
Long-term portion of asset retirement obligations | 692,976 |  |  | 715,767 |
(a) Liabilities incurred during fiscal 2015 relate to our share of the the estimated abandonment costs of the wells and facilities in the Delhi field subsequent to the reversion of our working interest.

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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