Notes Payable (NPI Agreement) - Additional Information (Detail) - Net Profits Interest Agreement [Member] - USD ($)	3 Months Ended
Mar. 31, 2015	Jun. 30, 2014
Debt Instrument [Line Items]
Percentage of net profit related to NPI	6.50%
Percentage of net profit for subsequent borrowing	2.50%
Percentage of NPI earned	1.00%
Minimum [Member]
Debt Instrument [Line Items]
Minimum amount of NPI earned	$ 1,500,000
Morgan Stanley [Member]
Debt Instrument [Line Items]
Discount related to NPI		$ 4,072,410
Accretion of discount related to the NPI	$ 222,131
Morgan Stanley [Member] \| Proved Property [Member]
Debt Instrument [Line Items]
Discount related to NPI		3,339,376
Morgan Stanley [Member] \| Unproved Property [Member]
Debt Instrument [Line Items]
Discount related to NPI		$ 733,034

Net Profits Interest

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- Definition

Net Profits Interest Percent

+ References

No definition available.

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- Definition

Percentage Of Net Profit

+ References

No definition available.

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- Definition

Percentage Of Net Profit For Subsequent Borrowing

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 35

-Subparagraph (h)

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- Definition

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.

+ References

No definition available.

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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