Summary Capitalized Costs of Oil Properties (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items]
Unevaluated properties not subject to amortization	$ 7,830,828	$ 7,922,734
Properties subject to amortization	30,466,951	21,602,640
Capitalized costs	38,297,779	29,525,374
Accumulated depletion	(5,094,881)	(3,764,874)
Net capitalized costs	$ 33,202,898	$ 25,760,500

Oil and natural gas properties cost method subject to amortization.

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- Definition

Oil and natural gas properties-full cost method, not subject to amortization

+ References

No definition available.

+ Details

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- Definition

Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 19

-Paragraph 59M

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation.

+ References

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Net amount of capitalized costs relating to oil and gas producing activities.

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