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Summary Capitalized Costs of Oil Properties (Detail) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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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

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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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 59M -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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