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Note 3 - Oil and Gas Leases (Detail) - Company’s royalty and working interests share of oil and gas, exclusive of plant products, products from leased properties:	12 Months Ended
	Dec. 31, 2012 Boe	Dec. 31, 2011 Boe
Natural Gas, Per Thousand Cubic Feet [Member]
Net production	92,470	70,105
Crude Oil and NGL [Member]
Net production	19,543	9,801

X

- Definition

This element represents the number of barrel of oil equivalents (BOE) which is a measurement used by oil and gas companies as a way of combining oil and natural gas reserves and production into a single measurement. Natural gas volumes are converted to BOE based on the energy content of 6,000 cubic feet of gas to one barrel of oil.

+ References

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

-Publisher SEC

-Name Industry Guide

-Number 2

-Paragraph 3

-Subparagraph A

+ Details

Name:	us-gaap_ProductionBarrelsOfOilEquivalents
Namespace Prefix:	us-gaap_
Data Type:	us-types:boeItemType
Balance Type:	na
Period Type:	duration