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Note 2 - Company's Royalty and Working Interests Share (Details) - Boe	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Natural Gas, Per Thousand Cubic Feet [Member]
Net oil or gas produced	50,304	46,457
Crude Oil and NGL [Member]
Net oil or gas produced	11,145	10,593

X

- Definition

Energy measure of oil and natural gas production reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1204

+ Details

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- Details

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- Details

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