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Note 2 - Oil and Gas Leases (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block]

		2017				2016
Gross revenues
Royalty interests		$	588,121			$	488,947
Lease fees			21,001				21,909
			609,122				510,856
Production costs			62,315				47,212
Results before income tax expense			546,807				463,644
Estimated income tax expense			169,510				97,365
Results of operations from producing activities excluding corporate overhead		$	377,297			$	366,279

Oil and Gas Net Production, Average Sales Price and Average Production Costs Disclosure [Table Text Block]

		2017				2016
Net gas produced (MCF)			42,927				48,758
Net oil produced (Bbl)			8,169				8,412

X

- Definition

Tabular disclosure of oil and gas production including quantitative production data, average price, and per unit cost data.

+ References

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-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1204

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