Note 8 - Oil and Gas Leases (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	2018		2017
Gross revenues
Royalty interests	$	4,487	$	588,121
Lease fees		576,976		21,001
		581,463		609,122
Production costs		63,231		62,315
Results before income tax expense		518,232		546,807
Estimated income tax expense		150,287		169,510
Results of operations from producing activities excluding corporate overhead	$	367,945	$	377,297

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

	2018		2017
Net gas produced (MCF)		25,776		42,927
Net oil produced (Bbl)		6,956		8,169