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Note 6 - Segment Reporting - Segmented Operations Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Revenues, Total	$ 153,475	$ 346,695
Total costs, expenses and (gains)	64,115	(701,286)
Income from operations	89,360	1,047,981
Income before income Taxes	115,884	1,060,903
Total assets	15,685,155			$ 15,602,001
Capital Expenditures	17,970		$ 55,438
Depreciation, Depletion and Amortization, Total	616	8,735
Oil and Gas [Member]
Revenues from customers	94,228	124,577
Timber [Member]
Revenues from customers	14,481	178,449
Operating Segments [Member]
Revenues, Total	153,475	346,695
Total costs, expenses and (gains)	19,499	44,240
Income from operations	133,976	302,455
Other income (expense) before income taxes	(18,092)	758,448
Income before income Taxes	115,884	1,060,903
Total assets	15,685,155		15,602,001
Depreciation, Depletion and Amortization, Total	616		3,885
Operating Segments [Member] | Oil And Gas Segment [Member]
Total costs, expenses and (gains)	14,524	16,656
Income from operations	79,704	107,921
Depreciation, Depletion and Amortization, Total			1,858
Operating Segments [Member] | Oil And Gas Segment [Member] | Oil and Gas [Member]
Revenues from customers	94,228	124,577
Operating Segments [Member] | Timber Segment [Member]
Total costs, expenses and (gains)	4,397	20,594
Income from operations	10,084	157,855
Total assets	2,180,251		2,162,390
Capital Expenditures	17,970		45,067
Depreciation, Depletion and Amortization, Total	109
Operating Segments [Member] | Timber Segment [Member] | Timber [Member]
Revenues from customers	14,481	178,449
Operating Segments [Member] | Corporate Segment [Member]
Total assets	13,504,904		13,439,611
Capital Expenditures			5,471
Depreciation, Depletion and Amortization, Total	507		2,027
Operating Segments [Member] | Surface Segment [Member]
Revenues, leases	44,766	43,669
Total costs, expenses and (gains)	578	6,990
Income from operations	44,188	$ 36,679
Capital Expenditures			$ 4,900

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