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Note 5 - Segment Reporting - Segmented Operations Information (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Revenues, Total $ 188,697 $ 216,808 $ 369,088 $ 370,283  
Total costs, expenses and (gains) (15,395) 218,433 109,041 282,548  
Income from operations 204,092 (1,625) 260,047 87,735  
Income before income Taxes 234,473 27,862 308,303 143,746  
Total assets 16,244,083   16,244,083   $ 15,862,530
Capital Expenditures       26,815
Oil and Gas [Member]          
Revenues from customers 67,929 143,036 182,979 233,932  
Timber [Member]          
Revenues from customers 3,747 11,635 14,481  
Operating Segments [Member]          
Revenues, Total 188,697 216,808 369,088 370,283  
Total costs, expenses and (gains) 12,084 14,445 26,272 33,944  
Income from operations 176,613 202,363 342,816 336,339  
Other income (expense) before income taxes 57,860 (174,501) (34,513) (192,593)  
Income before income Taxes 234,473 27,862 308,303 143,746  
Total assets 16,244,083   16,244,083   15,862,530
Depreciation and Depletion     651   2,362
Operating Segments [Member] | Oil And Gas Segment [Member]          
Total costs, expenses and (gains) 11,072 13,643 22,809 28,167  
Income from operations 56,857 129,393 160,170 205,765  
Depreciation and Depletion      
Operating Segments [Member] | Oil And Gas Segment [Member] | Oil and Gas [Member]          
Revenues from customers 67,929 143,036 182,979 233,932  
Operating Segments [Member] | Timber Segment [Member]          
Total costs, expenses and (gains) 754 687 3,205 5,084  
Income from operations 2,993 (687) 8,430 9,397  
Total assets 2,188,409   2,188,409   2,188,594
Capital Expenditures       26,815
Depreciation and Depletion     184   611
Operating Segments [Member] | Timber Segment [Member] | Timber [Member]          
Revenues from customers 3,747 11,635 14,481  
Operating Segments [Member] | Corporate Segment [Member]          
Total assets 14,055,674   14,055,674   13,673,936
Capital Expenditures      
Depreciation and Depletion     467   1,751
Operating Segments [Member] | Surface Segment [Member]          
Operating Leases, Income Statement, Lease Revenue, Total 117,021 73,772 174,474 121,870  
Total costs, expenses and (gains) 258 115 258 693  
Income from operations $ 116,763 $ 73,657 174,216 $ 121,177  
Capital Expenditures