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Note 5 - Property and Equipment (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (Loss) on Disposition of Oil and Gas and Timber Property, Total	$ 4,950	$ 3,334	$ 80,876	$ 881,654
Depreciation, Total	$ 504	$ 234	1,011	467
Depletion, Total			109	14,713
Land [Member]
Gain (Loss) on Disposition of Oil and Gas and Timber Property, Total			$ 80,876	881,654
Land [Member] | Partially Owned Properties [Member]
Gain (Loss) on Disposition of Oil and Gas and Timber Property, Total				$ 767,147
Investment Owned, Percent of Net Assets		6.25%		6.25%

X

- Definition

The noncash expense charged against earnings to recognize the consumption of natural resources.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of gain (loss) on sale or disposal of oil and gas property or timber property.

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Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

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