Note 1 - Nature of Business and Significant Accounting Policies (Details Textual)	12 Months Ended
Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Aug. 27, 2020 a
Equity Securities, FV-NI, Current	$ 502,832	$ 502,595
Accounts Receivable, Allowance for Credit Loss, Current	0
Impairment of Long-Lived Assets Held-for-use	0	0
Accrued Royalty Income	50,379	49,113
Deposit Assets, Stumpage Agreements	0	87,300
Dilutive Securities, Effect on Basic Earnings Per Share, Total	0	0
Payments of Ordinary Dividends, Common Stock	0	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	0	0
Taxes, Other	146,095	125,124
Oil and Gas [Member]
Capitalized Contract Cost, Net, Total	0	0
Southwest Louisiana [Member]
Area of Land (Acre) \| a			13,941
Southwest Louisiana [Member] \| Timber Properties [Member]
Area of Land (Acre) \| a			10,495
Mutual Fund [Member]
Equity Securities, FV-NI, Current	$ 502,832	$ 502,595

Represents the amount of accrued royalty income.

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The amount of stumpage agreements held as deposit assets.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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Area of land held.

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Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

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Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount of tax expense classified as other.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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