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Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 226	$ 226
Open Tax Year	2018 2019 2020 2021
Liability for Uncertainty in Income Taxes, Current	$ 0	0
Income Tax Examination, Penalties and Interest Accrued, Total	0	0
Unrecognized Tax Benefits, Ending Balance	0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	0	$ 0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	396
Operating Loss Carryforwards, Valuation Allowance, Total	$ 396

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards.

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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Amount recognized for uncertainty in income taxes classified as current.

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