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Note 10 - Income Taxes - Income Tax Benefit (Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
State income tax $ 39 $ 51
Deferred tax expense - federal 9 30
Deferred tax expense (benefit) – state 35 (2)
Tax expense $ 83 $ 79