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Note 6 - Income Taxes (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Effective Income Tax Rate Reconciliation, Percent, Total 16.00% 26.00% 15.00% 23.00%