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Note 7 - Income Taxes (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jan. 01, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 24.50% 22.70% 23.70% 24.00%
Unrecognized Tax Benefits, Ending Balance   $ 87.8   $ 87.8
Unrecognized Tax Benefits that Would Impact Effective Tax Rate   74.5   74.5
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total   $ 9.0   $ 9.0