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Note 7 - Income Taxes - Changes in Uncertain Tax Positions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Balance at the beginning of the period $ 89,644 $ 88,137
Additions based on tax positions related to current period 4,292 3,042
Additions for tax positions of prior year period 2,108 2,125
Additions in relation to the Coretrax Acquisition 9,848 0
Settlements with tax authorities (71) (1,945)
Reductions for tax positions of prior years (30,357) (714)
Reductions due to the lapse of statute of limitations (42) (976)
Effect of changes in foreign exchange rates (896) (25)
Balance at the end of the period $ 74,526 $ 89,644