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Note 8 - Income Tax Provision (Details Textual) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Effective Income Tax Rate Reconciliation, Percent 22.20% 14.00% 28.80%
Deferred Tax Assets, Valuation Allowance $ 309   $ 309