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Note 12 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Statutory federal expense rate 21.00% 21.00%
Share-based compensation (2.30%) (10.50%)
Section 162(m) of the Code executive compensation deduction limitations 2.30% 0.20%
Net interest and penalties related to uncertain tax positions and unpaid tax liabilities 0.10% 0.10%
Interest expense on preferred stock classified as debt for tax purposes (2.60%) (2.30%)
Foreign taxes (0.20%) (0.20%)
State taxes, net of federal tax benefit 3.90% 2.70%
Valuation allowances changes affecting the provision for income taxes (1.50%) (1.30%)
Prior year provision to return reconciling items, tax effects of non-controlling interests, and other (0.40%) (0.10%)
Global intangible low-taxed income tax 0.30% 0.20%
Effective tax expense rate 20.60% 9.80%