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Note 11 - Income Taxes (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2020 | Dec. 31, 2023
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |  |
Effective Income Tax Rate Reconciliation, Percent | 26.00% | 25.00% |  |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 5.00% | 4.00% |  |
Proceeds from Income Tax Refunds |  |  | $ 21 |
State and Local Jurisdiction [Member] |  |  |  |
Operating Loss Carryforwards |  |  |  | $ 344
Operating Loss Carryforwards That Will Not Be Realized |  |  |  | $ 217
Minimum [Member] |  |  |  |
Income Taxes Paid, Net | $ 35 |  |  |
Maximum [Member] |  |  |  |
Income Taxes Paid, Net | $ 45 |  |  |

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