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Note 12 - Income Taxes (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  | 21.00% | 21.00%
Effective Income Tax Rate Reconciliation, Percent |  | 25.00% | (8.00%) | 25.00% | 4.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent |  |  |  | 5.00% | 3.00%
Effective Income Tax Rate Reconciliation, Deduction, Percent |  |  |  | 1.00% |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent |  |  |  | 2.00% |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent |  |  |  |  | 7.00%
Effective Income Tax Rate Reconciliation, Discrete Item, Percent |  |  | 13.00% |  | 13.00%
Income Taxes Paid, Net |  |  |  | $ 130 |
State and Local Jurisdiction [Member] |  |  |  |  |
Operating Loss Carryforwards |  | $ 282 |  | 282 |
Operating Loss Carryforwards That Will Not Be Realized |  | $ 201 |  | $ 201 |
Forecast [Member] | Minimum [Member] |  |  |  |  |
Income Taxes Paid, Net | $ 3 |  |  |  |

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