v3.25.1
Note 9 - Income Taxes (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Income Tax Expense (Benefit) $ 16,600,000 $ 5,205,000 $ 20,600,000 $ 8,330,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest $ 61,270,000 $ 20,620,000 76,165,000 36,360,000
Effective Income Tax Rate Reconciliation, Unrealized Gains (Losses) on Marketable Securities, Amount     19,155,000 5,180,000
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount     35,000 40,000
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount     910,000 480,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount     640,000 210,000
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount     $ 140,000 $ 820,000
Effective Income Tax Rate Reconciliation, Percent     27.00% 22.90%
Effective Income Tax Rate Reconciliation, Realized Gains on Marketable Securities, Amount       $ 3,660,000