XML 40 R27.htm IDEA: XBRL DOCUMENT v3.24.4
Note 3 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Income Tax Expense (Benefit) $ 26,165,000 $ 6,650,000  
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 104,278,000 28,102,000  
Effective Income Tax Rate Reconciliation, Realized Gains on Marketable Securities, Amount 24,534,000 4,250,000  
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount 2,175,000 2,803,000  
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount $ 544,000 $ 403,000  
Effective Income Tax Rate Reconciliation, Percent 25.10% 23.70%  
Income Tax Expense (Benefit) $ 26,165,000 $ 6,650,000  
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest $ 104,278,000 $ 28,102,000  
Domestic Tax Jurisdiction [Member]      
Open Tax Year 2020 2021 2022 2023 2024    
State and Local Jurisdiction [Member]      
Open Tax Year 2019 2020 2021 2022 2023 2024    
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]      
Operating Loss Carryforwards Utilized     $ 4,200,000
Operating Loss Carryforwards     5,500,000
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Operating Loss Carryforwards, Expire Fiscal Years 2038 and 2039 [Member]      
Operating Loss Carryforwards     $ 1,300,000