Annual report pursuant to Section 13 and 15(d)

Note 6 - Income Taxes (Details Textual)

v3.24.3
Note 6 - Income Taxes (Details Textual) - USD ($)
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Unrecognized Tax Benefits, Interest on Income Taxes Expense $ 0 $ 0
Domestic Tax Jurisdiction [Member]    
Accrued Income Taxes, Current $ 30,000  
Operating Loss Carryforwards   0
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]    
Open Tax Year 2019 2020 2021 2022 2023 2024  
Foreign Tax Jurisdiction, Other [Member]    
Income Taxes Receivable $ 5,000  
Foreign Tax Jurisdiction, Other [Member] | Finnish Tax Administration [Member]    
Operating Loss Carryforwards   1,000
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards $ 64,000 0
Open Tax Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024  
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]    
Tax Credit Carryforward, Amount $ 370,000 $ 255,000
State and Local Jurisdiction [Member] | Research and Development and Alternative Minimum Tax Credit Carryforwards [Member]    
Deferred Tax Assets, Valuation Allowance 0  
Foreign Tax Jurisdiction [Member] | Finnish Tax Administration [Member]    
Operating Loss Carryforwards $ 1,851,000  
Foreign Tax Jurisdiction [Member] | Ministry of Finance Finland [Member] | Nestor Cables [Member]    
Open Tax Year 2020 2021 2022 2023 2024