Note 6 - Income Taxes (Details Textual) - USD ($) |
12 Months Ended | 24 Months Ended | ||
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Sep. 30, 2023 |
Sep. 30, 2023 |
Sep. 30, 2022 |
Sep. 30, 2021 |
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Accrued Income Taxes, Current | $ 84,000 | $ 84,000 | $ 1,791,000 | |
Domestic Tax Authority [Member] | ||||
Operating Loss Carryforwards | 0 | $ 0 | 0 | |
Open Tax Year | 2017 2018 2019 2020 2021 2022 2023 | |||
Foreign Tax Authority [Member] | Finnish Tax Administration [Member] | ||||
Operating Loss Carryforwards | $ 1,000 | $ 1,000 | 4,000 | |
Foreign Tax Authority [Member] | Finnish Tax Administration [Member] | Nestor Cables [Member] | ||||
Open Tax Year | 2018 2019 2020 2021 2022 2023 | |||
State and Local Jurisdiction [Member] | ||||
Open Tax Year | 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 | |||
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | ||||
Tax Credit Carryforward, Amount | $ 255,000 | $ 255,000 | $ 292,000 | |
State and Local Jurisdiction [Member] | Research and Development and Alternative Minimum Tax Credit Carryforwards [Member] | ||||
Deferred Tax Assets, Valuation Allowance | $ 0 |
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- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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