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Note 7 - Income Taxes (Details Textual) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred Tax Assets, Valuation Allowance, Total | $ 235,000 | $ 303,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Total | 12,100,000 |
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Noncurrent | 9,100,000 |
Domestic Tax Authority [Member] |  |
Deferred Tax Assets, Valuation Allowance, Total | 0 |
Operating Loss Carryforwards | 197,000 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards, Subject to Expiration | 438,000 |
Foreign Tax Authority [Member] |  |
Operating Loss Carryforwards | $ 1,400,000 |

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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI https://asc.fasb.org/topic&trid=2144680 + Details
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- Definition Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI https://asc.fasb.org/topic&trid=2144680 + Details
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