Note 7 - Income Taxes (Details Textual) - USD ($) |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Deferred Tax Assets, Valuation Allowance, Total | $ 303,000 | $ 340,000 |
| Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Total | 13,700,000 | |
| Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Noncurrent | 12,100,000 | |
| Domestic Tax Authority [Member] | ||
| Deferred Tax Assets, Valuation Allowance, Total | 0 | |
| Operating Loss Carryforwards, Total | 603,000 | |
| State and Local Jurisdiction [Member] | ||
| Operating Loss Carryforwards, Subject to Expiration | 427,000 | |
| Foreign Tax Authority [Member] | ||
| Operating Loss Carryforwards, Total | $ 1,900,000 |
| X | ||||||||||
- Definition Amount of operating loss carryforward subject to expiration, before tax effects, available to reduce future taxable income under enacted tax laws. No definition available.
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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 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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| X | ||||||||||
- Definition Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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