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Note 10 - Taxes (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2001 | Jun. 30, 1994
Undistributed Earnings of Domestic Subsidiaries |  |  | $ 3,684,000
Foreign Earnings Repatriated |  | $ 227,563 |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total | $ 0 |  |
Unrecognized Tax Benefits, Ending Balance | $ 0 |  |

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- Definition Amount of foreign earnings repatriated from subsidiaries outside the country of domicile. + References No definition available. + Details
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- Definition Amount of undistributed earnings of domestic subsidiaries or domestic joint ventures intended to be permanent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121573983&loc=d3e28200-109314 + Details
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- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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