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Note 12 - Income Tax (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Percent, Total | 5.10% | 11.20%
Unrecognized Tax Benefits, Ending Balance | $ 0 | $ 0
Domestic Tax Authority [Member] |  |
Operating Loss Carryforwards, Total | $ 860,000 |
Effective Income Tax Rate Reconciliation, Percent, Total | 5.10% |
Open Tax Year | 2017 2018 2019 2020 2021 |
State and Local Jurisdiction [Member] |  |
Open Tax Year | 2016 2017 2018 2019 2020 2021 |

X
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. + 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 (e) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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