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Note 9 - Income Taxes - Operating Loss Carryforwards (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
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Domestic Tax Authority [Member] |  |
Operating loss carryforwards | $ 15,013,388 | $ 5,844,972
State and Local Jurisdiction [Member] |  |
Operating loss carryforwards | $ 15,007,966 | $ 5,844,972

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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=84230637&loc=d3e32559-109319 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |