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Note 15 - Subsequent Events (Details Textual) - USD ($) |  | 12 Months Ended
--- | --- | ---
Mar. 01, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Repayments of Long-term Debt, Total |  | $ 9,615,246 | $ 670,965
HSBC Bank Mortgage Loan [Member] | Subsequent Event [Member] |  |  |
Repayments of Long-term Debt, Total | $ 1,700,000 |  |

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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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Period Type: | duration

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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_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |