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Note 8 - Note Payable (Details Textual) - USD ($) | May 07, 2021 | Apr. 27, 2020 | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Notes Payable, Current, Total |  |  | $ 276,180 | $ 276,180
Paycheck Protection Program CARES Act [Member] |  |  |  |
Proceeds from Notes Payable, Total |  | $ 276,000 |  |
Paycheck Protection Program CARES Act [Member] | Subsequent Event [Member] |  |  |  |
Debt Instrument, Decrease, Forgiveness | $ 201,000 |  |  |
Notes Payable, Current, Total | $ 75,000 |  |  |

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- Definition Decrease for amounts of indebtedness forgiven by the holder of the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash inflow from a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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