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Note 5 - Stockholders' Equity - Schedule of Warrants (Details) | Dec. 31, 2022 $ / shares shares
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Number of shares (in shares) | 13,384,115
Warrants 2020 [Member] |
Number of shares (in shares) | 120,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 1.65
Unit Warrants 2020 [Member] |
Number of shares (in shares) | 2,396,631
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 5.00
Representative Warrants 2020 [Member] |
Number of shares (in shares) | 128,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 5.50
Representative Warrants 2021 [Member] |
Number of shares (in shares) | 72,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 6.88
Warrants 2021 [Member] |
Number of shares (in shares) | 100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 13.00
January 2022 Common Warrants [Member] |
Number of shares (in shares) | 3,067,484
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 3.26
May 2022 Preferred Investment Options 1 [Member] |
Number of shares (in shares) | 7,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 1.65

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 + Details
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