Note 7 - Warrants (Details Textual) - $ / shares |
9 Months Ended | ||
|---|---|---|---|
Sep. 30, 2023 |
Dec. 31, 2022 |
Nov. 30, 2019 |
|
| Class of Warrant or Right, Outstanding | 786,420 | 786,420 | |
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 5.19 | $ 5.19 | |
| Warrants and Rights Outstanding, Term | 1 year 4 months 24 days | ||
| Maximum Beneficial Ownership Percentage of Warrants | 4.99% | ||
| Maximum Beneficial Ownership Percentage of Warrants Upon Investor's Election | 9.99% | ||
| Prefunded Warrants [Member] | |||
| Class of Warrant or Right, Outstanding | 253,828 | 253,828 | |
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.001 | $ 0.001 | $ 0.001 |
| X | ||||||||||
- Definition Represents the maximum beneficial ownership percentage of warrants. No definition available.
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| X | ||||||||||
- Definition Represents the maximum beneficial ownership percentage of warrants upon investor's election. No definition available.
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| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of warrants or rights outstanding. No definition available.
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| X | ||||||||||
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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