Note 6 - Common Stock (Details Textual) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | ||
|---|---|---|---|
Mar. 31, 2024 |
Dec. 31, 2023 |
Nov. 30, 2019 |
|
| Prefunded Warrants [Member] | |||
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.001 | $ 0.001 | $ 0.001 |
| March 2024 Offering [Member] | |||
| Stock Issued During Period, Shares, New Issues (in shares) | 1,366,668 | ||
| Shares Issued, Price Per Share (in dollars per share) | $ 7.5 | ||
| Issuance of Stock, Underwriter Options, Number of Shares (in shares) | 300,000 | ||
| Proceeds from Issuance or Sale of Equity | $ 13.7 | ||
| March 2024 Offering [Member] | Prefunded Warrants [Member] | |||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 633,332 | ||
| Warrants Issued, Price Per Warrant (in dollars per share) | $ 7.499 | ||
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.001 |
| X | ||||||||||
- Definition Represents the number of shares underwriters can purchase as part of an issuance of stock. No definition available.
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| X | ||||||||||
- Definition Represents the price per warrant for warrants issued during the period. 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 securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Per share or per unit amount of equity securities issued. No definition available.
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| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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