Note 4 - Fair Value Measurements (Details Textual) - $ / shares |
Mar. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 1.32 | $ 3.30 |
| October 2022 Warrants [Member] | ||
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 1.55 |
| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
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