Note 8 - Stockholders' Equity- Stock Warrants (Details) - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2023 |
Dec. 31, 2022 |
|
| Warrants, outstanding (in shares) | 4,137,916 | |
| Outstanding, weighted average exercise price (in dollars per share) | $ 3.30 | |
| Outstanding, December 31, 2022 | $ 1,272 | $ 1 |
| Warrants, Granted (in shares) | 3,432,598 | |
| Granted, weighted average exercise price (in dollars per share) | $ 0.88 | |
| Warrants, Exercised (in shares) | (400,083) | |
| Exercised, weighted average exercise price (in dollars per share) | $ 0 | |
| Warrants, outstanding (in shares) | 7,170,431 | 4,137,916 |
| Outstanding, weighted average exercise price (in dollars per share) | $ 1.32 | $ 3.30 |
| X | ||||||||||
- Definition Aggregate intrinsic value of class of warrant or right. No definition available.
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| X | ||||||||||
- Definition The number of warrants or rights exercised during period. No definition available.
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| X | ||||||||||
- Definition Represents exercise price of warrant or right exercised during period. No definition available.
|
| X | ||||||||||
- Definition Represents exercise price of warrants or rights for warrants granted during period. No definition available.
|
| X | ||||||||||
- Definition The number of warrants or rights issued during period. No definition available.
|
| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Number of warrants or rights outstanding. No definition available.
|