Note 1 - Organization and Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities (Details) - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Potentially dilutive securities excluded from calculation (in shares) | 15,622,956 | 16,091,419 |
| Unvested Restricted Stock [Member] | ||
| Potentially dilutive securities excluded from calculation (in shares) | 11,360,541 | 11,439,016 |
| Share-Based Payment Arrangement, Option [Member] | ||
| Potentially dilutive securities excluded from calculation (in shares) | 4,073,816 | 4,465,216 |
| Warrant [Member] | ||
| Potentially dilutive securities excluded from calculation (in shares) | 165,214 | 165,214 |
| Convertible Debt Securities [Member] | ||
| Potentially dilutive securities excluded from calculation (in shares) | 23,385 | 21,973 |