Note 6 - Basic and Diluted Net Income (Loss) Per Share - Schedule of Dilutive Securities (Details) - shares shares in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Total Number of Potentially Dilutive Shares Excluded from the basic and diluted net loss per share calculation (in shares) | 10,900 | 10,300 |
| Common Stock Options and Warrants [Member] | ||
| Total Number of Potentially Dilutive Shares Excluded from the basic and diluted net loss per share calculation (in shares) | 9,727 | 9,139 |
| Debt with Conversion Feature [Member] | ||
| Total Number of Potentially Dilutive Shares Excluded from the basic and diluted net loss per share calculation (in shares) | 1,173 | 1,161 |