Note 5 - Share-based Compensation - Schedule of Share-based Compensation Expense (Details) - $ / shares |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
Canceled / forfeited, weighted average exercise price (in dollars per share) | $ 85.8 | |||
Equity Incentive Plan [Member] | ||||
Canceled / forfeited, weighted average exercise price (in dollars per share) | $ 537,000 | $ 572,000 | 1,022,000 | $ 1,132,000 |
Equity Incentive Plan [Member] | Research and Development Expense [Member] | ||||
Canceled / forfeited, weighted average exercise price (in dollars per share) | 58,000 | 110,000 | 117,000 | 219,000 |
Equity Incentive Plan [Member] | Selling, General and Administrative Expenses [Member] | ||||
Canceled / forfeited, weighted average exercise price (in dollars per share) | $ 479,000 | $ 462,000 | $ 905,000 | $ 913,000 |