Note 9 - Stockholders' Equity - Restricted Stock Unit Activity (Details) - $ / shares |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2026 |
|
| Balance, weighted average exercise price (in dollars per share) | $ 11,697.23 | $ 11,697 | $ 11,697 |
| Granted, weighted average exercise price (in dollars per share) | 0 | 0 | |
| Balance, weighted average exercise price (in dollars per share) | $ 11,697.23 | $ 11,697.23 | $ 11,697.23 |
| Restricted Stock Units (RSUs) [Member] | |||
| Balance (in shares) | 76 | 76 | |
| Balance, weighted average exercise price (in dollars per share) | $ 3,102 | $ 3,102 | |
| Granted (in shares) | 0 | ||
| Granted, weighted average exercise price (in dollars per share) | $ 0 | ||
| Vested or forfeited (in shares) | 0 | ||
| Vested or forfeited, weighted average exercise price (in dollars per share) | $ 0 | ||
| Balance (in shares) | 76 | 76 | |
| Balance, weighted average exercise price (in dollars per share) | $ 3,102 | $ 3,102 | |