Note 8 - Stock Compensation Plans - Vesting of Non-vested RSU Grants (Details) - Restricted Stock Units (RSUs) [Member] |
Jun. 30, 2023
shares
|
|---|---|
| RSUs vesting (in shares) | 1,038,716 |
| Vesting in 2023 [Member] | |
| RSUs vesting (in shares) | 199,000 |
| Vesting in 2024 [Member] | |
| RSUs vesting (in shares) | 300,608 |
| Represents vesting in 2025 [Member] | |
| RSUs vesting (in shares) | 539,108 |