Note 5 - Stock Incentive Plan - Schedule of Option Grants and Fair Value (Details) - $ / shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2023 |
Jun. 30, 2022 |
|
| Stock options granted (in shares) | 0 | 25,000 | 508,902 | 578,064 |
| Weighted-average grant date fair value per share (in dollars per share) | $ 0 | $ 2.00 | $ 2.38 | $ 2.11 |
| X | ||||||||||
- Definition Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|