Note 5 - Stock Incentive Plan - Schedule of Option Grants and Fair Value (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Stock options granted (in shares) | 22,500 | 27,800 | 248,381 | 43,523 |
| Weighted-average grant date fair value per share (in dollars per share) | $ 37.52 | $ 2.91 | $ 29.98 | $ 2.72 |
| Fair value of shares vested | $ 810,749 | $ 145,763 | $ 2,513,309 | $ 505,504 |
| X | ||||||||||
- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| 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
|