Note 6 - Share-based Compensation - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] |
3 Months Ended |
---|---|
Mar. 31, 2021
$ / shares
shares
| |
Outstanding, restricted stock units (in shares) | shares | 93,187 |
Outstanding, weighted average award date fair value (in dollars per share) | $ / shares | $ 35.03 |
Awarded, restricted stock units (in shares) | shares | 45,292 |
Awarded, weighted average award date fair value (in dollars per share) | $ / shares | $ 49.14 |
Shares vested, restricted stock units (in shares) | shares | (33,987) |
Shares vested, weighted average award date fair value (in dollars per share) | $ / shares | $ 31.29 |
Outstanding, restricted stock units (in shares) | shares | 104,492 |
Outstanding, weighted average award date fair value (in dollars per share) | $ / shares | $ 42.72 |