Note 5 - Share-Based Compensation - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] |
3 Months Ended |
---|---|
Mar. 31, 2019
$ / shares
shares
| |
Outstanding, restricted stock units (in shares) | shares | 72,176 |
Outstanding, weighted average award date fair value (in dollars per share) | $ / shares | $ 23.60 |
Awarded, restricted stock units (in shares) | shares | 61,710 |
Awarded, weighted average award date fair value (in dollars per share) | $ / shares | $ 33.05 |
Shares vested, restricted stock units (in shares) | shares | (19,860) |
Shares vested, weighted average award date fair value (in dollars per share) | $ / shares | $ 23.53 |
Outstanding, restricted stock units (in shares) | shares | 114,026 |
Outstanding, weighted average award date fair value (in dollars per share) | $ / shares | $ 26.12 |