Note 10 - Share-based Awards and Cash-based Awards - Summary of Incentive Compensation Expense Under Share-based Payment Arrangements (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Share-based compensation expense | $ 3,959 | $ 3,690 | $ 3,540 |
| Restricted Stock Units (RSUs) [Member] | |||
| Share-based compensation expense | 3,555 | 3,410 | 3,260 |
| Restricted Stock [Member] | |||
| Share-based compensation expense | $ 404 | $ 280 | $ 280 |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|