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Note 9 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of options and SAR units (1) |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term |  |  | Aggregate intrinsic-value |
Outstanding at the beginning of the year |  |  | 126,000 |  |  | $ | 20.06 |  |  |  | 2.6 |  |  | $ | 2,921 |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (19,000 | ) |  |  | 18.79 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (1,000 | ) |  |  | 24.86 |  |  |  |  |  |  |  |  |
Outstanding at the end of the year (2) |  |  | 106,000 |  |  | $ | 20.24 |  |  |  | 2.0 |  |  | $ | 609 |
Exercisable at the end of the year (2) |  |  | 106,000 |  |  | $ | 20.24 |  |  |  | 2.0 |  |  | $ | 609 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | Number of RSUs and PSUs |  |  | Weighted average grant-date fair value |
Unvested as at the beginning of the year |  |  | 688,073 |  |  | $ | 41.18 |
Granted |  |  | 628,611 |  |  |  | 34.52 |
Vested |  |  | (330,211 | ) |  |  | 37.61 |
Forfeited |  |  | (107,196 | ) |  |  | 43.72 |
Unvested at the end of the year |  |  | 879,277 |  |  | $ | 37.57 |

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