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Note 4 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | Number of stock awards (in thousands) |  |  | Weighted average grant date fair value |
Unvested at December 31, 2020 |  |  | 645 |  |  | $ | 16.25 |
Granted |  |  | 252 |  |  | $ | 21.34 |
Vested |  |  | (218 | ) |  | $ | 16.57 |
Forfeited |  |  | (117 | ) |  | $ | 15.31 |
Unvested at December 31, 2021 |  |  | 562 |  |  | $ | 18.12 |
Granted |  |  | 155 |  |  | $ | 22.08 |
Vested |  |  | (223 | ) |  | $ | 18.79 |
Forfeited |  |  | (5 | ) |  | $ | 13.94 |
Unvested at December 31, 2022 |  |  | 489 |  |  | $ | 19.12 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of options (in thousands) |  |  | Weighted average exercise price |  |  | Weighted average grant date fair value |  |  | Weighted average remaining contractual term |  |  | Aggregate intrinsic value (in thousands) |
Outstanding at December 31, 2020 |  |  | 721 |  |  | $ | 15.77 |  |  | $ | 7.26 |  |  |  | 9.8 years |  |  | $ | (692 | )
Options granted |  |  | 450 |  |  | $ | 21.24 |  |  | $ | 9.85 |  |  |  |  |  |  |  |  |
Options exercised |  |  | - |  |  | $ | - |  |  |  |  |  |  |  |  |  |  |  |  |
Options forfeited |  |  | (60 | ) |  | $ | 15.77 |  |  | $ | 7.26 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2021 |  |  | 1,111 |  |  | $ | 17.99 |  |  | $ | 8.31 |  |  |  | 9.0 years |  |  | $ | 9,382 |
Options granted |  |  | - |  |  | $ | - |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercised |  |  | (24 | ) |  | $ | 15.77 |  |  | $ | 4.90 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | - |  |  | $ | - |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2022 |  |  | 1,087 |  |  | $ | 18.04 |  |  | $ | 8.39 |  |  |  | 8.0 years |  |  | $ | 17,968 |
Exercisable at December 31, 2022 |  |  | 141 |  |  | $ | 15.77 |  |  | $ | 4.90 |  |  |  | 7.9 years |  |  | $ | 2,649 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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