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Note 15 - Share-based Compensation (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ 0 |  | $ 0 |
Share-Based Payment Arrangement, Expense | $ 3,235 | $ 2,627 | 8,587 | $ 7,243
Share-Based Payment Arrangement, Option [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) | 4 years |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) | 10 years |  |  |
Share-Based Payment Arrangement, Option [Member] | Exercisable on the First Anniversary Date Following the Date of Grant [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | 25.00% |  |  |
Share-Based Payment Arrangement, Option [Member] | Exercisable on Semi-annual Basis [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | 12.50% |  |  |
Performance Shares [Member] |  |  |  |
Share-Based Payment Arrangement, Expense | $ 1,100 | $ 500 | 2,000 | $ 1,200
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 7,600 |  | $ 7,600 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 2 years 3 months 18 days |
Performance Shares [Member] | Minimum [Member] |  |  |  |
Sharebased Compensation Arrangement By Sharebased Payment Award Performance Award Value Percentage Of Based Amount | 0.00% |  | 0.00% |
Performance Shares [Member] | Maximum [Member] |  |  |  |
Sharebased Compensation Arrangement By Sharebased Payment Award Performance Award Value Percentage Of Based Amount | 200.00% |  | 200.00% |
Performance Shares [Member] | Vesting on the Third Anniversary [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | 100.00% |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 14,200 |  | $ 14,200 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 2 years 6 months |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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