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Note 17 - Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Allocated Share-based Compensation Expense | $ 2,678 | $ 2,438 | $ 2,352
Employee Stock Option [Member] |  |  |
Allocated Share-based Compensation Expense | 286 | 246 | 270
Restricted Stock |  |  |
Allocated Share-based Compensation Expense | 2,084 | 1,967 | 1,864
Employee Stock Purchase Plan |  |  |
Allocated Share-based Compensation Expense | $ 308 | $ 225 | $ 218

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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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