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Note 13 - Employee Stock Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024 | Feb. 29, 2024 | May 31, 2010
Share-Based Payment Arrangement, Expense | $ 2,150 | $ 355 |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share-Based Payment Arrangement, Accelerated Cost | $ 158 | 314 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ 27.08 |  |  |  |
The 2010 Stock Incentive Plan [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  |  |  | 2,130,000
The 2010 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share-Based Payment Arrangement, Expense | $ 1,589 | $ 1,424 |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 6,663 |  |  |  |
The 2010 Stock Incentive Plan [Member] | Performance Shares [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ 29.13 | $ 29.39 | $ 26.16 |  |
Share-Based Payment Arrangement, Expense | $ 561 |  |  |  |
Share-Based Payment Arrangement, Reversal of Expense |  | $ 1,069 |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 1,362 |  |  |  |
The 2024 Stock Incentive Plan [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  |  | 1,277,660 |
The 2024 Stock Incentive Plan [Member] | Minimum [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period (Year) | 10 years |  |  |  |

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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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