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Note 9 - Common Stock and Stock-based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended
--- | --- | ---
Feb. 11, 2026 | Mar. 31, 2026 | Mar. 31, 2025
Share-Based Payment Arrangement, Option [Member] |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  | $ 133 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  | 1 year 4 months 24 days |
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Employee [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  | 3 years |
RSUs and PSUs [Member] |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  | $ 29,772 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  | 1 year 6 months |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 652,422 |
Share-Based Payment Arrangement, Tranche One [Member] | Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Employee [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  | 1 year |
Share-Based Payment Arrangement, Tranche One [Member] | Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Nonemployee [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  | 1 year |
Vesting on February 19, 2027 [Member] | Short-Term Executive PSUs [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 33.40% |  |
Vesting on February 19, 2028 [Member] | Short-Term Executive PSUs [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 33.30% |  |
Vesting on February 19, 2029 [Member] | Short-Term Executive PSUs [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 33.30% |  |
The2011 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member] | Maximum [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  | 4 years |
The2011 Stock Incentive Plan [Member] | Performance Share Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Maximum Shares Issuable, Performance Achievement (in shares) | 234,617 |  |
The2011 Stock Incentive Plan [Member] | Performance Share Units [Member] | Executive Officer [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | 124,553 |  |
The2011 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Tranche One [Member] | Share-Based Payment Arrangement, Option [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage |  | 25.00% |
The2011 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Tranche One [Member] | Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  | 1 year |
The2011 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Tranche One [Member] | Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Nonemployee [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage |  | 25.00% |
The2011 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Tranche Two [Member] | Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Vesting Period |  | 36 months |
The2011 Stock Incentive Plan [Member] | Goals One [Member] | Performance Share Units [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 50.00% |  |
The2011 Stock Incentive Plan [Member] | Goals Two [Member] | Performance Share Units [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 25.00% |  |
The2011 Stock Incentive Plan [Member] | Goals Three [Member] | Performance Share Units [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 25.00% |  |
The 2002 Employee Stock Purchase Plan [Member] |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans |  | 87,475 | 70,207
Shares Issued, Price Per Share |  | $ 17.73 | $ 19.34
Proceeds from Stock Plans |  | $ 1,551 | $ 1,358

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