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Note 5 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Corporate bonds | $ 143,117 | $ 132,695
Investments in marketable equity securities | 312 | 406
Foreign exchange contract |  | 988
Fair Value, Inputs, Level 1 [Member] |  |
Investments in marketable equity securities | 312 | 406
Foreign exchange contract |  | 0
Fair Value, Inputs, Level 2 [Member] |  |
Investments in marketable equity securities | 0 |
Foreign exchange contract |  | 988
Fair Value, Inputs, Level 3 [Member] |  |
Investments in marketable equity securities | 0 | 0
Foreign exchange contract |  | 0
Corporate Bonds [Member] |  |
Corporate bonds | 143,117 | 132,695
Corporate Bonds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Corporate bonds | 0 | 0
Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Corporate bonds | 143,117 | 132,695
Corporate Bonds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Corporate bonds | $ 0 | $ 0

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