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Note 7 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Corporate bonds | $ 97,703 | $ 112,080
Foreign exchange contracts | 2 | 13
Investments in marketable equity securities | 172 | 408
Foreign exchange contracts | 164 | 119
Fair Value, Inputs, Level 1 [Member] |  |
Foreign exchange contracts | 0 | 0
Investments in marketable equity securities | 172 | 408
Foreign exchange contracts | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Foreign exchange contracts | 2 | 13
Investments in marketable equity securities | 0 | 0
Foreign exchange contracts | 164 | 119
Fair Value, Inputs, Level 3 [Member] |  |
Foreign exchange contracts | 0 | 0
Investments in marketable equity securities | 0 | 0
Foreign exchange contracts | 0 | 0
Corporate Bonds [Member] |  |
Corporate bonds | 97,703 | 112,080
Corporate Bonds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Corporate bonds | 0 | 0
Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Corporate bonds | 97,703 | 112,080
Corporate Bonds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Corporate bonds | $ 0 | $ 0

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