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Note 19 - Fair Value Measurements - Recurring Fair Value Measurement (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Total assets measured at fair value | $ 193 | $ 2,872
Fair Value, Inputs, Level 1 [Member] |  |
Total assets measured at fair value | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Total assets measured at fair value | 193 | 2,872
Fair Value, Inputs, Level 3 [Member] |  |
Total assets measured at fair value | 0 | 0
Debt Security, Corporate, US [Member] |  |
Trading debt securities | 193 | 2,872
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Trading debt securities | 0 | 0
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Trading debt securities | 193 | 2,872
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Trading debt securities | $ 0 | $ 0

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