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Note 18 - Fair Value of Financial Instruments - Securities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Marketable equity securities | $ 41,728 | $ 39,424
Fair Value, Inputs, Level 1 [Member] |  |
Marketable equity securities | $ 41,728 |
Fair Value, Inputs, Level 3 [Member] |  |
Marketable equity securities |  | $ 39,424

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