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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, 2021 | Dec. 31, 2020
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Marketable equity securities | $ 39,424 | $ 27,941
Fair Value, Inputs, Level 1 [Member] |  |
Marketable equity securities | $ 39,424 |
Fair Value, Inputs, Level 3 [Member] |  |
Marketable equity securities |  | $ 27,941

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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + Details
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