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Note 4 - Marketable Equity Securities (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Marketable Securities [Table Text Block] |
|  | 2023 |  |  | 2022 |
|  | (in thousands) |
Available-for-sale securities: |  |  |  |  |  |  |  |
Fair market value |  | $ | 43,203 |  |  | $ | 41,728 |
Cost |  |  | 30,294 |  |  |  | 30,350 |
Unrealized gain |  | $ | 12,909 |  |  | $ | 11,378 |
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  | 2023 |  |  | 2022 |
|  | (in thousands) |
Available-for-sale securities: |  |  |  |  |  |  |  |
Gross unrealized gains |  | $ | 15,539 |  |  | $ | 13,478 |
Gross unrealized losses |  |  | 2,630 |  |  |  | 2,100 |
Net unrealized gains |  | $ | 12,909 |  |  | $ | 11,378 |
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | 2023 |  |  | 2022 |  |  | 2021 |
|  | (in thousands) |
Realized (losses) gains: |  |  |  |  |  |  |  |  |  |  |  |
Sale proceeds |  | $ | 343 |  |  | $ | - |  |  | $ | 3,109 |
Cost of securities sold |  |  | 255 |  |  |  | - |  |  |  | 3,199 |
Realized (losses) / gains |  | $ | 88 |  |  | $ | - |  |  | $ | (90 | )

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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
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