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Note 4 - Marketable Equity Securities (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Marketable Securities [Table Text Block] |
|  | 2022 |  |  | 2021 |
|  | (in thousands) |
Available-for-sale securities: |  |  |  |  |  |  |  |
Fair market value |  | $ | 41,728 |  |  | $ | 39,424 |
Cost |  |  | 30,350 |  |  |  | 29,385 |
Unrealized gain |  | $ | 11,378 |  |  | $ | 10,039 |
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  | 2022 |  |  | 2021 |
|  | (in thousands) |
Available-for-sale securities: |  |  |  |  |  |  |  |
Gross unrealized gains |  | $ | 13,478 |  |  | $ | 12,458 |
Gross unrealized losses |  |  | 2,100 |  |  |  | 2,419 |
Net unrealized gains |  | $ | 11,378 |  |  | $ | 10,039 |
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | 2022 |  |  | 2021 |  |  | 2020 |
|  | (in thousands) |
Realized (losses) gains: |  |  |  |  |  |  |  |  |  |  |  |
Sale proceeds |  | $ | - |  |  | $ | 3,109 |  |  | $ | 2,039 |
Cost of securities sold |  |  | - |  |  |  | 3,199 |  |  |  | 2,216 |
Realized (losses) / gains |  | $ | - |  |  | $ | (90 | ) |  | $ | (177 | )

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
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