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Note D - Marketable Equity Securities (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Marketable Securities [Table Text Block] |
|  | September 30, 2020 |  |  | December 31, 2019 |
|  | (in thousands) |
Fair market value |  | $ | 25,157 |  |  | $ | 29,521 |
Cost |  |  | 26,551 |  |  |  | 24,156 |
Unrealized (loss) / gain |  | $ | (1,394 | ) |  | $ | 5,365 |
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  | September 30, 2020 |  |  | December 31, 2019 |
|  | (in thousands) |
Gross unrealized gains |  | $ | 5,310 |  |  | $ | 7,808 |
Gross unrealized losses |  |  | 6,704 |  |  |  | 2,443 |
Net unrealized (loss) / gain |  | $ | (1,394 | ) |  | $ | 5,365 |
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
|  | (in thousands, except per share data) |
Sales proceeds |  | $ | - |  |  | $ | 883 |  |  | $ | 861 |  |  | $ | 1,645 |
Cost of securities sold |  |  | - |  |  |  | 557 |  |  |  | 1,466 |  |  |  | 805 |
Realized gain / (loss) |  | $ | - |  |  | $ | 326 |  |  | $ | (605 | ) |  | $ | 840 |

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