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v3.22.2.2

Note 8 - Marketable Securities (Tables) | 9 Months Ended
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Sep. 30, 2022
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
|  | September 30, 2022 |
(in thousands) |  | Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
U.S. municipal securities |  | $ | 17,991 |  |  | $ | - |  |  | $ | (494 | ) |  | $ | 17,497 |
Corporate debt securities |  |  | 9,602 |  |  |  | - |  |  |  | (259 | ) |  |  | 9,343 |
U.S. government agency securities |  |  | 25,780 |  |  |  | - |  |  |  | (787 | ) |  |  | 24,993 |
Certificates of deposit/time deposits |  |  | 1,189 |  |  |  | - |  |  |  | (11 | ) |  |  | 1,178 |
Commercial paper |  |  | 1,500 |  |  |  | - |  |  |  | (1 | ) |  |  | 1,499 |
Total marketable securities |  | $ | 56,062 |  |  | $ | - |  |  | $ | (1,552 | ) |  | $ | 54,510 |
Debt Securities, Held-to-Maturity [Table Text Block] |
|  | December 31, 2021 |
(in thousands) |  | Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
U.S. municipal securities |  | $ | 12,549 |  |  | $ | - |  |  | $ | (70 | ) |  | $ | 12,479 |
Corporate debt securities |  |  | 9,303 |  |  |  | - |  |  |  | (44 | ) |  |  | 9,259 |
U.S. government agency securities |  |  | 2,500 |  |  |  | - |  |  |  | (12 | ) |  |  | 2,488 |
Certificates of deposit/time deposits |  |  | 1,687 |  |  |  | 7 |  |  |  | - |  |  |  | 1,694 |
Commercial paper |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total marketable securities |  | $ | 26,039 |  |  | $ | 7 |  |  | $ | (126 | ) |  | $ | 25,920 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | September 30, |
(in thousands) |  | 2022 |
Due in one year or less |  | $ | 25,253 |
Due after one year through five years |  |  | 29,257 |
Total marketable securities |  | $ | 54,510 |

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