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Note 3 - Investments (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
|  | June 30, 2022 |
|  | Amortized |  |  | Gross unrealized |  |  | Estimated |
(In thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Available-for-sale securities, current portion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 10,361 |  |  | $ | - |  |  | $ | 26 |  |  | $ | 10,335 |
Corporate debt securities |  |  | 11,524 |  |  |  | - |  |  |  | 8 |  |  |  | 11,516 |
Other debt securities |  |  | 699 |  |  |  | - |  |  |  | 4 |  |  |  | 695 |
Total short-term |  |  | 22,584 |  |  |  | - |  |  |  | 38 |  |  |  | 22,546 |
Available-for-sale securities, long-term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other debt securities |  |  | 491 |  |  |  | - |  |  |  | 2 |  |  |  | 489 |
Total marketable securities |  | $ | 23,075 |  |  | $ | - |  |  | $ | 40 |  |  | $ | 23,035 |
|  | Amortized |  |  | Estimated |
(In thousands) |  | Cost |  |  | Fair Value |
Due in one year or less |  | $ | 22,584 |  |  | $ | 22,546 |
Due after one year through five years |  |  | 491 |  |  |  | 489 |
Total |  | $ | 23,075 |  |  | $ | 23,035 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 + Details
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- References No definition available. + Details
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