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Note 4 - Marketable Securities (Tables) | 6 Months Ended
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Jun. 30, 2026
Notes Tables |
Fair Value, Marketable Securities Measured on a Recurring Basis [Table Text Block] |
|  | Fair Value Measurements Using Inputs Considered as of: |
|  | June 30, 2026 |  |  | December 31, 2025 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Government securities |  | $ | 32,063 |  |  | $ | — |  |  | $ | 32,063 |  |  | $ | — |  |  | $ | 39,421 |  |  | $ | — |  |  | $ | 39,421 |  |  | $ | — |
Commercial paper and corporate bonds |  |  | 6,312 |  |  |  | — |  |  |  | 6,312 |  |  |  | — |  |  |  | 4,822 |  |  |  | — |  |  |  | 4,822 |  |  |  | — |
Total |  | $ | 38,375 |  |  | $ | — |  |  | $ | 38,375 |  |  | $ | — |  |  | $ | 44,243 |  |  | $ | — |  |  | $ | 44,243 |  |  | $ | — |

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- Definition Tabular disclosure of marketable securities measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References No definition available. + Details
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