Note 3 - Cash Equivalents and Investments - Held-to-maturity Investments (Details) - USD ($) |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Amortized cost | $ 76,813,334 | $ 78,565,491 |
| Unrealized gains | 29 | 22,547 |
| Unrealized Losses | (59,230) | (2,284) |
| Aggregate fair value | 76,754,133 | 78,585,754 |
| Amortized cost | 76,813,334 | 78,565,491 |
| US Treasury Securities [Member] | ||
| Amortized cost | 21,395,628 | 30,147,733 |
| Unrealized gains | 29 | 18,931 |
| Unrealized Losses | (27,088) | 0 |
| Aggregate fair value | 21,368,569 | 30,166,664 |
| Amortized cost | 21,395,628 | 30,147,733 |
| Commercial Paper, Not Included with Cash and Cash Equivalents [Member] | ||
| Amortized cost | 55,417,706 | 48,417,758 |
| Unrealized gains | 0 | 3,616 |
| Unrealized Losses | (32,142) | (2,284) |
| Aggregate fair value | 55,385,564 | 48,419,090 |
| Amortized cost | $ 55,417,706 | $ 48,417,758 |
| X | ||||||||||
- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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| X | ||||||||||
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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| X | ||||||||||
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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- Details
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