Note 4 - Fair Value of Financial Instruments - Marketable Securities (Details) - USD ($) |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Amortized cost | $ 24,721,577 | $ 29,866,326 |
| Unrealized gains | 22,012 | 58,981 |
| Unrealized losses | (789) | (2,784) |
| Commercial paper | 24,742,800 | 29,922,523 |
| Commercial Paper, Not Included with Cash and Cash Equivalents [Member] | ||
| Amortized cost | 15,311,824 | 18,019,334 |
| Unrealized gains | 2,800 | 16,393 |
| Unrealized losses | (789) | (2,784) |
| Commercial paper | 15,313,835 | 18,032,943 |
| US Treasury Bond Securities [Member] | ||
| Amortized cost | 5,964,637 | 7,920,620 |
| Unrealized gains | 13,123 | 30,440 |
| Unrealized losses | 0 | 0 |
| Commercial paper | 5,977,760 | 7,951,060 |
| US Treasury Securities [Member] | ||
| Amortized cost | 1,956,902 | 3,926,372 |
| Unrealized gains | 5,898 | 12,148 |
| Unrealized losses | 0 | 0 |
| Commercial paper | 1,962,800 | $ 3,938,520 |
| Corporate Debt Securities [Member] | ||
| Amortized cost | 1,488,214 | |
| Unrealized gains | 191 | |
| Unrealized losses | 0 | |
| Commercial paper | $ 1,488,405 |
| X | ||||||||||
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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