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Note 4 - Fair Value of Financial Instruments - Marketable Securities (Details) | Jun. 30, 2024 USD ($)
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Commercial paper | $ 40,908,464
Commercial paper | 3,306
Commercial paper | 23,008
Commercial paper | 40,888,762
Commercial Paper, Not Included with Cash and Cash Equivalents [Member] |
Commercial paper | 25,828,920
Commercial paper | 0
Commercial paper | 20,543
Commercial paper | 25,808,377
US Treasury Bond Securities [Member] |
Commercial paper | 9,286,150
Commercial paper | 2,489
Commercial paper | 1,254
Commercial paper | 9,287,385
US Treasury Securities [Member] |
Commercial paper | 5,793,394
Commercial paper | 817
Commercial paper | 1,211
Commercial paper | $ 5,793,000

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