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Note 5 - Fair Value of Financial Instruments - Marketable Securities (Details)	Sep. 30, 2024 USD ($)
Commercial paper	$ 38,790,074
Commercial paper	123,684
Commercial paper	522
Commercial paper	38,913,236
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Commercial paper	23,575,451
Commercial paper	41,667
Commercial paper	522
Commercial paper	23,616,596
US Treasury Bond Securities [Member]
Commercial paper	9,354,027
Commercial paper	56,713
Commercial paper	(0)
Commercial paper	9,410,740
US Treasury Securities [Member]
Commercial paper	5,860,596
Commercial paper	25,304
Commercial paper	(0)
Commercial paper	$ 5,885,900

X

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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).

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