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Note 4 - Fair Value of Financial Instruments - Marketable Securities (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Amortized Cost	$ 12,623,154	$ 29,866,326
Commercial paper	5,816	58,981
Commercial paper	0	(2,784)
Commercial paper	12,628,970	29,922,523
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	11,134,856	18,019,334
Commercial paper	5,024	16,393
Commercial paper	0	(2,784)
Commercial paper	11,139,880	18,032,943
US Treasury Bond Securities [Member]
Amortized Cost	1,237,794	7,920,620
Commercial paper	744	30,440
Commercial paper	0	0
Commercial paper	1,238,538	7,951,060
US Treasury Securities [Member]
Amortized Cost	250,504	3,926,372
Commercial paper	48	12,148
Commercial paper	0	0
Commercial paper	$ 250,552	$ 3,938,520

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