Note 4 - Fair Value of Financial Instruments - Marketable Securities (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Amortized Cost	$ 2,475,489	$ 12,623,154
Commercial paper	133	5,816
Commercial paper	(27)	0
Marketable securities	2,475,595	12,628,970
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	988,567	11,134,856
Commercial paper	0	5,024
Commercial paper	(27)	0
Marketable securities	988,540	11,139,880
US Treasury Bond Securities [Member]
Amortized Cost	1,486,922	1,237,794
Commercial paper	133	744
Commercial paper	0	0
Marketable securities	$ 1,487,055	1,238,538
US Treasury Securities [Member]
Amortized Cost		250,504
Commercial paper		48
Commercial paper		0
Marketable securities		$ 250,552

Amortized cost of 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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+ Details

- Definition

Amount of 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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