Note 4 - Fair Value of Financial Instruments - Marketable Securities (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Amortized Cost	$ 4,982,438	$ 12,623,154
Commercial paper	120	5,816
Commercial paper	(328)	0
Marketable securities	4,982,230	12,628,970
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	2,492,175	11,134,856
Commercial paper	95	5,024
Commercial paper	0	0
Marketable securities	2,492,270	11,139,880
US Treasury Bond Securities [Member]
Amortized Cost	2,240,263	1,237,794
Commercial paper	25	744
Commercial paper	(328)	0
Marketable securities	2,239,960	1,238,538
US Treasury Securities [Member]
Amortized Cost	250,000	250,504
Commercial paper	0	48
Commercial paper	0	0
Marketable securities	$ 250,000	$ 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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