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Note 4 - Fair Value of Financial Instruments - Assets Measured at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Commercial paper	$ 12,628,970	$ 29,922,523
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Commercial paper	11,139,880	18,032,943
US Treasury Securities [Member]
Commercial paper	250,552	3,938,520
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Total assets measured at fair value	6,300,291	7,559,336
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Commercial paper	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Commercial paper	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member]
Commercial paper	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member]
Money market accounts	6,300,291	7,559,336
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Commercial Paper [Member]
Money market accounts	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Total assets measured at fair value	13,628,300	29,922,523
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Commercial paper	11,139,880	18,032,943
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Commercial paper	1,238,538	7,951,060
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member]
Commercial paper	250,552	3,938,520
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member]
Money market accounts	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Commercial Paper [Member]
Money market accounts	999,330
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Total assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Commercial paper	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Commercial paper	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member]
Commercial paper	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member]
Money market accounts	0	$ 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Commercial Paper [Member]
Money market accounts	$ 0

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