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Note 4 - Fair Value of Financial Instruments - Assets Measured at Fair Value on Recurring Basis (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Marketable securities	$ 17,856,688	$ 29,922,523
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable securities	16,359,643	18,032,943
US Treasury Securities [Member]
Marketable securities		3,938,520
Corporate Debt Securities [Member]
Marketable securities	1,497,045
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Total assets measured at fair value	8,822,414	7,559,336
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable securities	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Marketable securities		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member]
Marketable securities		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Marketable securities	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member]
Cash equivalents (money market accounts)	8,822,414	7,559,336
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Total assets measured at fair value	17,856,688	29,922,523
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable securities	16,359,643	18,032,943
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Marketable securities		7,951,060
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member]
Marketable securities		3,938,520
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Marketable securities	1,497,045
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member]
Cash equivalents (money market accounts)	0	0
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]
Marketable securities	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Marketable securities		0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member]
Marketable securities		0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Marketable securities	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member]
Cash equivalents (money market accounts)	$ 0	$ 0

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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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