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Note 5 - Fair Value of Financial Instruments - Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Commercial paper | $ 38,913,236 |
Commercial Paper, Not Included with Cash and Cash Equivalents [Member] |  |
Commercial paper | 23,616,596 |
US Treasury Securities [Member] |  |
Commercial paper | 5,885,900 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Total assets measured at fair value | 6,171,726 | $ 7,792,846
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member] |  |
Commercial paper | 0 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member] |  |
Commercial paper | 0 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member] |  |
Commercial paper | 0 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member] |  |
Cash equivalents (money market accounts) | 6,171,726 | 7,792,846
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Total assets measured at fair value | 38,913,236 | 0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member] |  |
Commercial paper | 23,616,596 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member] |  |
Commercial paper | 9,410,740 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member] |  |
Commercial paper | 5,885,900 |
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] |  |
Commercial paper | 0 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member] |  |
Commercial paper | 0 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member] |  |
Commercial paper | 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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