v3.25.1
Note 4 - Fair Value of Financial Instruments - Assets Measured at Fair Value on Recurring Basis (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Commercial paper $ 24,742,800 $ 29,922,523
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]    
Commercial paper 15,313,835 18,032,943
US Treasury Securities [Member]    
Commercial paper 1,962,800 3,938,520
Corporate Debt Securities [Member]    
Commercial paper 1,488,405  
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Total assets measured at fair value 8,119,174 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] | Corporate 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) 8,119,174 7,559,336
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Total assets measured at fair value 24,742,800 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 15,313,835 18,032,943
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Commercial paper 5,977,760 7,951,060
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Debt Securities [Member]    
Commercial paper 1,962,800 3,938,520
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]    
Commercial paper 1,488,405  
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 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] | Corporate 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