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Note 5 - Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   

September 30, 2024

 
   

(Level 1)

   

(Level 2)

   

(Level 3)

 
                         

Assets

                       
Cash equivalents (money market accounts)   $ 6,171,726     $     $  

Marketable securities:

                       

Commercial paper

  $     $ 23,616,596     $  

U.S. treasury bonds

          9,410,740        

U.S. government agency bonds

          5,885,900        

Total assets measured at fair value

  $ 6,171,726     $ 38,913,236     $  
                         
   

December 31, 2023

 

Assets

                       

Cash equivalents (money market accounts)

  $ 7,792,846     $     $  

Total assets measured at fair value

  $ 7,792,846     $     $  
Marketable Securities [Table Text Block]
   

Amortized Cost

   

Unrealized

gains

   

Unrealized

losses

   

Fair Value

 

Commercial paper

  $ 23,575,451     $ 41,667     $ (522 )   $ 23,616,596  

U.S. treasury bonds

    9,354,027       56,713             9,410,740  

U.S. government agency bonds

    5,860,596       25,304             5,885,900  

Total

  $ 38,790,074     $ 123,684     $ (522 )   $ 38,913,236  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   

Nine Months Ended

September 30,

 
   

2023

 

Balance as of January 1, 2023

  $ 12,414,000  

Fair value adjustment

    (646,000 )

Balance as of June 30, 2023

    11,768,000  

Fair value adjustment

    (4,778,251 )

Reclassification to additional paid in capital upon conversion

    (6,989,749 )

Balance as of September 30, 2023

  $