XML 30 R19.htm IDEA: XBRL DOCUMENT v3.22.2.2
Note 5 - Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

Fair value measurement at reporting date

 
  

Quoted prices in

active markets for

identical assets

(Level 1)

  

Significant other

observable inputs

(Level 2)

  

Significant

unobservable

inputs (Level 3)

 

September 30, 2022:

            

Cash equivalents:

            

Money market funds

 $4,317,557  $  $ 

Commercial paper

     992,526    

Total cash equivalents

 $4,317,557  $992,526  $ 
             

Marketable securities

            

Commercial paper

     15,300,580    

US treasury

     3,970,360    

Total marketable securities

 $  $19,270,940  $ 
             

Total financial assets

 $4,317,557  $20,263,466  $