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Marketable Securities (Tables)
 9 Months Ended
Sep. 30, 2021
Marketable Securities  
Summary of Investment in marketable security
               
             
   Adjusted Cost   Unrealized Gain/(Loss)   Fair Value 
Corporate Bonds  $50,870,232   $(140,716)  $50,729,516 
U.S. Treasury   27,074,769    (62,950)   27,011,819 
U.S. agency and government sponsored securities   6,898,275    (12,234)   6,886,041 
U.S. states and municipalities   15,549,377    (60,999)   15,488,378 
Asset-Backed   24,301,617    (75,488)   24,226,129 
Commercial paper   998,002    451    998,453 
Total  $125,692,272   $(351,936)  $125,340,336 
Summary of contractual maturity
     
     
   Fair Value 
Due after 1 year through 5 years  $104,873,382 
Due after 5 years through 10 years   6,740,772 
Due after 10 years (a)   13,726,182 
Total  $125,340,336 

 

  (a) Included within this category are municipal bonds with a fair value of $2,300,000 that the Company plans to sell within the next twelve months.