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Fair Value of Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2021
Fair Value of Financial Instruments [Abstract]  
Fair Value of Financial Instruments

There were no transfers among Levels 1, 2, or 3 during 2021 or 2020.
   
Fair Value Measurements at Reporting Date Using
  
   
Total
    
Quoted Prices in
Active Markets
(Level 1)
    
Quoted Prices in
Inactive Markets
(Level 2)
    
Significant
Unobservable Inputs
(Level 3)
  
As of June 30, 2021: (unaudited)
                        
Cash and cash equivalents
  
$
74,749,201
    
$
74,749,201
    
$
–
    
$
–
  
                                 
As of December 31, 2020:
                                
Cash and cash equivalents
  
$
28,839,565
    
$
28,839,565
    
$
–
    
$
–