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Stockholders' Equity
3 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Stockholders' Equity
(4)
Stockholders’ Equity
The changes in stockholders’ equity for the three months ended March 31, 2020 and 2021 are as follows:
 
   
Three months ended March 31,
 
   
2020
   
2021
 
Beginning balance
  $284,471,958   $267,101,820 
Stock-based compensation
   266,439    520,801 
Acquisition of noncontrolling interest
   —      (4,490,130
Purchase of treasury stock
   (15,875   (784,902
Net loss
   (8,946,163   (10,684,641
Elimination of noncontrolling interest
   —      1,076,849 
Cash dividends
   (1,398,321   —   
  
 
 
   
 
 
 
Ending balance
  $274,378,038   $252,739,797