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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment
Property and equipment is comprised of the following:
 
  
December 31,
  
Estimated
useful lives
(years)
 
  
2017
  
2018
 
Land
 $18,904,830  $18,895,107   —   
Buildings and improvements
  20,299,377   22,239,322   
15-30
 
Broadcast equipment
  35,748,619   37,939,156   
5-15
 
Transportation equipment
  2,043,463   2,228,450   5 
Office equipment
  5,696,843   5,939,184   
5-10
 
Construction in progress
  3,496,229   2,153,238   —   
  
 
 
  
 
 
  
 
 
 
   86,189,361   89,394,457     
Less accumulated depreciation and amortization
  (26,870,428  (31,640,811    
  
 
 
  
 
 
     
  $59,318,933  $57,753,646