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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment

Property and equipment is comprised of the following:

 

     December 31,      Estimated
useful lives
(years)
 
     2016      2017     

Land

   $ 18,789,852      $ 18,904,830        —    

Buildings and improvements

     19,602,568        20,299,377        15-30  

Broadcast equipment

     33,450,365        35,748,619        5-15  

Transportation equipment

     1,883,038        2,043,463        5  

Office equipment

     5,201,349        5,696,843        5-10  

Construction in progress

     1,579,022        3,496,229        —    
  

 

 

    

 

 

    
     80,506,194        86,189,361     

Less accumulated depreciation and amortization

     (20,716,575      (26,870,428   
  

 

 

    

 

 

    
   $ 59,789,619      $ 59,318,933