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Other Current Liabilities
 12 Months Ended
Dec. 31, 2015
Other Liabilities Disclosure [Abstract]  
Other Current Liabilities
(9) Other Current Liabilities

Other current liabilities are comprised of the following:

 

     December 31,  
     2014      2015  

Accrued payroll expenses

    $ 2,094,539       $ 2,247,886   

Deferred revenue

      840,547         1,156,510   

Dividends payable

      1,027,628         1,032,573   

Trade sales payable

      693,819         761,344   

Deferred rent

      351,648         560,169   

Income taxes payable

      2,413,145         —     

Prorations payable

      1,575,428         —     

Other accrued expenses

      867,774         1,829,624   
  

 

 

     

 

 

  
   $ 9,864,528       $ 7,588,106