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4. SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 9 Months Ended
Sep. 30, 2015
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information Related Text Supplemental cash flow information is as follows:

    (Unaudited)  
    Nine Months Ended  
    September 30,  
    2015     2014  
             
Interest   $ 516,984     $ 609,004  
                 
Federal, state and local income taxes,                
  net of refunds   $ 5,541,408     $ 901,852  
                 
Fixed asset purchases in accounts payable   $ 430,594     $ 171,038