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4. SUPPLEMENTAL CASH FLOW INFORMATION
3 Months Ended
Mar. 31, 2016
Supplemental Cash Flow Elements [Abstract]  
Cash Flow, Supplemental Disclosures [Text Block]
4. SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow information is as follows:


    (Unaudited)  
    Three Months Ended  
    March 31,  
    2016     2015  
             
Interest   $ 117,947     $ 155,196  
                 
Federal, state and local income taxes,                
net of refunds   $ 988,056     $ 3,500,971  
                 
Fixed asset purchases in accounts payable   $ 148,357     $ 147,296