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4. SUPPLEMENTAL CASH FLOW INFORMATION (Details) - Supplemental Cash Flow Information (USD $)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Supplemental Cash Flow Information [Abstract]    
Interest $ 387,994 $ 269,953
Federal, state and local income taxes, net of refunds 964,750 2,020,008
Fixed asset purchases in accounts payable $ 133,508 $ 281,812