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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract]    
Interest paid $ 92,936 $ 174,202
Federal, state, and local income taxes paid, net (234,384) 553,123
Change in contract receivables (8,633,764)  
Change in contract liabilities 8,633,764  
Property, plant, and equipment purchases in accounts payable $ 170,340 $ 779,257