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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract]    
Interest paid $ 46,065 $ 99,546
Federal, state, and local income taxes paid, net (14,675) 36,499
Change in contract receivables (13,518,203)  
Change in contract liabilities 13,518,203  
Property, plant, and equipment purchases in accounts payable $ 90,045 $ 108,345