SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract]
Interest paid	$ 415,527	$ 606,697	$ 724,651
Federal, state, and local income taxes paid, net	1,726,959	339,625	5,568,581
Property, plant, and equipment purchases in accounts payable	$ 182,823	$ 216,523	$ 92,903