QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 66,993,982	$ 64,675,082	$ 58,454,954	$ 63,072,954	$ 66,950,298	$ 73,218,247	$ 62,560,094	$ 57,529,945	$ 253,196,972	$ 260,258,584	$ 269,302,023
Gross margin	23,345,672	19,511,544	18,163,521	19,748,080	21,790,178	19,765,760	16,263,260	18,910,892	80,768,817	76,730,090	88,891,839
Net income	4,396,778	2,234,764	1,459,183	1,495,941	(634,246)	445,629	(1,759,329)	(191,450)	9,586,666	(2,139,396)	$ 6,603,157
Dividends paid	$ 813,854	$ 819,059	$ 818,604	$ 817,901	$ 816,361	$ 823,564	$ 822,913	$ 834,228	$ 3,269,418	$ 3,297,066
Net (loss) income per common share:
Basic (in Dollars per share)	$ 0.59	$ 0.30	$ 0.20	$ 0.20	$ (0.09)	$ 0.06	$ (0.23)	$ (0.03)	$ 1.29	$ (0.29)	$ 0.87
Diluted (in Dollars per share)	$ 0.59	$ 0.30	$ 0.20	$ 0.20	$ (0.09)	$ 0.06	$ (0.23)	$ (0.03)	$ 1.29	$ (0.29)	$ 0.87