QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 75,341	$ 67,179	$ 61,959	$ 65,929	$ 67,185	$ 65,916	$ 58,206	$ 61,387	$ 270,408	$ 252,694
Gross margin	28,252	25,014	21,441	22,978	24,132	22,400	19,532	20,965	97,685	87,029
Net income	5,085	5,616	3,156	3,605	3,608	5,045	2,649	3,251	17,462	14,553
Dividends paid	$ 1,029	$ 1,036	$ 1,035	$ 887	$ 891	$ 889	$ 889	$ 815	$ 3,987	$ 3,484
Net (loss) income per common share:
Basic (in Dollars per share)	$ 0.68	$ 0.76	$ 0.43	$ 0.49	$ 0.48	$ 0.68	$ 0.36	$ 0.44	$ 2.36	$ 1.96
Diluted (in Dollars per share)	$ 0.70	$ 0.75	$ 0.42	$ 0.48	$ 0.48	$ 0.67	$ 0.36	$ 0.44	$ 2.35	$ 1.95