Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
NET SALES	$ 277,309	$ 270,408
COST OF GOODS SOLD	172,574	172,723
GROSS MARGIN	104,735	97,685
OPERATING EXPENSES	77,565	75,600
INCOME FROM OPERATIONS	27,170	22,085
OTHER (EXPENSES) INCOME	(205)	146
INCOME BEFORE INCOME TAXES	26,965	22,231
INCOME TAX EXPENSE	6,001	4,769
NET INCOME	$ 20,964	$ 17,462
INCOME PER SHARE
Basic (in dollars per share)	$ 2.87	$ 2.36
Diluted (in dollars per share)	$ 2.86	$ 2.35
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING
Basic (in shares)	7,304	7,387
Diluted (in shares)	7,337	7,439