Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
NET SALES	$ 20,288,918	$ 20,149,845
COST OF SALES	7,445,956	7,863,800
Gross profit	12,842,962	12,286,045
OPERATING EXPENSES	11,074,001	10,548,554
INCOME FROM OPERATIONS	1,768,961	1,737,491
OTHER (INCOME) EXPENSE:
Interest expense	64,642	36,344
Other, net	(38,872)	(2,651)
Total other (income) expense	25,770	33,693
INCOME BEFORE INCOME TAXES	1,743,191	1,703,798
PROVISION FOR INCOME TAXES	469,572	472,533
NET INCOME	1,273,619	1,231,265
Foreign currency translation adjustments	21,791	356,340
COMPREHENSIVE INCOME	$ 1,295,410	$ 1,587,605
NET INCOME PER COMMON SHARE:
BASIC (in dollars per share)	$ 0.14	$ 0.13
DILUTED (in dollars per share)	$ 0.14	$ 0.13
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING:
BASIC (in shares)	9,264,446	9,308,726
DILUTED (in shares)	9,264,811	9,330,919