Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net sales	$ 82,923,992	$ 84,161,200	$ 83,430,912
COST OF SALES	31,210,750	32,090,140	31,306,155
Gross Profit	51,713,242	52,071,060	52,124,757
OPERATING EXPENSES	41,412,511	41,596,360	40,166,728
INCOME FROM OPERATIONS	10,300,731	10,474,700	11,958,029
OTHER (INCOME) EXPENSE:
Interest expense	155,189	330,004	225,584
Other, net	(57,287)	(74,357)	(75,165)
Total other expense	97,902	255,647	150,419
INCOME BEFORE NCOME TAXES	10,202,829	10,219,053	11,807,610
PROVISION FOR INCOME TAXES	3,800,570	3,816,648	4,100,689
NET INCOME	6,402,259	6,402,405	7,706,921
Foreign currency translation adjustments	(205,450)	(999,621)	(776,307)
COMPREHENSIVE INCOME	$ 6,196,809	$ 5,402,784	$ 6,930,614
NET INCOME PER COMMON SHARE:
BASIC (in dollars per share)	$ 0.69	$ 0.64	$ 0.76
DILUTED (in dollars per share)	$ 0.69	$ 0.63	$ 0.75
Weighted Average Number of Shares Outstanding:
Basic (in shares)	9,301,867	10,077,506	10,203,063
Diluted (in shares)	9,321,558	10,102,760	10,241,121