Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
NET SALES	$ 84,161,200	$ 83,430,912	$ 78,284,585
COST OF SALES	32,090,140	31,306,155	28,956,561
Gross Profit	52,071,060	52,124,757	49,328,024
OPERATING EXPENSES	41,596,360	40,166,728	38,061,234
INCOME FROM OPERATIONS	10,474,700	11,958,029	11,266,790
OTHER (INCOME) EXPENSE:
Interest expense	330,004	225,584	206,763
Other, net	(74,357)	(75,165)	(160,732)
Total other expense	255,647	150,419	46,031
INCOME BEFORE NCOME TAXES	10,219,053	11,807,610	11,220,759
PROVISION FOR INCOME TAXES	3,816,648	4,100,689	3,955,042
NET INCOME	$ 6,402,405	$ 7,706,921	$ 7,265,717
NET INCOME PER COMMON SHARE:
BASIC (in dollars per share)	$ 0.64	$ 0.76	$ 0.71
DILUTED (in dollars per share)	$ 0.63	$ 0.75	$ 0.71
Weighted Average Number of Shares Outstanding:
Basic (in shares)	10,077,506	10,203,063	10,176,492
Diluted (in shares)	10,102,760	10,241,121	10,216,438