Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
NET SALES	$ 20,784,652	$ 20,288,918
COST OF SALES	8,333,847	7,445,956
Gross profit	12,450,805	12,842,962
OPERATING EXPENSES	11,281,377	11,074,001
INCOME FROM OPERATIONS	1,169,428	1,768,961
OTHER (INCOME) EXPENSE:
Interest expense	32,383	64,642
Other, net	(33,041)	(38,872)
Total other (income) expense	(658)	25,770
INCOME BEFORE INCOME TAXES	1,170,086	1,743,191
PROVISION FOR INCOME TAXES	301,123	469,572
NET INCOME	868,963	1,273,619
Foreign currency translation adjustments	287,295	21,791
COMPREHENSIVE INCOME	$ 1,156,258	$ 1,295,410
NET INCOME PER COMMON SHARE:
BASIC (in dollars per share)	$ 0.10	$ 0.14
DILUTED (in dollars per share)	$ 0.10	$ 0.14
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING:
BASIC (in shares)	9,009,752	9,264,446
DILUTED (in shares)	9,010,037	9,264,811