Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
SALES	$ 448,508	$ 415,581
COST OF SALES	301,153	279,839
GROSS PROFIT	147,355	135,742
OPERATING EXPENSES
Selling expenses	91,439	85,940
General and administrative expenses	39,811	35,053
Marketing related intangible asset impairment	1,086
Total operating expenses	132,336	120,993
INCOME FROM OPERATIONS	15,019	14,749
OTHER INCOME (EXPENSE)
Interest income	1,375	1,260
Interest expense	(1,989)	(1,648)
Other income	1,977	3,509
Total other income	1,363	3,121
INCOME BEFORE INCOME TAX EXPENSE	16,382	17,870
INCOME TAX EXPENSE	(4,942)	(5,805)
NET INCOME	11,440	12,065
Net loss attributable to the non-controlling interest	568	394
NET INCOME ATTRIBUTABLE TO THE COMPANY	12,008	12,459
NET INCOME	11,440	12,065
Foreign currency translation gain	(6,163)	5,882
COMPREHENSIVE INCOME	5,277	17,947
Comprehensive loss attributable to the noncontrolling interest	79	450
COMPREHENSIVE INCOME ATTRIBUTABLE TO THE COMPANY	$ 5,198	$ 18,397
EARNINGS PER SHARE ATTRIBUTABLE TO THE COMPANY'S STOCKHOLDERS:
Basic and diluted	$ 0.81	$ 0.84
Weighted average number of shares outstanding Basic and diluted	14,796,947	14,795,992