SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018 region	Dec. 31, 2018 USD ($) region segment country	Dec. 31, 2017 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment		1
Number of reporting segments | segment		1
Number of countries in which entity network marketing and distribution channels operates | country		25
Minimum percentage of revenue considered for accounted of major customer		10.00%
Number of countries in which company operates facilities | country		14
Number of countries in which company sells products | country		26
Number of regions in which company sells products | region	3	3
Revenue from External Customer [Line Items]
Consolidated net sales shipped to customers		$ 173,600	$ 176,700
Percent of total revenue		100.00%	100.00%
Long-lived assets by country of domicile [Abstract]
Long-lived assets		$ 6,800	$ 4,314
Inventory, by Country [Abstract]
Inventories, net		12,821	9,385
Consolidated product sales
Revenue from External Customer [Line Items]
Consolidated net sales shipped to customers		$ 170,200	$ 157,900
Percent of total revenue		98.00%	0.00%
Consolidated pack sales and associate fees(a)
Revenue from External Customer [Line Items]
Consolidated net sales shipped to customers		$ 2,500	$ 14,200
Percent of total revenue		0.00%	0.00%
Consolidated other, including freight
Revenue from External Customer [Line Items]
Consolidated net sales shipped to customers		$ 900	$ 4,600
Percent of total revenue		0.00%	0.00%
Reportable Geographical Components | Americas
Revenue from External Customer [Line Items]
Consolidated net sales shipped to customers		$ 58,700	$ 64,200
Percent of total revenue		33.80%	36.30%
Long-lived assets by country of domicile [Abstract]
Long-lived assets		$ 5,500	$ 2,900
Inventory, by Country [Abstract]
Inventories, net		4,500	3,500
Reportable Geographical Components | Asia/Pacific
Revenue from External Customer [Line Items]
Consolidated net sales shipped to customers		$ 101,700	$ 98,800
Percent of total revenue		58.60%	55.90%
Long-lived assets by country of domicile [Abstract]
Long-lived assets		$ 1,300	$ 1,300
Inventory, by Country [Abstract]
Inventories, net		6,300	4,500
Reportable Geographical Components | EMEA
Revenue from External Customer [Line Items]
Consolidated net sales shipped to customers		$ 13,200	$ 13,700
Percent of total revenue		7.60%	7.80%
Long-lived assets by country of domicile [Abstract]
Long-lived assets		$ 0	$ 100
Inventory, by Country [Abstract]
Inventories, net		$ 2,000	$ 1,400