SEGMENT INFORMATION - Revenue by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenue from External Customer [Line Items]
Consolidated total net sales	$ 43,014	$ 41,997	$ 129,534	$ 130,324
Percent of total revenue	100.00%	100.00%	100.00%	100.00%
Long-lived assets	$ 6,900		$ 6,900		$ 4,300
Inventories, net	12,711		12,711		9,385
Consolidated product sales
Revenue from External Customer [Line Items]
Consolidated total net sales	42,500	$ 40,400	128,100	$ 117,000
Consolidated pack sales and associate fees
Revenue from External Customer [Line Items]
Consolidated total net sales	600	1,800	1,700	13,500
Consolidated other
Revenue from External Customer [Line Items]
Consolidated total net sales	(100)	(200)	(300)	(200)
Americas
Revenue from External Customer [Line Items]
Consolidated total net sales	$ 13,300	$ 14,100	$ 44,300	$ 49,100
Percent of total revenue	30.90%	33.60%	34.20%	37.70%
Asia/Pacific
Revenue from External Customer [Line Items]
Consolidated total net sales	$ 26,600	$ 24,400	$ 75,200	$ 71,000
Percent of total revenue	61.90%	58.10%	58.10%	54.50%
EMEA
Revenue from External Customer [Line Items]
Consolidated total net sales	$ 3,100	$ 3,500	$ 10,000	$ 10,200
Percent of total revenue	7.20%	8.30%	7.70%	7.80%
Reportable Geographical Components | Americas
Revenue from External Customer [Line Items]
Long-lived assets	$ 5,600		$ 5,600		2,900
Inventories, net	5,000		5,000		3,500
Reportable Geographical Components | Asia/Pacific
Revenue from External Customer [Line Items]
Long-lived assets	1,200		1,200		1,300
Inventories, net	5,800		5,800		4,500
Reportable Geographical Components | EMEA
Revenue from External Customer [Line Items]
Long-lived assets	100		100		100
Inventories, net	$ 1,900		$ 1,900		$ 1,400