SEGMENT INFORMATION - Revenue by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 37,973	$ 41,383
Percent of total revenue	100.00%	100.00%
Long-lived assets	$ 6,600		$ 6,800
Inventories, net	12,848		12,821
Consolidated product sales
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	37,200	$ 40,700
Consolidated pack sales and associate fees
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	600	500
Consolidated other
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	200	200
Americas
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,900	$ 13,700
Percent of total revenue	31.30%	33.10%
Asia/Pacific
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 22,800	$ 24,200
Percent of total revenue	60.00%	58.40%
EMEA
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,300	$ 3,500
Percent of total revenue	8.70%	8.50%
Reportable Geographical Components | Americas
Revenue from External Customer [Line Items]
Long-lived assets	$ 5,400		5,500
Inventories, net	5,000		4,500
Reportable Geographical Components | Asia/Pacific
Revenue from External Customer [Line Items]
Long-lived assets	1,100		1,300
Inventories, net	6,400		6,300
Reportable Geographical Components | EMEA
Revenue from External Customer [Line Items]
Long-lived assets	100		0
Inventories, net	$ 1,400		$ 2,000