SEGMENT INFORMATION - Revenue by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 39,656	$ 43,014	$ 118,340	$ 129,534
Percent of total revenue	100.00%	100.00%	100.00%	100.00%
Long-lived assets	$ 6,100		$ 6,100		$ 6,800
Inventories, net	12,162		12,162		12,821
Consolidated product sales
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	38,700	$ 42,300	115,800	$ 127,100
Consolidated pack sales and associate fees
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	700	600	1,800	1,700
Consolidated other
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	300	100	700	700
Americas
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,800	$ 13,300	$ 36,100	$ 44,300
Percent of total revenue	29.70%	30.90%	30.50%	34.20%
Asia/Pacific
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 24,300	$ 26,600	$ 71,900	$ 75,200
Percent of total revenue	61.20%	61.90%	60.80%	58.10%
EMEA
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,600	$ 3,100	$ 10,300	$ 10,000
Percent of total revenue	9.10%	7.20%	8.70%	7.70%
Reportable Geographical Components | Americas
Revenue from External Customer [Line Items]
Long-lived assets	$ 5,000		$ 5,000		5,500
Inventories, net	5,300		5,300		4,500
Reportable Geographical Components | Asia/Pacific
Revenue from External Customer [Line Items]
Long-lived assets	1,100		1,100		1,300
Inventories, net	5,500		5,500		6,300
Reportable Geographical Components | EMEA
Revenue from External Customer [Line Items]
Long-lived assets	0		0		0
Inventories, net	$ 1,400		$ 1,400		$ 2,000