SEGMENT INFORMATION - Revenue by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 39,446	$ 37,966	$ 120,269	$ 112,218
Percent of total revenue	100.00%	100.00%	100.00%	100.00%
Long-lived assets	$ 4,400		$ 4,400		$ 5,400
Inventories, net	13,853		13,853		12,827
Consolidated product sales
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	36,900	$ 35,700	113,200	$ 108,700
Consolidated pack sales and associate fees
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,400	2,000	6,500	2,800
Consolidated other
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	100	300	600	700
Americas
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,200	$ 11,400	$ 34,500	$ 34,100
Percent of total revenue	28.40%	30.00%	28.70%	30.40%
Asia/Pacific
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 24,200	$ 23,000	$ 74,000	$ 67,900
Percent of total revenue	61.40%	60.50%	61.50%	60.50%
EMEA
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,000	$ 3,600	$ 11,800	$ 10,200
Percent of total revenue	10.20%	9.50%	9.80%	9.10%
Reportable Geographical Components | Americas
Revenue from External Customer [Line Items]
Long-lived assets	$ 3,900		$ 3,900		4,400
Inventories, net	6,500		6,500		5,800
Reportable Geographical Components | Asia/Pacific
Revenue from External Customer [Line Items]
Long-lived assets	500		500		1,000
Inventories, net	5,500		5,500		5,700
Reportable Geographical Components | EMEA
Revenue from External Customer [Line Items]
Long-lived assets	0		0		0
Inventories, net	$ 1,900		$ 1,900		$ 1,300