ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration Risk (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Concentration Risk [Line Items]
Sales by product	$ 90,938	$ 85,492
% of total net sales	50.40%	47.40%
Advanced Ambrotose ®
Concentration Risk [Line Items]
Sales by product	$ 55,863	$ 59,026
% of total net sales	31.00%	32.70%
Ambrotose ®
Concentration Risk [Line Items]
Sales by product	$ 10,196	$ 9,686
% of total net sales	5.60%	5.40%
NutriVerus ™
Concentration Risk [Line Items]
Sales by product	$ 7,724	$ 8,541
% of total net sales	4.30%	4.70%
PLUS ™
Concentration Risk [Line Items]
Sales by product	$ 7,935	$ 8,239
% of total net sales	4.40%	4.60%
TruHealth
Concentration Risk [Line Items]
Sales by product	$ 9,220	$ 0
% of total net sales	5.10%	0.00%