ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration Risk (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Sales by product	$ 88,910	$ 96,238
% of total net sales	56.50%	55.60%
Abrotose Life [Member] [Member] | Product Concentration Risk
Concentration Risk [Line Items]
Sales by product	$ 34,975	$ 18,824
% of total net sales	22.20%	10.90%
Advanced Ambrotose [Member] | Product Concentration Risk
Concentration Risk [Line Items]
Sales by product	$ 22,390	$ 44,054
% of total net sales	14.20%	25.40%
Advanced Ambrotose® | Product Concentration Risk
Concentration Risk [Line Items]
Sales by product	$ 16,193	$ 17,537
% of total net sales	10.30%	10.10%
Manapol® Powder | Product Concentration Risk
Concentration Risk [Line Items]
Sales by product	$ 8,793	$ 8,636
% of total net sales	5.60%	5.00%
GI-Pro Balance | Product Concentration Risk
Concentration Risk [Line Items]
Sales by product	$ 6,559	$ 7,187
% of total net sales	4.20%	4.20%