CONCENTRATION OF RISK, Long-Lived Assets by Geographic Area (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) supplier	Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Total long-lived assets	$ 22,362	$ 22,407
Supplier Concentration Risk [Member]
Segment Reporting Information [Line Items]
Number of suppliers from which chemical materials were purchased | supplier	1
UNITED STATES
Segment Reporting Information [Line Items]
Total long-lived assets	$ 22,167	22,187
Other [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 195	$ 220