CONCENTRATION OF RISK, Long-Lived Assets by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 supplier	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total long-lived assets	14,893	$ 19,922
Supplier Concentration Risk [Member]
Segment Reporting Information [Line Items]
Number of suppliers from which chemical materials were purchased	1
UNITED STATES
Segment Reporting Information [Line Items]
Total long-lived assets	14,660	19,763
Other [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	233	$ 159