ORGANIZATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) segment	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	May 30, 2014 patent
Organization
Number of reportable segments | segment			1
Accumulated deficit	$ 355,757		$ 355,757		$ 343,591
Net loss	2,388	$ 3,044	12,166	$ 6,694
Cash	$ 14,041	$ 9,835	$ 14,041	$ 9,835	$ 22,978	$ 14,581
CTRM Business
Organization
Number of patents and patents applications acquired | patent							250