NATURE OF OPERATIONS AND GOING CONCERN (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
NATURE OF OPERATIONS AND GOING CONCERN
Cash and cash equivalents	$ 20,194	$ 13,459	$ 13,980	$ 12,825
Going Concern
Accumulated loss	(133,569)	(100,255)
Net loss	(33,314)	(18,346)	(38,756)
Cash used in operations	(16,329)	(15,284)	(14,906)
Cash balance	$ 20,194	$ 13,459	$ 13,980	$ 12,825