STOCK-BASED COMPENSATION (Equity Based Compensation Schedule) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Allocation of stock-based compensation expense
Stock compensation expense	$ 440	$ 302	$ 814	$ 675
Research and development expenses | Employees
Allocation of stock-based compensation expense
Stock compensation expense	182	131	345	307
Research and development expenses | Non-employees
Allocation of stock-based compensation expense
Stock compensation expense	7	2	10	19
General and administrative expenses | Employees and directors
Allocation of stock-based compensation expense
Stock compensation expense	231	168	428	328
General and administrative expenses | Non-employees
Allocation of stock-based compensation expense
Stock compensation expense	$ 20	$ 1	$ 31	$ 21