SIGNIFICANT ACCOUNTING POLICIES - PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property and equipment
Assets in excess written off	$ 388	$ 0
Computers and peripheral equipment
Property and equipment
Property and equipment, depreciation rate (as a percent)	33.00%
Laboratory equipment | Minimum
Property and equipment
Property and equipment, depreciation rate (as a percent)	7.00%
Laboratory equipment | Maximum
Property and equipment
Property and equipment, depreciation rate (as a percent)	15.00%
Office furniture and equipment
Property and equipment
Property and equipment, depreciation rate (as a percent)	6.00%