TAXES ON INCOME (Schedule of Components of Income Tax) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Current tax expenses (benefit) $ 655 $ 116 $ 35
Deferred tax expenses (benefit) (23) (127) 49
Current Income Tax Expense (Benefit), Total $ 632 $ (11) $ 84