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COMMITMENTS AND CONTINGENT LIABILITIES (Royalty Commitments) (Details) - Royalty Commitment with the Office of the Chief Scientist [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Unrecorded Unconditional Purchase Obligation [Line Items]      
Contingent royalty liabilities $ 8,289    
Royalty [Member]      
Unrecorded Unconditional Purchase Obligation [Line Items]      
Royalties included in cost of revenue $ 66 $ 92 $ 112
Minimum [Member]      
Unrecorded Unconditional Purchase Obligation [Line Items]      
Royalty percentage 3.00%    
Total royalties as a percent of grants received 100.00%    
Maximum [Member]      
Unrecorded Unconditional Purchase Obligation [Line Items]      
Royalty percentage 5.00%    
Total royalties as a percent of grants received 150.00%