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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jan. 05, 2018
Jun. 30, 2021
Jun. 30, 2020
Government and Other Grants [Line Items]      
Contingent fees   $ 0 $ 500
Amount incurred milestone payments   0 $ 52
Collaboration Agreement With U.S. Antibody Company [Member]      
Government and Other Grants [Line Items]      
Amount incurred milestone payments   $ 150  
May 2012 Agreement With Advisor [Member]      
Government and Other Grants [Line Items]      
Agreement, start date   May 09, 2012  
Agreement termination description   In 2014, the May 2012 Agreement was terminated, except with respect to certain payments arising from the Bayer Agreement which survive termination until August 5, 2025.  
Commercial License Agreement [Member]      
Government and Other Grants [Line Items]      
Percentage of royalties on net sales 1.00%    
Minimum [Member] | May 2012 Agreement With Advisor [Member]      
Government and Other Grants [Line Items]      
Participation Rights   4.00%  
Government and Other Grants [Member]      
Government and Other Grants [Line Items]      
Maximum royalty repaid as percentage of grant received   100.00%  
Contingent royalty obligations   $ 9,540  
Government and Other Grants [Member] | Minimum [Member]      
Government and Other Grants [Line Items]      
Royalty percentage based on future revenues   3.00%  
Government and Other Grants [Member] | Maximum [Member]      
Government and Other Grants [Line Items]      
Royalty percentage based on future revenues   5.00%  
Office leases [Member] | Israel [Member]      
Government and Other Grants [Line Items]      
Bank guarantees in favor of lessor, foreign currency derivative contracts and credit card security   $ 672