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SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Schedule of Depreciation Rates for Property and Equipment
Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets at the following annual rates:

 
%
   
Computers, software and related equipment
33
Laboratory equipment and office furniture
6 - 20 (mainly 20)
Leasehold improvements
Shorter of the term of the lease or useful life
Schedule of weighted-average assumptions for granted options
The Company used the following weighted-average assumptions for options granted to employees and directors:

   
Year ended December 31,
  
   
2019
    
2018
    
2017
  
                   
Volatility
    
54.29
%
    
53.21
%
    
50.7
%
Risk-free interest rate
    
1.96
%
    
2.9
%
    
1.86
%
Dividend yield
    
0
%
    
0
%
    
0
%
Expected life (years)
    
5.0
      
4.9
      
4.8