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SHARE CAPITAL (Tables)
12 Months Ended
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Effect of Share-based Compensation Statements of Operations
The following table illustrates the effect of share-based compensation on the statements of operations:

   
Year ended
December 31
 
   
2018
   
2019
   
2020
 
Research and development expenses
 
$
2,708
   
$
1,028
   
$
431
 
General and administrative expenses
 
$
1,946
   
$
1,524
   
$
786
 
   
$
4,654
   
$
2,552
   
$
1,217
 
Employees [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Assumptions Used to Estimate Fair Value
The fair value of options granted to employees and directors in 2018 and 2019 were $878 and $485 respectively. The underlying data used for computing the fair value of the options are as follows:

 
2018
 
2019
 
Value of one ordinary share
$6.24-$10.40
 
$6.08-$8.59
 
Dividend yield
0%
 
0%
 
Expected volatility
70.43 %-73.35%
 
74.87%-77.83 %
 
Risk-free interest rate
2.67%-2.83%
 
1.82%-2.75%
 
Expected term
5.50-7 years
 
6.11 years
 
Schedule of Stock Option Activity
The following table summarizes the number of options granted to employees under the Plan for the years ended December 31, 2019 and 2020, and related information:

   
Year ended December 31
 
   
2019
   
2020
 
   
Number of options
   
Weighted average exercise price
   
Weighted average remaining contractual life
   
Number of options
   
Weighted average exercise price
   
Weighted average remaining contractual life
 
Options outstanding at the beginning of the year
   
938,090
   
$
4.47
     
7.89
     
1,031,591
   
$
4.74
     
7.25
 
Granted
   
95,300
   
$
6.24
     
9.17
     
-
     
-
     
-
 
Exercised
   
-
     
-
     
-
     
(28,447
)
 
$
5.27
     
-
 
Expired
   
(563
)
 
$
5.57
     
-
     
-
     
-
     
-
 
Forfeited
   
(1,238
)
 
$
5.57
     
-
     
(2,250
)
 
$
7.77
     
-
 
Options outstanding at the end of the year
   
1,031,591
   
$
4.74
     
7.25
     
1,000,894
   
$
4.63
     
6.05
 
Options exercisable at the end of the year
   
683,979
   
$
3.60
     
6.56
     
900,687
   
$
4.08
     
5.67
 
Non Employees Member [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Assumptions Used to Estimate Fair Value
The fair value of options granted to non-employees in 2018 was $648. The underlying data used for computing the fair value of the options are as follows:

   
2018
 
Value of one ordinary share
 
$ 10.40
 
Dividend yield
 
0%
 
Expected volatility
 
79.07%
 
Risk-free interest rate
 
2.86%
 
Expected term
 
10 years
 
Schedule of Stock Option Activity
The following table summarizes the number of options granted to non-employees under the Plan for the year ended December 31, 2019 and 2020, and related information:

   
Year ended December 31
 
   
2019
   
2020
 
   
Number of options
   
Weighted average exercise price
   
Weighted average remaining contractual life
   
Number of options
   
Weighted average exercise price
   
Weighted average remaining contractual life
 
Options outstanding at the beginning of the year
   
198,575
   
$
7.48
     
8.81
     
198,575
   
$
7.48
     
7.84
 
Granted
   
-
     
-
     
-
     
-
     
-
     
-
 
Options outstanding at the end of the year
   
198,575
   
$
7.48
     
7.84
     
198,575
   
$
7.70
     
6.84
 
Options exercisable at the end of the year
   
96,588
   
$
6.97
     
7.78
     
137,771
     
7.34
     
6.8