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Share Capital (Narrative) (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 7 Months Ended 12 Months Ended
Mar. 15, 2021
USD ($)
Apr. 30, 2021
USD ($)
Mar. 23, 2021
USD ($)
$ / shares
shares
May 30, 2020
USD ($)
Nov. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
shares
May 30, 2020
₪ / shares
shares
Nov. 30, 2019
₪ / shares
shares
Sep. 30, 2019
₪ / shares
shares
Sale Of Stock [Line Items]                        
Options to purchase ADS cancelled               1,712,275 10,804      
2015 plan [Member]                        
Sale Of Stock [Line Items]                        
Number of ADSs issued               73,776        
Number of stock option ADSs reversed for issuance               1,422,153        
Number of ADSs options issuable outstanding               1,326,723        
Number of ADSs vested and exercisable               452,230        
Weighted average exercise price | $ / shares               $ 2.75        
Options to purchase ADS cancelled               35,653        
Series C Preferred Stock [Member]                        
Sale Of Stock [Line Items]                        
Preferred shares issued                   34,130   130,831
Preferred shares par value | ₪ / shares                   ₪ 0.01   ₪ 0.01
Proceeds from preferred shares | $       $ 3,000 $ 500 $ 11,484            
Investors [Member]                        
Sale Of Stock [Line Items]                        
Proceeds from exercise of warrants | $             $ 1,250          
Investors [Member] | Series C Preferred Stock [Member]                        
Sale Of Stock [Line Items]                        
Preferred shares issued                     34,130  
Preferred shares par value | ₪ / shares                     ₪ 0.01  
Proceeds from preferred shares | $         $ 3,000              
The Private Placement [Member]                        
Sale Of Stock [Line Items]                        
Proceeds from sale of ADS's | $ $ 45,500   $ 4,500                  
Number of ADSs issued     261,929                  
Number of warrants purchase ADS's     2,619,270                  
Share price per share | $ / shares     $ 17.35                  
ATM agreement [Member]                        
Sale Of Stock [Line Items]                        
Proceeds from sale of ADS's | $   $ 75,000           $ 15,917        
Number of ADSs issued               699,806        
Share price per share | $ / shares               $ 22.75