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SHAREHOLDERS' EQUITY (Ordinary Shares) (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended 22 Months Ended
Feb. 06, 2019
USD ($)
$ / shares
shares
May 08, 2018
USD ($)
$ / shares
shares
Jun. 02, 2017
USD ($)
$ / shares
shares
Aug. 11, 2016
USD ($)
$ / shares
shares
Nov. 22, 2017
USD ($)
$ / shares
shares
Jan. 23, 2017
USD ($)
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2016
shares
Dec. 31, 2018
₪ / shares
shares
Apr. 25, 2018
shares
Class of Stock [Line Items]                          
Exercise of warrants into ordinary shares | $             $ 5 $ 14 $ 117        
Exercise of options                        
Issuance of ordinary shares in the Private Placement, shares                   166,667      
Number of units                   25,000      
Issuance of ordinary shares in IPO, net of issuance expense | $             17,792        
Issuance of ordinary Shares in RD Offering | $ [1]                 5,259        
Proceeds warrant from the exercise pre-funded warrants | $             $ 196 117        
Private Placement [Member]                          
Class of Stock [Line Items]                          
Issuance expenses | $                        
Exercise of warrants                        
Value or warrants | $             $ 58,298 $ 125          
Exercise price | $ / shares             $ 0.60            
Issuance of ordinary shares in the Private Placement, net of issuance expenses | $             $ 10,900            
Warrants exercised on a cashless basis             22,501 9,912 34,508 82,348 34,508 22,501  
Stock issuance costs | $             $ 1,200            
Private Placement [Member] | ILS [Member]                          
Class of Stock [Line Items]                          
Exercise price | ₪ / shares                       ₪ 2.40  
IPO [Member]                          
Class of Stock [Line Items]                          
Issuance expenses | $             $ 2,381   $ 615 $ 2,945      
Shares issued   478,407                      
Exercise of options             25,624            
Exercise of warrants             56            
Share price | $ / shares   $ 5.50               $ 72.00      
Value or warrants | $             $ 49,229            
Number of units   2,738,472               166,667      
Issuance of ordinary shares in IPO, net of issuance expense | $   $ 20,200         10,800            
Stock issuance costs | $             $ 2,900            
IPO [Member] | Subsequent Event [Member]                          
Class of Stock [Line Items]                          
Shares issued 1,881,500                        
Share price | $ / shares $ 2.58                        
Over-Allotment Option [Member]                          
Class of Stock [Line Items]                          
Warrants issued                   37,500      
Pre funded Units [Member]                          
Class of Stock [Line Items]                          
Exercise of options   450,909                      
Share price | $ / shares   $ 5.49                      
Number of units   450,909                      
Exercise price | $ / shares   $ 0.01                      
Issuance of ordinary shares in IPO, net of issuance expense | $   $ 4,500                      
Pre funded Units [Member] | Subsequent Event [Member]                          
Class of Stock [Line Items]                          
Shares issued 1,024,876                        
Share price | $ / shares $ 2.57                        
Exercise price | $ / shares 0.01                        
Series C [Member]                          
Class of Stock [Line Items]                          
Shares issued   478,407                      
Series C [Member] | Subsequent Event [Member]                          
Class of Stock [Line Items]                          
Share price | $ / shares $ 0.50                        
Pre-funded Warrants [Member]                          
Class of Stock [Line Items]                          
Shares called by warrants           24,167     137,441   137,441    
Warrant outstanding               24,167   24,167  
Proceeds warrant from the registered direct offering | $           $ 14,500              
Pre-funded Warrants [Member] | Subsequent Event [Member]                          
Class of Stock [Line Items]                          
Exercise of warrants 1,024,876                        
Issuance of ordinary shares in IPO, net of issuance expense | $ $ 7,500                        
Stock issuance costs | $ 927                        
Pre-funded Warrants [Member] | RD Offering [Member]                          
Class of Stock [Line Items]                          
Share price | $ / shares       $ 22.80                  
Shares called by warrants       209,524                  
Price per unit | $ / shares       $ 22.20                  
Exercise price | $ / shares       $ 0.60                  
Issuance of ordinary Shares in RD Offering | $       $ 53,635                  
Expiry date       Aug. 11, 2023                  
Proceeds warrant from the registered direct offering | $       $ 5,900         $ 82,500        
Proceeds warrant from the exercise pre-funded warrants | $       $ 47,917                  
One-year warrants [Member] | RD Offering [Member]                          
Class of Stock [Line Items]                          
Share price | $ / shares     $ 24.00                    
Shares called by warrants     112,460                    
Price per unit | $ / shares     $ 25.50                    
Expiration of warrants                         13,574
Warrants exercised on a cashless basis                         56,812
Warrant outstanding             85,228         85,228  
Issuance of ordinary Shares in RD Offering | $     $ 112,460                    
Proceeds warrant from the registered direct offering | $     $ 2,690                    
Five-year warrants [Member] | RD Offering [Member]                          
Class of Stock [Line Items]                          
Share price | $ / shares         $ 13.20                
Shares called by warrants         142,042                
Price per unit | $ / shares         $ 15                
Issuance of ordinary Shares in RD Offering | $         $ 189,387                
Proceeds warrant from the registered direct offering | $         $ 2,500                
Anti-Dilutive Warrants [Member]                          
Class of Stock [Line Items]                          
Exercise of warrants                     56    
Warrants issued             32,174            
Shares called by warrants             7,246   14,969   14,969 7,246  
Anti-Dilutive Warrants [Member] | Ordinary Shares [Member]                          
Class of Stock [Line Items]                          
Exercise of warrants             7,724       7,724    
Long Term Incentive Warrants [Member]                          
Class of Stock [Line Items]                          
Exercise price | $ / shares                   $ 82.80      
Expiration of warrants             378,047 378,047 388,980   388,980 378,047  
Long Term Incentive Warrants [Member] | Private Placement [Member]                          
Class of Stock [Line Items]                          
Exercise price | $ / shares                   $ 82.80      
Credit Line Agreement Warrants [Member]                          
Class of Stock [Line Items]                          
Warrants issued                   221,556      
Exercise price | $ / shares                   $ 0.2      
Expiration of warrants             5,192 243 761   761 5,192  
Principal | $                   $ 12,000      
Expiration period                   10 years      
Warrant outstanding             7,389 35,082       7,389  
Underwriter Warrants [Member] | IPO [Member]                          
Class of Stock [Line Items]                          
Warrants issued                   8,334      
Exercise price | $ / shares                   $ 90      
Series A Warrants [Member] | Private Placement [Member]                          
Class of Stock [Line Items]                          
Warrants value | $                   $ 1,000      
Exercise price | $ / shares                   $ 90      
Series A Warrants [Member] | Over-Allotment Option [Member]                          
Class of Stock [Line Items]                          
Exercise of warrants                   6,250      
Ordinary Shares [Member] | Over-Allotment Option [Member]                          
Class of Stock [Line Items]                          
Exercise of warrants                   12,500      
Legal Warrants [Member] | IPO [Member]                          
Class of Stock [Line Items]                          
Warrants issued                   1,250      
Exercise price | $ / shares                   $ 60.72      
Series C Warrants [Member]                          
Class of Stock [Line Items]                          
Exercise price | $ / shares   $ 5.50                      
Pre-funded Warrants one [Member] | Subsequent Event [Member]                          
Class of Stock [Line Items]                          
Issuance of ordinary shares in IPO, net of issuance expense | $ $ 6,600                        
Series D Warrants [Member] | Subsequent Event [Member]                          
Class of Stock [Line Items]                          
Exercise price | $ / shares $ 2.58                        
[1] Represents warrants issued to placement agent as part of issuance expenses