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Share Capital (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 24, 2018
Apr. 10, 2018
Feb. 28, 2018
Dec. 28, 2017
Dec. 06, 2017
Sep. 14, 2017
Jun. 05, 2017
May 09, 2017
Jan. 05, 2017
Dec. 27, 2016
Dec. 16, 2016
May 02, 2016
Nov. 30, 2017
May 31, 2017
Sep. 30, 2014
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Mar. 31, 2017
Nov. 28, 2016
Oct. 08, 2015
Preferred stock, par value                               $ 0.01   $ 0.01   $ 0.01 $ 0.01      
Authorized capital stock                               221,000,000   221,000,000   221,000,000        
Common stock, shares authorized                               220,000,000   220,000,000   220,000,000 220,000,000      
Ordinary shares, par value                               $ 0.01   $ 0.01   $ 0.01 $ 0.01      
Preferred stock, shares authorized                               1,000,000   1,000,000   1,000,000 1,000,000      
Common stock, shares issued, including temporary equity                               2,837,863   2,837,863            
Common stock, shares outstanding, including temporary equity                               2,837,863   2,837,863            
Preferred stock, shares issued                               1,001   1,001   4,001 9,736      
Preferred stock, shares outstanding                               1,001   1,001   4,001 9,736      
Proceeds from issuance of shares                               $ 9,414 $ 12,704 $ 12,702      
Number of stock options granted [1]                                     272,090 [2] 96,482 [2]      
Weighted-average exercise price per share, granted [1]                                     $ 16.5 [2] [2],[3]      
Stock-based employee compensation                                   $ 822   $ 254 $ 675      
Number of option exercised [1]                                   2,487   31,453 [2] [2]      
Number of shares issued during period                                              
Loss on extinguishment of convertible note                               $ 2,364 2,364 $ 2,364      
Repurchase of common stock                               $ 500   $ 500   $ 500        
Fair market value percentage                               25.00%   25.00%   25.00%        
Temporary equity value                                   $ 500   $ 500        
Minimum [Member]                                                
Common stock, shares authorized                                             200,000,000  
Maximum [Member]                                                
Common stock, shares authorized                                             220,000,000  
General and Administrative Expense [Member]                                                
Stock-based employee compensation                                       253 676      
Number of shares issued for services, value                                       $ 7,258      
Microbot Israel [Member]                                                
Ordinary shares, par value                                             $ 0.01  
Loan bears interest rate                                               10.00%
Microbot Israel [Member] | General and Administrative Expense [Member]                                                
Stock-based employee compensation                                   675   675        
CardioSert Ltd [Member]                                                
Number of common shares issued for acquisition 6,738 6,738                                            
CardioSert Ltd [Member] | Research and Development Expense [Member]                                                
Stock-based employee compensation $ 74                                              
Alpha Capital [Member]                                                
Preferred stock, par value                     $ 0.01                          
Rights to acquire shares of common stock                     655,967                          
Designated preferred stock                     9,736                          
Number of shares issued during period                     655,967                          
Common stock shares issued and outstanding reduced during the period                     1,786,684                          
Board of Directors [Member]                                                
Ordinary shares, par value                       $ 0.001                        
Number of stock options granted       66,036 12,698                                      
Weighted-average exercise price per share, granted       $ 15.3 $ 15.75                                      
Stock option vested term       3 years 3 years                                      
Board of Directors [Member] | General and Administrative Expense [Member]                                                
Stock-based employee compensation                                   41 0 5        
Board of Directors [Member] | Microbot Israel [Member]                                                
Ordinary shares, par value                       $ 0.001                        
Number of stock options granted                       33,333     26,906                  
Number of stock option granted as adjustment of reflect merger                       96,482     77,846                  
Weighted-average exercise price per share, granted                       $ 20.25     $ 12                  
Stock option merger retroactively adjusted exercise price per share                       $ 7.05     $ 4.2                  
Harel Gadot [Member]                                                
Number of stock options granted           120,848                                    
Weighted-average exercise price per share, granted           $ 15.75                                    
Harel Gadot [Member] | Minimum [Member]                                                
Stock option vested term           3 years                                    
Harel Gadot [Member] | Maximum [Member]                                                
Stock option vested term           5 years                                    
Harel Gadot [Member] | General and Administrative Expense [Member]                                                
Stock-based employee compensation                                   339 0 156        
Hezi Himelfarb [Member]                                                
Number of stock options granted           72,508                                    
Weighted-average exercise price per share, granted           $ 19.35                                    
Stock option vested term           3 years                                    
Hezi Himelfarb [Member] | General and Administrative Expense [Member]                                                
Stock-based employee compensation                                   231 0 92        
Employees [Member]                                                
Ordinary shares, par value     $ 0.001                                          
Number of stock options granted       66,036                                        
Number of option exercised     2,487                                          
Employees and Directors [Member] | General and Administrative Expense [Member]                                                
Stock-based employee compensation                                   211 211 $ 95        
Employees and Directors [Member] | Research and Development Expense [Member]                                                
Stock-based employee compensation                                   $ 0 $ 0          
Employees and Consultant [Member]                                                
Number of option exercised                         31,453                      
Employees and Consultant [Member] | NIS [Member]                                                
Ordinary shares, par value                         $ 0.001                      
Advisors [Member] | Restricted Stock [Member]                                                
Common stock price per share                               $ 19.2   $ 19.2   $ 19.2        
Number of shares issued for services                                   525,706   525,706        
Number of shares issued for services, value                                   $ 10,000   $ 10,000        
Advisors [Member] | General and Administrative Expense [Member] | Restricted Stock [Member]                                                
Stock-based employee compensation                                   $ 7,300   7,300        
Consultant [Member]                                                
Stock-based employee compensation                                       $ 225        
Number of shares issued for services                                       8,085        
Purchaser [Member]                                                
Number of common stock shares sold during the period                 47,163                              
Common stock price per share                 $ 74                              
Proceeds from issuance of shares                 $ 3,500                              
Placement agent fee                 $ 210                              
Investor [Member]                                                
Number of common stock shares sold during the period             252,658                                  
Common stock price per share             $ 40                                  
Proceeds from issuance of shares             $ 10,125                                  
Placement agent fee             $ 922                                  
Before Reverse Split [Member]                                                
Common stock, shares issued, including temporary equity                               42,120,127   42,120,127            
Common stock, shares outstanding, including temporary equity                               42,120,127   42,120,127            
Before Reverse Split [Member] | CardioSert Ltd [Member]                                                
Number of common shares issued for acquisition 100,000 100,000                                            
Before Reverse Split [Member] | Alpha Capital [Member]                                                
Rights to acquire shares of common stock                     9,736,000                          
Number of shares issued during period                     9,735,925                          
Common stock shares issued and outstanding reduced during the period                     26,518,315                          
Before Reverse Split [Member] | Board of Directors [Member]                                                
Number of stock options granted       990,543 190,475                                      
Weighted-average exercise price per share, granted       $ 1.02 $ 1.05                                      
Before Reverse Split [Member] | Board of Directors [Member] | Microbot Israel [Member]                                                
Number of stock options granted                       500,000     403,592                  
Number of stock option granted as adjustment of reflect merger                       96,482     77,846                  
Weighted-average exercise price per share, granted                       $ 1.35     $ 0.8                  
Stock option merger retroactively adjusted exercise price per share                       $ 7.05     $ 4.2                  
Before Reverse Split [Member] | Harel Gadot [Member]                                                
Number of stock options granted           1,812,721                                    
Weighted-average exercise price per share, granted           $ 1.05                                    
Before Reverse Split [Member] | Hezi Himelfarb [Member]                                                
Number of stock options granted           1,087,627                                    
Weighted-average exercise price per share, granted           $ 1.29                                    
Before Reverse Split [Member] | Employees [Member]                                                
Number of stock options granted       990,543                                        
Number of option exercised     37,300                                          
Before Reverse Split [Member] | Employees and Consultant [Member]                                                
Number of option exercised                         471,794                      
Before Reverse Split [Member] | Advisors [Member] | Restricted Stock [Member]                                                
Common stock price per share                               $ 1.28   $ 1.28   $ 1.28        
Number of shares issued for services                                   7,802,639   7,802,639        
Before Reverse Split [Member] | Consultant [Member]                                                
Number of shares issued for services                                       120,000        
Before Reverse Split [Member] | Purchaser [Member]                                                
Number of common stock shares sold during the period                 700,000                              
Common stock price per share                 $ 5.00                              
Before Reverse Split [Member] | Investor [Member]                                                
Number of common stock shares sold during the period             3,750,000                                  
Common stock price per share             $ 2.70                                  
Warrant [Member]                                                
Cashless exercise warrants                                 52   52     51    
Warrant [Member] | Before Reverse Split [Member]                                                
Cashless exercise warrants                                 768   768     768    
Series A Convertible Preferred Stock [Member]                                                
Conversion of stock into shares                                   3,000   8,990        
Preferred stock, shares issued                               2,464   2,464   4,001        
Preferred stock, shares outstanding                               2,464   2,464   4,001        
Common Stock [Member]                                                
Conversion of stock into shares [4]                                   202,151   605,705 [5]        
Cashless exercise warrants                                           24    
Rights to acquire shares of common stock                   655,962                            
Number of option exercised [4]                                   2,487   31,787 [5]        
Number of shares issued during period [4],[5]                                       299,815        
Common Stock [Member] | Directors [Member]                                                
Number of stock options granted         12,698                                      
Common Stock [Member] | Employees [Member]                                                
Number of stock options granted       66,036                                        
Common Stock [Member] | Before Reverse Split [Member]                                                
Conversion of stock into shares                                       8,990,000        
Cashless exercise warrants                                           359    
Rights to acquire shares of common stock                   9,735,925                            
Series A Convertible Preferred Stock [Member]                                                
Preferred stock, par value                           $ 0.01             $ 0.01      
Conversion of stock into shares                           1,000       202,151   8,990 1,000      
Designated preferred stock                   656                            
Series A Convertible Preferred Stock [Member] | Securities Purchase Agreement [Member]                                                
Loan bears interest rate               6.00%                                
Debt maturity date               Nov. 28, 2016                                
Debt instrument face amount               $ 2,029                                
Series A Convertible Preferred Stock [Member] | Alpha Capital [Member] | Securities Purchase Agreement [Member]                                                
Number of shares issued during period               3,254                                
Loss on extinguishment of convertible note               $ 2,360                                
Series A Convertible Preferred Stock [Member] | Before Reverse Split [Member]                                                
Conversion of stock into shares                           1,000       3,000,000     1,000      
Designated preferred stock                   9,736                            
Common Stock [Member]                                                
Cashless exercise warrants                                 24   24     24    
Common Stock [Member] | Before Reverse Split [Member]                                                
Cashless exercise warrants                                 359   359     359    
[1] Share data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
[2] December 31 2017 and 2016 options data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
[3] Less than 1
[4] Share data represents the number of shares adjusted to retroactively reflect the 1:15 reverse Stock Split effected on September 4, 2018, as discussed in Note 1.
[5] December 31 2017, 2016 and 2015 share data represent the number of shares adjusted to retroactively reflect the 1:15 reverse Stock Split effected on September 4, 2018, as discussed in Note 1.