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Share Capital (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Dec. 28, 2017
Dec. 06, 2017
Sep. 14, 2017
Jun. 05, 2017
May 09, 2017
Jan. 05, 2017
Dec. 27, 2016
Dec. 16, 2016
Nov. 28, 2016
May 02, 2016
Nov. 30, 2017
May 31, 2017
Sep. 30, 2014
Dec. 31, 2017
Dec. 31, 2016
Mar. 31, 2017
Oct. 08, 2015
Preferred stock, par value                           $ 0.01 $ 0.01    
Authorized capital stock                           221,000,000      
Common stock, shares authorized                           220,000,000 220,000,000    
Common stock, par value                           $ 0.01 $ 0.01    
Preferred stock, shares authorized                           1,000,000 1,000,000    
Common stock, shares issued                           29,880,289 15,848,136    
Common stock, shares outstanding                           29,880,289 15,848,136    
Preferred stock, shares issued                           4,001 9,736    
Preferred stock, shares outstanding                           4,001 9,736    
Reverse stock splits                 36,254,240                
Proceeds from issuance of shares                           $ 12,702    
Number of stock options granted                           4,081,357 1,447,223    
Weighted-average exercise price per share, granted                           $ 1.1 [1]    
Stock-based employee compensation                           $ 254 $ 675    
Number of option exercised                           (471,794)    
Loss on extinguishment of convertible note                           $ 2,364    
Repurchase of common stock                           $ 500      
Fair market value percentage                           25.00%      
Temporary equity value                           $ 500      
General and Administrative Expense [Member]                                  
Stock-based employee compensation                           253 676    
Number of shares issued for services, value                           $ (7,258)    
Microbot Israel [Member]                                  
Common stock, par value                 $ 0.01                
Loan bears interest rate                                 10.00%
Microbot Israel [Member] | General and Administrative Expense [Member]                                  
Stock-based employee compensation                           675      
Alpha Capital [Member]                                  
Preferred stock, par value               $ 0.01                  
Rights to acquire shares of common stock               9,736,000                  
Designated preferred stock               9,736                  
Number of shares issued during period               9,735,925                  
Common stock shares issued and outstanding reduced during the period               26,518,315                  
Board of Directors [Member]                                  
Number of stock options granted 990,543 190,475                              
Weighted-average exercise price per share, granted $ 1.02 $ 1.05                              
Stock option vested term 3 years 3 years                              
Board of Directors [Member] | General and Administrative Expense [Member]                                  
Stock-based employee compensation                           5      
Board of Directors [Member] | Microbot Israel [Member]                                  
Common stock, par value                   $ 0.001              
Number of stock options granted                   500,000     403,592        
Number of stock option granted as adjustment of reflect merger                   1,447,223     1,167,693        
Weighted-average exercise price per share, granted                   $ 1.35     $ 0.80        
Stock option merger retroactively adjusted exercise price per share                   $ 0.47     $ 0.28        
Hazel Gadot [Member]                                  
Number of stock options granted     1,812,721                            
Weighted-average exercise price per share, granted     $ 1.05                            
Hazel Gadot [Member] | General and Administrative Expense [Member]                                  
Stock-based employee compensation                           156      
Hezi Himelfarb [Member]                                  
Number of stock options granted     1,087,627                            
Weighted-average exercise price per share, granted     $ 1.29                            
Stock option vested term     3 years                            
Hezi Himelfarb [Member] | General and Administrative Expense [Member]                                  
Stock-based employee compensation                           92      
Employees [Member]                                  
Number of stock options granted 990,543                                
Employees and Directors [Member] | General and Administrative Expense [Member]                                  
Stock-based employee compensation                           $ 1      
Employees and Consultant [Member]                                  
Common stock, par value                     $ 0.001            
Number of option exercised                     471,794            
Advisors [Member] | Restricted Stock [Member]                                  
Common stock price per share                           $ 1.28      
Number of shares issued for services                           7,802,639      
Number of shares issued for services, value                           $ 10,000      
Advisors [Member] | General and Administrative Expense [Member] | Restricted Stock [Member]                                  
Stock-based employee compensation                           7,300      
Consultant [Member]                                  
Stock-based employee compensation                           $ 225      
Number of shares issued for services                           120,000      
Purchaser [Member]                                  
Number of common stock shares sold during the period           700,000                      
Common stock price per share           $ 5.00                      
Proceeds from issuance of shares           $ 3,500                      
Placement agent fee           $ 210                      
Investor [Member]                                  
Number of common stock shares sold during the period       3,750,000                          
Common stock price per share       $ 2.70                          
Proceeds from issuance of shares       $ 10,125                          
Placement agent fee       $ 922                          
Minimum [Member]                                  
Common stock, shares authorized                 200,000,000                
Minimum [Member] | Hazel Gadot [Member]                                  
Stock option vested term     3 years                            
Maximum [Member]                                  
Common stock, shares authorized                 220,000,000                
Maximum [Member] | Hazel Gadot [Member]                                  
Stock option vested term     5 years                            
Warrant [Member]                                  
Cashless exercise warrants                               768  
Common Stock [Member]                                  
Conversion of stock into shares                           8,990,000      
Cashless exercise warrants                               359  
Common stock, shares issued                           40,583,127      
Common stock, shares outstanding                           40,583,127      
Rights to acquire shares of common stock             9,735,925                    
Number of option exercised                           471,794      
Number of shares issued during period                           4,450,000      
Series A Convertible Preferred Stock [Member]                                  
Conversion of stock into shares                           8,990      
Preferred stock, shares issued                           4,001      
Preferred stock, shares outstanding                           4,001      
Series A Convertible Preferred Stock [Member]                                  
Preferred stock, par value                       $ 0.01     $ 0.01    
Conversion of stock into shares                       1,000     1,000    
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                        
Common Stock [Member]                                  
Cashless exercise warrants                               359  
Series A Preferred Shares [Member]                                  
Designated preferred stock             9,736                    
[1] Less than 1