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Share Capital (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 14, 2017
Jun. 05, 2017
May 26, 2017
May 12, 2017
May 11, 2017
May 09, 2017
Jan. 05, 2017
Dec. 27, 2016
Dec. 16, 2016
Nov. 28, 2016
Jun. 30, 2017
May 31, 2017
Sep. 30, 2014
Sep. 20, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Mar. 31, 2017
May 02, 2016
Oct. 08, 2015
Preferred stock, value                             $ 0.01   $ 0.01   $ 0.01      
Authorized capital stock                             221,000,000   221,000,000          
Common stock, shares authorized                             220,000,000   220,000,000   220,000,000      
Common stock, par value                             $ 0.01   $ 0.01   $ 0.01      
Preferred stock, shares authorized                             1,000,000   1,000,000   1,000,000      
Common stock, shares issued                             26,302,495   26,302,495   15,848,136      
Common stock, shares outstanding                             26,302,495   26,302,495   15,848,136      
Preferred stock, shares issued                             7,037   7,037   9,736      
Preferred stock, shares outstanding                             7,037   7,037   9,736      
Reverse stock splits                   36,254,240                        
Common stock price per share                             $ 1.28   $ 1.28          
Proceeds from issuance of shares                             $ 12,704        
Number of stock options granted                                 1,812,712   1,447,223      
Weighted-average exercise price per share, granted                                 $ 1.05   [1]      
Loss on extinguishment of convertible note                             $ (2,364)        
Repurchase of common stock                             $ 500   $ 500          
Fair market value percentage                             25.00%   25.00%          
Temporary equity value                                 $ 500          
General and Administrative Expense [Member]                                            
Stock-based employee compensation                                 $ 22 $ 675        
Microbot Israel [Member]                                            
Common stock, par value                   $ 0.01                        
Loan bears interest rate                                           10.00%
Alpha Capital [Member]                                            
Rights to acquire shares of common stock                 9,735,925                          
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] | Microbot Israel [Member]                                            
Common stock, par value                                         $ 0.001  
Number of stock options granted                         403,592                  
Number of stock option granted as adjustment of reflect merger                         1,167,693                  
Weighted-average exercise price per share, granted                         $ 0.80                  
Stock option merger retroactively adjusted exercise price per share                         $ 0.28                  
Hazel Gadot [Member]                                            
Number of stock options granted 1,812,721                                          
Weighted-average exercise price per share, granted $ 1.05                                          
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                                          
Advisors [Member] | Restricted Stock [Member]                                            
Common stock price per share                             $ 1.28   $ 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] | General and Administrative Expense [Member]                                            
Number of shares issued for services     50,000                                      
Number of shares issued for services, value     $ 154                                      
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                     2,554,000     2,700,000     5,954,000          
Cashless exercise warrants                                       359    
Common stock, shares issued                             37,005,333   37,005,333          
Common stock, shares outstanding                             37,005,333   37,005,333          
Rights to acquire shares of common stock               9,735,925                            
Number of shares issued during period       700,000 700,000                       4,450,000          
Series A Convertible Preferred Shares [Member]                                            
Preferred stock, value                       $ 0.01             $ 0.01      
Conversion of stock into shares         700           2,554 1,000   2,700         1,000      
Series A Convertible Preferred Shares [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 Shares [Member] | Alpha Capital [Member] | Securities Purchase Agreement [Member]                                            
Number of shares issued during period           3,254                                
Common Stock [Member]                                            
Cashless exercise warrants                                       359    
Series A Preferred Shares [Member]                                            
Designated preferred stock               9,736                            
[1] Less than 1