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Share Capital (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 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
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
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    
Ordinary shares, par value                           $ 0.01   $ 0.01    
Preferred stock, shares authorized                           1,000,000   1,000,000    
Common stock, shares issued, including temporary equity                           42,120,127        
Common stock, shares outstanding, including temporary equity                           42,120,127        
Preferred stock, shares issued                           2,464   4,001    
Preferred stock, shares outstanding                           2,464   4,001    
Reverse stock splits                 36,254,240                  
Proceeds from issuance of shares                           $ 3,290      
Number of stock options granted                             4,081,357    
Weighted-average exercise price per share, granted                             $ 1.1    
Stock-based employee compensation                           $ 416   $ 254    
Number of option exercised                               (471,794)    
Loss on extinguishment of convertible note                           2,360        
Repurchase of common stock                           $ 500        
Fair market value percentage                           25.00%        
Temporary equity value                           $ 500        
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        
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                           15 0      
Board of Directors [Member] | Microbot Israel [Member]                                    
Ordinary shares, 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          
Harel Gadot [Member]                                    
Number of stock options granted     1,812,721                              
Weighted-average exercise price per share, granted     $ 1.05                              
Harel Gadot [Member] | General and Administrative Expense [Member]                                    
Stock-based employee compensation                           219 0      
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                           108 0      
Employees and Directors [Member] | General and Administrative Expense [Member]                                    
Stock-based employee compensation                           71 71      
Employees and Directors [Member] | Research and Development Expense [Member]                                    
Stock-based employee compensation                           $ 0 $ 0      
Employees and Consultant [Member]                                    
Number of option exercised                     471,794              
Employees and Consultant [Member] | NIS [Member]                                    
Ordinary shares, par value                     $ 0.001              
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] | Harel Gadot [Member]                                    
Stock option vested term     3 years                              
Maximum [Member]                                    
Common stock, shares authorized                 220,000,000                  
Maximum [Member] | Harel Gadot [Member]                                    
Stock option vested term     5 years                              
Warrant [Member]                                    
Cashless exercise warrants                             768      
Common Stock [Member]                                    
Conversion of stock into shares                           1,537,300   8,990,000    
Cashless exercise warrants                             359      
Rights to acquire shares of common stock             9,735,925                      
Designated preferred stock             9,736                      
Number of option exercised                               471,794    
Number of shares issued during period                               4,450,000    
Common Stock [Member] | Directors [Member]                                    
Number of stock options granted   190,475                                
Common Stock [Member] | Employees [Member]                                    
Number of stock options granted 990,543                                  
Series A Convertible Preferred Stock [Member]                                    
Conversion of stock into shares                           1,537   8,990    
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