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Share Capital (Details Narrative) (10-K) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
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
Nov. 28, 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
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    
Common stock, 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                             2,224,569 [1]   2,224,569 [1]   2,013,193 [2],[3] 1,067,777 [2]    
Common stock, shares outstanding                             2,224,569 [1]   2,224,569 [1]   2,013,193 [1],[2] 1,067,777 [2]    
Preferred stock, shares issued                             1,001   1,001   4,001 9,736    
Preferred stock, shares outstanding                             1,001   1,001   4,001 9,736    
Reverse stock splits                   2,442,646                        
Proceeds from issuance of shares                             $ 9,414 $ 12,704 $ 12,702    
Number of stock options granted [4]                                   272,090 [5] 96,482 [5]    
Weighted-average exercise price per share, granted [4]                                   $ 16.5 [5] [5],[6]    
Stock-based employee compensation                                 $ 822   $ 254 $ 675    
Number of option exercised [4]                                 2,487   31,453 [5] [5]    
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      
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   675      
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]                                            
Common stock, 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]                                            
Common stock, 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] | 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]                                            
Common stock, 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 Consultant [Member]                                            
Number of option exercised                       31,453                    
Employees and Consultant [Member] | NIS [Member]                                            
Common stock, 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                                  
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                               52   52     51  
Common Stock [Member]                                            
Conversion of stock into shares [1]                                 202,151   605,705 [7]      
Cashless exercise warrants                                         24  
Common stock, shares issued                                     2,734,300      
Common stock, shares outstanding                                     2,734,300      
Rights to acquire shares of common stock               655,962                            
Number of option exercised [1]                                 2,487   31,787 [7]      
Number of shares issued during period [1],[7]                                     299,815      
Common Stock [Member] | Employees [Member]                                            
Number of stock options granted   66,036                                        
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      
Before Reverse Split [Member]                                            
Reverse stock splits                   36,254,240                        
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                                  
Before Reverse Split [Member] | Warrant [Member]                                            
Cashless exercise warrants                               768   768     768  
Before Reverse Split [Member] | 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                            
Series A Convertible Preferred Stock [Member]                                            
Preferred stock, par value                         $ 0.01             $ 0.01    
Conversion of stock into shares                         67             67    
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                            
Number of common stock shares converted upon conversion                                     605,705      
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                            
Number of common stock shares converted upon conversion                                     8,990,000      
Common Stock [Member]                                            
Cashless exercise warrants                               24   24     24  
Common Stock [Member] | Before Reverse Split [Member]                                            
Cashless exercise warrants                               359   359     359  
Series A Preferred Shares [Member]                                            
Designated preferred stock               9,736                            
[1] 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.
[2] December 31 2017 and 2016 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.
[3] Share data represents the number of shares adjusted to retroactively reflect the 1:15 reverse Stock Split effected on September 4, 2018.
[4] Share data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
[5] 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.
[6] Less than 1
[7] 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.