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Share Capital (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands																	1 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended
		Aug. 12, 2019	Jan. 23, 2019	Jan. 21, 2019	Jan. 15, 2019	Jan. 14, 2019	Aug. 13, 2018	May 24, 2018	Apr. 10, 2018	Dec. 28, 2017	Dec. 06, 2017	Sep. 14, 2017	Jun. 05, 2017	Jan. 05, 2017	Dec. 27, 2016	May 02, 2016	Feb. 28, 2018	Nov. 30, 2017	Sep. 30, 2014	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Sep. 10, 2019	Jan. 02, 2019
Authorized capital stock																				61,000,000		61,000,000			221,000,000
Common stock, shares authorized																				60,000,000		60,000,000		60,000,000	220,000,000
Common stock, shares issued																				4,307,666		4,307,666		3,012,343
Common stock, shares outstanding																				4,307,666		4,307,666		3,012,343
Proceeds from issuance of shares																						$ 9,562
Number of stock options granted																						29,133		10,000
Weighted-average exercise price per share, granted																						$ 7.00		$ 9.00
Ordinary shares, par value																				$ 0.01		$ 0.01		$ 0.01
Stock-based employee compensation																				$ 296	$ 317	$ 906	1,139
Number of option exercised																								2,487
Repurchase of common stock																						$ 500
Fair market value percentage																				25.00%		25.00%
Temporary equity value																						$ 500
Accumulated Deficit [Member]
Cumulative effect adjustment																										$ 20
Purchaser [Member]
Number of common stock shares sold during the period														47,163
Common stock price per share														$ 74.00
Proceeds from issuance of shares														$ 3,500
Placement agent fee and expenses														$ 210
Investor [Member]
Number of common stock shares sold during the period													252,652
Common stock price per share													$ 40.50
Proceeds from issuance of shares													$ 10,125
Placement agent fee and expenses													$ 922
Investor [Member] | Securities Purchase Agreement [Member]
Number of common stock shares sold during the period			250,000		590,000	330,000
Common stock price per share			$ 9.875		$ 10.00	$ 6.50
Proceeds from issuance and sale of stock			$ 2,470		$ 5,900
Board of Directors [Member]
Number of stock options granted				11,630							12,698
Weighted-average exercise price per share, granted				$ 8.60							$ 15.75
Stock option vested term				3 years							3 years
Board of Directors [Member] | General and Administrative Expense [Member]
Stock-based employee compensation																				$ 13	14	40	55
Board of Directors [Member] | NIS [Member]
Ordinary shares, par value																$ 0.001
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																				122	121	362	460
Harel Gadot [Member] | Minimum [Member]
Stock option vested term												3 years
Harel Gadot [Member] | Maximum [Member]
Stock option vested term												5 years
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] | Research and Development Expense [Member]
Stock-based employee compensation																				108	98	322	329
Employees [Member]
Number of stock options granted		17,503								66,036
Weighted-average exercise price per share, granted		$ 5.95								$ 15.3
Ordinary shares, par value																	$ 0.001
Stock option vested term		3 years								3 years
Stock-based employee compensation																				4	0	4	0
Number of option exercised																	2,487
Employees [Member] | Research and Development Expense [Member]
Stock-based employee compensation																				37	62	116	273
Employees and Consultant [Member]
Number of option exercised																		31,453
Employees and Consultant [Member] | NIS [Member]
Ordinary shares, par value																		$ 0.001
Non-Executive Officer [Member]
Number of stock options granted							10,000
Weighted-average exercise price per share, granted							$ 9
Stock option vested term							3 years
Non-Executive Officer [Member] | Research and Development Expense [Member]
Stock-based employee compensation																				6	22	24	22
Board of Directors [Member]
Stock-based employee compensation																				$ 7	$ 0	$ 37	$ 0
Microbot Israel [Member] | Board of Directors [Member]
Number of stock options granted																33,333			26,906
Number of stock option granted as adjusted to reflect merger																96,482			77,846
Weighted-average exercise price per share, granted																$ 20.25			$ 12.00
Stock option merger retroactively adjusted exercise price per share																$ 7.05			$ 4.20
CardioSert Ltd [Member]
Number of common shares acquired								6,738	6,738
CardioSert Ltd [Member] | Research and Development Expense [Member]
Acquisition price of assets								$ 74
Common Stock [Member]
Rights to acquire shares of common stock															655,962
Number of option exercised	[1]																						2,487
Common Stock [Member] | Board of Directors [Member]
Number of stock options granted				11,630
Common Stock [Member] | Directors [Member]
Number of stock options granted											12,698
Common Stock [Member] | Employees [Member]
Number of stock options granted		17,503								66,036
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] | Board of Directors [Member]
Number of stock options granted											190,475
Weighted-average exercise price per share, granted											$ 1.05
Before Reverse Split [Member] | Harel Gadot [Member]
Number of stock options granted												1,812,712
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
Weighted-average exercise price per share, granted										$ 1.02
Number of option exercised																	37,300
Before Reverse Split [Member] | Employees and Consultant [Member]
Number of option exercised																		471,794
Before Reverse Split [Member] | Non-Executive Officer [Member]
Number of stock options granted							150,000
Weighted-average exercise price per share, granted							$ 0.6
Before Reverse Split [Member] | Microbot Israel [Member] | Board of Directors [Member]
Number of stock options granted																500,000			403,592
Weighted-average exercise price per share, granted																$ 1.35			$ 0.80
Before Reverse Split [Member] | CardioSert Ltd [Member]
Number of common shares acquired								100,000	100,000
Pre-Funded Warrant [Member] | Investor [Member] | Securities Purchase Agreement [Member]
Warrant to purchase for common stock						125,323
Warrant price per share						$ 6.49
Proceeds from issuance and sale of stock						$ 3,000
Common Stock [Member] | Before Reverse Split [Member]
Rights to acquire shares of common stock															9,735,925
Series A Convertible Preferred Stock [Member]
Designated preferred stock															9,736
[1] Share data as of December 31, 2017, June 30, 2018, and for the periods then ended represent the number of shares adjusted to retroactively reflect the 1:15 reverse stock split effected on September 4, 2018. Refer to Note 1 for further information.

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