Basic and Diluted Net Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				9 Months Ended				12 Months Ended
	Jun. 30, 2018	[1]	Jun. 30, 2017	[1]	Sep. 30, 2018		Sep. 30, 2017	[1]	Dec. 31, 2017		Dec. 31, 2016
Earnings Per Share [Abstract]
Net loss attributable to shareholders of the company					$ (5,111)		$ (6,002)		$ 7,589	[2]	$ 9,663	[2]
Net loss attributable to shareholders of preferred shares					(226)		(1,442)		(1,582)	[2]	(3,954)	[2]
Net loss used in the calculation of basic net loss per share					$ (4,885)		$ (4,560)		$ 6,007	[2]	$ 5,709	[2]
Net loss per share	$ (0.58)		$ (0.45)		$ (1.69)	[1]	$ (2.25)		$ (2.67)	[3]	$ (5.94)	[3]
Weighted average number of common shares	2,947,633		2,383,327		2,876,020	[1]	2,061,331		2,201,992	[2]	963,047	[2]

[1] September 30, 2017 share data represents the number of shares adjusted to retroactively reflect the 1:15 reverse stock split effected on September 4, 2018.

[2] December 31 2017 and 2016 shares data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.

[3] 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.