Condensed Statements of Changes in Shareholders' Equity (Deficiency) (Unaudited) - USD ($) $ in Thousands		Ordinary Share		Receivables on account of shares	Additional paid-in capital	Accumulated deficit	Total
Balance at Dec. 31, 2017		$ 84			$ 134,843	$ (131,220)	$ 3,707
Balance, shares at Dec. 31, 2017		1,200,146
Cumulative effect to accumulated deficit from adoption of a new accounting standard						(23)	(23)
Share-based compensation to employees and non-employees					796		796
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees			[1]
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees, shares		4,695
Issuance of ordinary shares in at-the-market offering, net of issuance expenses in the amount of $50		$ 2		(42)	388		348
Issuance of ordinary shares in at-the-market offering, net of issuance expenses in the amount of $50, shares		15,576
Net loss						(6,327)	(6,327)
Balance at Mar. 31, 2018		$ 86		(42)	136,027	(137,570)	(1,499)
Balance, shares at Mar. 31, 2018		1,220,417
Balance at Dec. 31, 2018		$ 193			154,670	(152,918)	1,945
Balance, shares at Dec. 31, 2018		2,813,087
Share-based compensation to employees and non-employees					319		319
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees			[1]
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees, shares		2,206
Issuance of ordinary shares in "best efforts" offering, net of issuance expenses in the amount of $686	[2]	$ 52			3,632		3,684
Issuance of ordinary shares in "best efforts" offering, net of issuance expenses in the amount of $686. shares	[2]	760,000
Exercise of pre-funded warrants and warrants	[2]	$ 8			99		107
Exercise of pre-funded warrants and warrants, shares	[2]	119,881
Net loss						$ (4,000)	(4,000)
Balance at Mar. 31, 2019		$ 253			$ 158,720	$ (156,918)	$ 2,055
Balance, shares at Mar. 31, 2019		3,695,174

[1] Represents an amount lower than $1.

[2] See Note 7f to the condensed consolidated financial statements