STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIENCY) - USD ($) $ in Thousands	Total		Common Stock [Member]		Preferred Stock [Member]		Additional paid-in capital		Accumulated deficit [Member]
Balance at Dec. 31, 2016	$ (6,541)		$ 6		$ 0		$ 48,413		$ (54,960)
Balance (in shares) at Dec. 31, 2016			5,713,383		0
Issuance of Common Stock, net of issuance cost	9,470		$ 1		$ 0		9,469		0
Issuance of Common Stock, net of issuance cost (in shares)			3,754,770		0
Payment for executives and directors under Stock for Salary Program	707		$ 0	[1]	$ 0		707		0
Payment for executives and directors under Stock for Salary Program (in shares)			271,880		0
Issuance of Common Stock to Employees	1,514		$ 0	[1]	$ 0		1,514		0
Issuance of Common Stock to Employees (in shares)			474,880		0
Issuance of Common Stock to consultants and service provider	874		$ 0	[1]	$ 0		874		0
Issuance of Common Stock to consultants and service provider (in shares)			281,681		0
Reclassification of warrants from liability to equity on March 8, 2017	8,655		$ 0		$ 0		8,655		0
Exercise of options	0	[1]	$ 0	[1]	$ 0		0	[1]	0
Exercise of options (in shares)			91,855		0
Issuance of Preferred Stock, net of issuance cost	3,711		$ 0		$ 0	[1]	3,711		0
Issuance of Preferred Stock, net of issuance cost (in shares)			0		2,307,654
Issuance of Common stock in November 2017 warrant exchange agreement	0	[1]	$ 0	[1]	$ 0		0		0
Issuance of Common stock in November 2017 warrant exchange agreement (in shares)			1,039,676		0
Conversion of Preferred Stock to Common Stock	0		$ 0	[1]	$ 0	[1]	0		0
Conversion of Preferred Stock to Common Stock (in shares)			2,307,654		(2,307,654)
Deemed dividend related to Stock dividend	0		$ 0	[1]	$ 0		255		(255)
Deemed dividend related to Stock dividend (in shares)			138,459		0
Stock-based compensation	1,294		$ 0		$ 0		1,294		0
Net loss	(15,743)		0		0		0		(15,743)
Balance at Dec. 31, 2017	3,941		$ 7		$ 0		74,892		(70,958)
Balance (in shares) at Dec. 31, 2017			14,074,238		0
Issuance of Common Stock, net of issuance cost	2,865		$ 0	[1]	$ 0		2,865		0
Issuance of Common Stock, net of issuance cost (in shares)			2,262,269		0
Payment for executives and directors under Stock for Salary Program	161		$ 0	[1]	$ 0		161		0
Payment for executives and directors under Stock for Salary Program (in shares)			102,548		0
Issuance of Common Stock to consultants and service provider	60		$ 0	[1]	$ 0		60		0
Issuance of Common Stock to consultants and service provider (in shares)			41,109		0
Issuance of Preferred Stock, net of issuance cost	3,124		$ 0		$ 0	[1]	3,124		0
Issuance of Preferred Stock, net of issuance cost (in shares)			0		1,234,080
Stock-based compensation	139		$ 0		$ 0		139		0
Net loss	(2,919)		0		0		0		(2,919)
Balance at Mar. 31, 2018	$ 7,371		$ 7		$ 0	[1]	$ 81,241		$ (73,877)
Balance (in shares) at Mar. 31, 2018			16,480,164		1,234,080

[1] Represents an amount lower than $1.