Redeemable Convertible Preferred Stock and Stockholders' Deficit (Details 2) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Opening balance		$ (3,618)
Proceeds from issuance of Series B Shares		2,225		$ 1,458
Accretion of Series B Preferred Stock to redemption value	[1]	1,968
Preferred dividend on Series B Preferred Stock	[2]	79
Closing balance		(7,279)		(3,618)
Series B Preferred Stock [Member]
Opening balance		87
Proceeds from issuance of Series B Shares		2,225
Accretion of Series B Preferred Stock to redemption value		1,968
Partial exercise of Series B Preferred Stock written call option		677
Preferred dividend on Series B Preferred Stock		79
Closing balance		$ 5,036		$ 87

[1] Based on the rights and privileges of Series B Preferred Stock, since the Company did not obtain shareholder approval at March 31, 2018, the then outstanding Series B Preferred Stock became redeemable at the option of OFI.

[2] The net loss used for the computation of basic and diluted net loss per share for three months ended March 31, 2018, includes the preferred dividend requirement of 8% per share per annum for the Series B Preferred Stock, compounded annually which shall be distributed to stockholders in case of distributable assets determined in the Company's certificate of designation under the liquidation preference right (see also Note 5).