Consolidated Statements of Changes in Equity (Capital Deficiency) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Issuance costs	$ 776	$ 1,966
Restricted stock award, shares	202	36
Represents equity value, description	Represents an amount less than $1 thousand
Preferred C Stock [Member]
Issuance costs	$ 776
Preferred D Stock [Member]
Issuance costs	$ 90