Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
At-the-Market Offering [Member]
Issuance expenses paid	$ 109	$ 109
Investment Agreement [Member]
Issuance expenses paid	300	300
Best Efforts [Member]
Issuance expenses paid	686	686
Registered Direct [Member]
Issuance expenses paid	1,035	1,035
Warrant Exercise [Member]
Issuance expenses paid	$ 1,019	$ 1,019