Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		6 Months Ended
	Feb. 06, 2019	Jul. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity (Textual)
Net of issuance expenses			$ 812
Aggregate net proceeds			$ 5,967
Number of shares sold			1,644,118
Unrecognized compensation expense			$ 2,425
Unrecognized compensation expense, recognition period			3 years 2 months 30 days
Open Market Sales Agreement - Jefferies, LLC [Member]
Stockholders' Equity (Textual)
Aggregate offering price	$ 50,000	$ 80,000
Common stock average price			$ 4.12
Agreement [Member]
Stockholders' Equity (Textual)
Net of issuance expenses				$ 148
Aggregate net proceeds				$ 1,952
Number of shares sold				170,600
Common stock average price				$ 12.30