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Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	6 Months Ended	12 Months Ended
	Aug. 31, 2017	Jun. 30, 2018	Dec. 31, 2017
Stockholders' Equity (Textual)
Warrants to purchase common stock outstanding		11,163,677	11,163,677
August 2017 Private Placement [Member]
Stockholders' Equity (Textual)
Issuance of common stock			3,250,000
Common stock per share			$ 2.00
Cash proceeds from warrants			$ 6,500
Warrant, description			The 2017 Warrants will become exercisable 12 months from the date of issuance and will expire three years from the date of issuance.
Securities Purchase Agreement [Member] | August 2017 Private Placement [Member]
Stockholders' Equity (Textual)
Issuance of common stock	9,750,000
Gross proceeds warrants for an aggregate purchase price	$ 9,750
Common stock per share	$ 1.00

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