Net Loss per Share (Details Textual) - $ / shares	9 Months Ended
	Sep. 30, 2017	Aug. 31, 2017
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 1.50
Warrant [Member] | Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 4.50
Warrant [Member] | Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	7.43
Employee Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	3.55
Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 4.50