Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Share (Details Textual)

v3.8.0.1
Net Loss per Share (Details Textual) - $ / shares
3 Months Ended
Mar. 31, 2018
Jan. 31, 2018
Jan. 09, 2018
Aug. 31, 2017
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 1.10 $ 1.10 $ 1.50
Warrant [Member] | Minimum [Member]        
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 1.10      
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 1.30      
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