Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Share (Details Textual)

v3.7.0.1
Net Loss per Share (Details Textual) - $ / shares
3 Months Ended
Jan. 04, 2017
Mar. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 3.74    
Minimum [Member]      
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 4.50  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price   3.55  
Maximum [Member]      
Class of Warrant or Right, Exercise Price of Warrants or Rights   7.43  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price   4.50  
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