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Stock Based Compensation (Details 1) - Stock options - USD ($)
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Number of Options Outstanding      
Options outstanding at December 31, 2016 389,379    
Granted 12,000    
Cancelled/forfeited (19,593)    
Options outstanding at September 30, 2017 381,786    
Unvested at September 30, 2017 (236,962)    
Vested and exercisable at September 30, 2017 144,824    
Weighted Average Exercise Price Per Share      
Options outstanding at December 31, 2016 $ 25.80    
Granted 4.38    
Cancelled/forfeited 108.73    
Options outstanding at September 30, 2017 20.87    
Unvested at September 30, 2017 5.06    
Vested and exercisable at September 30, 2017 $ 46.73    
Weighted Average Remaining Contractual Term (Years)      
Options outstanding 5 years 2 months 27 days 5 years 9 months 29 days  
Unvested at September 30, 2017 4 years 4 months 28 days    
Vested and exercisable at September 30, 2017 6 years 7 months 6 days    
Aggregate Intrinsic Value      
Options outstanding $ 0   $ 121,000
Unvested at September 30, 2017 0    
Vested and exercisable at September 30, 2017 $ 0