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Equity-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Option Activity

Stock option activity for employees:

    Number of Options     Weighted Average Exercise
Price
    Weighted Average Remaining Contractual Term
(Years)
    Aggregate Intrinsic
Value
 
Outstanding January 1, 2017     836,256     $ 16.82       4.47     $  
Granted     369,929       0.55              
Forfeited     (6,715 )     24.45              
Outstanding June 30, 2017     1,199,470     $ 11.76       5.85     $  
Vested and expected to vest June 30, 2017     1,199,470     $ 11.76       5.85     $  
Exercisable June 30, 2017     857,288     $ 15.24       3.53     $  

 

Stock option activity for non-employees:

    Number of Options     Weighted Average Exercise
Price
    Weighted Average Remaining Contractual Term
(Years)
    Aggregate Intrinsic
Value
 
Outstanding January 1, 2017     271,500     $ 10.41       4.66     $  
Granted     149,740       0.57              
Exercised                        
Forfeited     (5,590 )     15.08              
Outstanding June 30, 2017     415,650     $ 6.80       6.26     $  
Vested and expected to vest June 30, 2017     415,650     $ 6.80       6.26     $  
Exercisable June 30, 2017     269,161     $ 10.17       4.17     $  

Schedule of Unvested Stock Option Activity

Unvested stock option activity for employees:

    Number of Options     Weighted Average Exercise
Price
    Average Remaining Contractual Term
(Years)
    Aggregate Intrinsic
Value
 
Outstanding January 1, 2017     90,625     $ 1.72       9.33     $  
Granted     369,929       0.55              
Vested     (118,373 )     1.45              
Forfeited                        
Outstanding June 30, 2017     342,181     $ 0.55       9.89     $  

 

Unvested stock option activity for non-employees:

    Number of Options     Weighted Average Exercise
Price
    Weighted Average Remaining Contractual Term
(Years)
    Aggregate Intrinsic
Value
 
Outstanding January 1, 2017     26,389     $ 1.65       8.61     $  
Granted     149,740       0.57              
Vested     (26,862)       1.46              
Forfeited     (2,778 )     1.56              
Outstanding June 30, 2017     146,489     $ 0.58       9.81     $