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Convertible Promissory Notes and Other Notes Payable (Details 4) - $ / shares
1 Months Ended 2 Months Ended 12 Months Ended
Mar. 25, 2016
Dec. 11, 2015
Nov. 23, 2015
Sep. 02, 2015
Jan. 31, 2015
Apr. 30, 2014
Mar. 31, 2016
Mar. 31, 2016
Nov. 11, 2015
Assumption:                  
Market Price (in dollars per share)             $ 8.75 $ 8.75  
Warrant [Member]                  
Assumption:                  
Market Price (in dollars per share) $ 8.00 $ 5.00 $ 6.75 $ 9.11 $ 8.00       $ 6.50
Exercise price per share $ 8.00 $ 7.00 $ 7.00 $ 9.25 $ 10.00        
Risk-free interest rate 1.39% 1.16% 1.70% 1.52%          
Contractual term in years 5 years 3 years 5 years 5 years          
Volatility 78.96% 77.88% 77.95% 77.20%          
Dividend rate 0.00% 0.00% 0.00% 0.00% 0.00%        
Weighted Average Fair Value per share $ 5.08 $ 2.12 $ 4.22 $ 5.68          
Icahn School of Medicine at Mount Sinai [Member]                  
Assumption:                  
Market Price (in dollars per share)           $ 9.40      
Icahn School of Medicine at Mount Sinai [Member] | Warrant [Member]                  
Assumption:                  
Market Price (in dollars per share)           9.40      
Exercise price per share           $ 10.00      
Risk-free interest rate           1.59%      
Contractual term in years           5 years      
Volatility           80.30%      
Dividend rate           0.00%      
Weighted Average Fair Value per share           $ 5.95      
10% Promissory Note [Member] | Icahn School of Medicine at Mount Sinai [Member] | Warrant [Member]                  
Assumption:                  
Exercise price per share           $ 10.00      
Pre-Modification [Member] | Warrant [Member]                  
Assumption:                  
Market Price (in dollars per share)             8.25 8.25  
Exercise price per share             $ 12.99 12.99  
Risk-free interest rate             0.28%    
Contractual term in years             1 month 24 days    
Volatility             91.20%    
Dividend rate             0.00%    
Weighted Average Fair Value per share             $ 0.30 0.30  
Pre-Modification [Member] | 10% Promissory Note [Member] | Icahn School of Medicine at Mount Sinai [Member] | Warrant [Member]                  
Assumption:                  
Market Price (in dollars per share)             16.00 16.00  
Exercise price per share             10.00 $ 10.00  
Risk-free interest rate               1.34%  
Contractual term in years               3 years 9 months 4 days  
Volatility               76.30%  
Dividend rate               0.00%  
Weighted Average Fair Value per share             10.48 $ 10.48  
Post-Modification [Member] | Warrant [Member]                  
Assumption:                  
Market Price (in dollars per share)             8.25 8.25  
Exercise price per share             $ 12.99 12.99  
Risk-free interest rate             0.36%    
Contractual term in years             4 months 24 days    
Volatility             91.20%    
Dividend rate             0.00%    
Weighted Average Fair Value per share             $ 0.80 0.80  
Post-Modification [Member] | 10% Promissory Note [Member] | Icahn School of Medicine at Mount Sinai [Member] | Warrant [Member]                  
Assumption:                  
Market Price (in dollars per share)             16.00 16.00  
Exercise price per share             7.00 $ 7.00  
Risk-free interest rate               1.34%  
Contractual term in years               3 years 9 months 4 days  
Volatility               76.30%  
Dividend rate               0.00%  
Weighted Average Fair Value per share             $ 11.6 $ 11.6