Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation (Details)

v3.4.0.3
Stock Based Compensation (Details)
 3 Months Ended
Jan. 04, 2016
shares
Oct. 13, 2015
item
Jun. 26, 2015
May. 06, 2013
shares
Jan. 10, 2012
shares
Mar. 31, 2016
USD ($)
$ / shares
shares
Mar. 31, 2015
USD ($)
Aug. 31, 2015
shares
Aug. 28, 2011
shares
Total stock-based compensation | $           $ 937,308 $ 50,188    
Option Activity, Number of shares                  
Balance, beginning of period           959,188      
Granted           491,764      
Balance, end of period           1,450,952      
Vested or expected to vest           1,450,952      
Exercisable           606,647      
Option Activity, Weighted-average exercise price                  
Beginning of period | $ / shares           $ 7.68      
Granted | $ / shares           3.29      
End of period | $ / shares           6.19      
Vested or expected to vest | $ / shares           6.19      
Exercisable | $ / shares           $ 8.51      
Option Activity, Fair value of options granted                  
Granted | $           $ 1,119,157      
Option Activity, Weighted-average remaining contractual term (in years)                  
Balance           8 years 8 months 19 days      
Vested or expected to vest           8 years 8 months 19 days      
Exercisable           7 years 5 months 5 days      
Research and development expense                  
Total stock-based compensation | $           $ 23,442 (4,063)    
General and administrative                  
Total stock-based compensation | $           913,866 $ 54,251    
General and administrative | Chief Executive Officer                  
Total stock-based compensation | $           $ 781,266      
2011 stock incentive plan                  
Number of shares authorized for issuance       704,428         178,571
Number of grants to be made under Plan | item   0              
Increase in number of shares reserved for issuance       418,714 107,143        
2011 stock incentive plan | Stock Options                  
Options term (in years)           10 years      
2011 stock incentive plan | Minimum | Stock Options                  
Vesting period           3 years      
2011 stock incentive plan | Maximum | Stock Options                  
Vesting period           4 years      
2015 Omnibus Plan [Member]                  
Increase in number of shares reserved for issuance 259,504                
Common stock remaining for future issuance (in shares)           464,476      
Annual share reserve increase (as a percent)     3.00%            
2015 Omnibus Plan [Member] | Maximum                  
Number of shares authorized for issuance               890,815