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Summary of Significant Accounting Policies - Basic and Diluted Loss Per Common Share (Details) - shares
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Stock options    
Anti-dilutive securities    
Outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive (in shares) 976,711  
Restricted stock    
Anti-dilutive securities    
Outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive (in shares) 157,262  
Preferred stock    
Anti-dilutive securities    
Outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive (in shares) 1,969,797  
Conversion option on promissory notes - related parties    
Anti-dilutive securities    
Outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive (in shares)   512,160