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Related-Party Transactions - Loan Payable (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2017
shares
Mar. 31, 2017
shares
Dec. 31, 2014
USD ($)
Jan. 31, 2012
shares
Jun. 30, 2017
shares
Dec. 31, 2017
item
Dec. 31, 2015
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
item
Related Party Transaction [Line Items]                  
Payment of loan from related party             $ 41,469    
Shares issued | shares 1,783,587 4,304,813     4,304,813        
Dr. Tabuteau                  
Related Party Transaction [Line Items]                  
Ownership of outstanding common shares, percent 5.00%         5.00%      
Dr. Tabuteau | Loan payable                  
Related Party Transaction [Line Items]                  
Outstanding payable             $ 41,469 $ 62,469  
Interest payable               $ 0  
Payment of loan from related party     $ 21,000            
Antecip                  
Related Party Transaction [Line Items]                  
Shares issued | shares       7,344,500          
License Agreements | Antecip                  
Related Party Transaction [Line Items]                  
Number of exclusive license agreements | item           3     3