Quarterly report pursuant to Section 13 or 15(d)

License Agreements - Additional Information (Detail)

v3.8.0.1
License Agreements - Additional Information (Detail)
 1 Months Ended 15 Months Ended 105 Months Ended
May 14, 2015
Jul. 31, 2016
USD ($)
Sep. 30, 2017
USD ($)
g
Sep. 30, 2017
USD ($)
Sopharma [Member]        
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]        
Payments under license agreement       $ 10
License agreement expiry date May 26, 2029      
University of Bristol [Member]        
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]        
Payments under license agreement     $ 50,000  
Maximum amount payable under license agreement, tied to milestones   $ 3,200,000    
License agreement expiry   2036-07    
Volume of cytisine provided as an initial contribution | g     100  
University of Bristol [Member] | Minimum [Member] | License Agreement [Member]        
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]        
Patent expiry date   Feb. 05, 2036