Annual report pursuant to Section 13 and 15(d)

Material Agreements - Additional Information (Detail)

v3.20.2
Material Agreements - Additional Information (Detail) - USD ($)
$ / shares in Millions, $ in Millions
12 Months Ended
May 31, 2019
Dec. 07, 2018
Mar. 31, 2020
Mar. 31, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Upfront, non-refundable payment     $ 30.0  
Research and development and out-of-pocket     50.00%  
Purchase price   $ 37.8    
Swiss value-added tax receivable     $ 3.0 $ 2.9
Maximum [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
consideration paid     $ 20.0  
Maximum [Member] | Upon Achievement Of Development Regulatory And Sales Milestones [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Contingent milestone payments     $ 452.5  
Achievement of Development and Regulatory [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Milestone Payments $ 10.0