Quarterly report pursuant to Section 13 or 15(d)

Subsequent Event - Additional Information (Detail)

v3.21.1
Subsequent Event - Additional Information (Detail) - USD ($)
$ in Millions
May 15, 2021
May 21, 2020
Apr. 01, 2021
Mar. 31, 2021
K2 Loan and Security Agreement        
Subsequent Event [Line Items]        
Loan and security agreement   $ 45.0    
Tranche Two | K2 Loan and Security Agreement        
Subsequent Event [Line Items]        
Loan and security agreement   $ 20.0    
Subsequent Event | Tranche Two | K2 Loan and Security Agreement        
Subsequent Event [Line Items]        
Loan and security agreement $ 20.0      
Takeda Development Agreement        
Subsequent Event [Line Items]        
Expected co-share payments payable       $ 10.2
Takeda Development Agreement | Subsequent Event        
Subsequent Event [Line Items]        
Expected co-share payments payable     $ 10.2