v3.26.3
Capital Stock - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended 11 Months Ended 20 Months Ended
Jun. 03, 2026
Jun. 02, 2026
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Nov. 09, 2025
Nov. 10, 2025
Tanabe | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement                  
Class of Stock [Line Items]                  
One-time cash payments   $ 200.0              
Public Stock Offering                  
Class of Stock [Line Items]                  
Shares issued (in shares) 5,660,378                
Price per share (in USD per share) $ 26.50                
Gross proceeds of sale of stock $ 143.6                
At the Market                  
Class of Stock [Line Items]                  
Shares issued (in shares)     0 0 568,320 0 2,720,508    
Price per share (in USD per share)     $ 41.45   $ 41.45   $ 41.45    
Gross proceeds of sale of stock         $ 20.2   $ 112.4    
Price per share (in USD per share)         $ 35.66        
Common shares available for sale     $ 187.2   $ 187.2   $ 187.2    
At the Market | Maximum                  
Class of Stock [Line Items]                  
Maximum aggregate offering price                 $ 300.0
Prior ATM Agreement                  
Class of Stock [Line Items]                  
Shares issued (in shares)               1,914,040  
Price per share (in USD per share)               $ 14.32  
Gross proceeds of sale of stock               $ 27.3  
Issuance of common stock, net of offering costs (in shares)     0   0