v3.26.3
Equity Method Investments - Investment in Arbutus (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Nov. 09, 2026
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Equity Method Investments [Line Items]                  
Number of shares acquired (in shares)   723,687,406   723,687,406     720,352,386    
Aggregate fair value investment   $ 504,914   $ 504,914     $ 407,985    
Common Stock                  
Equity Method Investments [Line Items]                  
Number of shares acquired (in shares)   723,687,406 689,697,370 723,687,406 689,697,370 722,668,062 720,352,386 682,229,832 695,938,323
Investment in Arbutus common shares                  
Equity Method Investments [Line Items]                  
Equity method investment ownership percentage   19.00%   19.00%          
Aggregate fair value investment   $ 185,700   $ 185,700     $ 174,800    
Unrealized gains (losses) on investments   $ (800) $ 56,300 $ 10,900 $ 40,800        
Closing price of common stock (in dollars per share)   $ 4.78   $ 4.78     $ 4.50    
Investment in Arbutus common shares | Common Stock                  
Equity Method Investments [Line Items]                  
Number of shares acquired (in shares)   38,847,462   38,847,462          
Investment in Arbutus common shares | Common Stock | Subsequent Event                  
Equity Method Investments [Line Items]                  
Number of shares repurchased (in shares) 8,967,383                
Stock repurchased, value $ 44,800