v3.26.1
Segment Information - Schedule of Segment Reporting Financial Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2026
Mar. 31, 2025
Sep. 30, 2025
Revenue              
Total revenue $ 17,159   $ 14,926   $ 35,774 $ 31,885  
Operating expenses:              
Research and development 19,443   28,065   40,302 55,721  
General and administrative 9,568   11,388   18,577 24,234  
Total operating expenses 29,011   39,453   58,879 79,955  
Loss from operations (11,852)   (24,527)   (23,105) (48,070)  
Other income (expense):              
Interest expense (3,316)   (1,714)   (6,399) (3,676)  
Interest and investment income, net 2,084   2,292   4,506 5,091  
Total other (expense) income, net (1,232)   578   (1,893) 1,415  
Loss before income taxes (13,084)   (23,949)   (24,998) (46,655)  
Income tax (expense) benefit (7)   1,305   (31) 1,721  
Net loss (13,091) $ (11,938) (22,644) $ (22,290) (25,029) (44,934) $ (81,889)
Royalty [Member]              
Revenue              
Total revenue 17,159   14,926   35,774 31,885  
Virology [Member]              
Operating expenses:              
Research and development 4,933   17,794   9,854 36,207  
Virology [Member] | RSV [Member]              
Operating expenses:              
Research and development 4,933   17,794   9,854 36,207  
Immunology [Member]              
Operating expenses:              
Research and development 12,732   9,764   26,935 18,386  
Immunology [Member] | KIT [Member]              
Operating expenses:              
Research and development 3,726   3,588   8,571 7,845  
Immunology [Member] | STAT6 [Member]              
Operating expenses:              
Research and development 6,394   3,705   13,495 5,993  
Immunology [Member] | MRGPRX2 [Member]              
Operating expenses:              
Research and development 2,612   2,471   4,869 4,548  
Other programs [Member]              
Operating expenses:              
Research and development 1,778   507   3,513 1,128  
Other programs [Member] | Early discovery [Member]              
Operating expenses:              
Research and development 1,572   153   3,151 512  
Other programs [Member] | Other pipeline programs [Member]              
Operating expenses:              
Research and development $ 206   $ 354   $ 362 $ 616