v3.26.1
Acquisition (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
May 21, 2025
USD ($)
installment
lease
$ / shares
shares
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
shares
Acquisitions            
Common stock reserved for future issuance | shares   33,849,883   33,849,883   31,068,650
Gain on bargain purchase     $ 187,907   $ 187,907  
Stock-based compensation expense recognized   $ 14,273 18,635 $ 26,612 25,630  
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense            
Acquisitions            
Stock-based compensation expense recognized   5,630 11,410 10,617 14,686  
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense            
Acquisitions            
Stock-based compensation expense recognized   8,643 7,225 15,995 10,944  
RSUs            
Acquisitions            
Stock-based compensation expense recognized   2,230 4,397 3,790 4,397  
ACELYRIN            
Acquisitions            
Number of shares issued in exchange | shares 48,653,549          
Stock option, exercise price ($ per share) | $ / shares $ 18          
Exchange ratio 0.4814          
Merger transaction costs   $ 0   0    
Fair value of IPR&D asset $ 50,959          
Discount rate 24.00%          
Credit voucher acquired, balance $ 11,400          
Number of operating leases acquired | lease 2          
Lease liability fair value adjustment, short term portion $ 200          
Lease liability fair value adjustment, long term portion 500          
Right of use asset fair value adjustment 100          
Gain on bargain purchase 187,907          
Deferred income tax liability $ 10,701          
ACELYRIN | Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense            
Acquisitions            
Merger transaction costs     7,100   14,800  
ACELYRIN | Severance Plan            
Acquisitions            
Entitled period (in months) 12 months          
Maximum options exercise periods extension period, post-termination (in months) 12 months          
Severance cash obligations $ 11,900          
Severance cost       0    
Additional stock-based compensation           $ 13,100
Stock-based compensation expense recognized     10,800 $ 0 10,800 13,100
ACELYRIN | Severance Plan | Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense            
Acquisitions            
Severance cost         5,200 6,500
Stock-based compensation expense recognized     7,800   7,800 9,000
ACELYRIN | Severance Plan | Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense            
Acquisitions            
Severance cost         3,700 5,400
Stock-based compensation expense recognized     $ 3,000   $ 3,000 $ 4,100
ACELYRIN | RSUs            
Acquisitions            
Shares issued for conversion | shares 1,323,905          
ACELYRIN | Performance based RSU            
Acquisitions            
Shares issued for conversion | shares 146,963          
Percentage of performance conditions achieved 100.00%          
ACELYRIN | Performance based RSU | Merger closes before May 15, 2025            
Acquisitions            
Number of installments | installment 2          
ACELYRIN | ACELYRIN Plans            
Acquisitions            
Common stock reserved for future issuance | shares 4,712,186