v3.26.3
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Marketable Securities, Available For Sale    
Cash and cash equivalents $ 68,680 $ 61,148
Fair Value, Recurring    
Marketable Securities, Available For Sale    
Amortized Cost Basis, Marketable securities, available for sale 1,749,284 529,249
Unrealized Gains, Marketable securities, available for sale   682
Unrealized Losses, Marketable securities, available for sale (5,602) (5)
Fair Market Value, Marketable securities, available for sale 1,743,682 529,926
Fair Value, Recurring | Level 1 | Money market funds    
Marketable Securities, Available For Sale    
Cash and cash equivalents 68,469 60,965
Cash equivalents, Fair Market Value 68,469 60,965
Fair Value, Recurring | Level 2 | Asset-backed securities    
Marketable Securities, Available For Sale    
Amortized Cost Basis, Marketable securities, available for sale 195,655 55,426
Unrealized Gains, Marketable securities, available for sale   78
Unrealized Losses, Marketable securities, available for sale (523)  
Fair Market Value, Marketable securities, available for sale 195,132 55,504
Fair Value, Recurring | Level 2 | Corporate debt securities    
Marketable Securities, Available For Sale    
Amortized Cost Basis, Marketable securities, available for sale 556,283 193,479
Unrealized Gains, Marketable securities, available for sale   270
Unrealized Losses, Marketable securities, available for sale (1,782) (5)
Fair Market Value, Marketable securities, available for sale 554,501 193,744
Fair Value, Recurring | Level 2 | Commercial paper    
Marketable Securities, Available For Sale    
Amortized Cost Basis, Marketable securities, available for sale 161,358 10,424
Unrealized Gains, Marketable securities, available for sale   7
Unrealized Losses, Marketable securities, available for sale (443)  
Fair Market Value, Marketable securities, available for sale 160,915 10,431
Fair Value, Recurring | Level 2 | U.S. government treasury and agency securities    
Marketable Securities, Available For Sale    
Amortized Cost Basis, Marketable securities, available for sale 767,519 208,955
Unrealized Gains, Marketable securities, available for sale   327
Unrealized Losses, Marketable securities, available for sale (2,854)  
Fair Market Value, Marketable securities, available for sale $ 764,665 $ 209,282