Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)

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Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Assets    
Cash equivalents (money market funds) $ 960,188  
Short-term investments    
Publicly traded stock 20,295  
U.S. Treasury securities 64,960  
Fixed income (corporate fixed income and bonds, agency securities) 111,660  
Certificates of deposit 249,937  
Warrants in publicly traded companies 990  
Short-term investments 447,842 $ 21,750
Convertible promissory note 10,000  
Equity investment in affiliate 29,289  
Note receivable from affiliate 8,835  
Total assets 1,456,154  
Liabilities    
Government grants 3,456 3,657
Warrant liabilities 1,058,990  
Earn-out liabilities 128,102  
Total liabilities 1,190,548 3,657
Level 1 [Member]    
Assets    
Cash equivalents (money market funds) 960,188  
Short-term investments    
Publicly traded stock 20,295  
U.S. Treasury securities 64,960  
Fixed income (corporate fixed income and bonds, agency securities)  
Certificates of deposit  
Warrants in publicly traded companies  
Short-term investments 85,255  
Convertible promissory note  
Equity investment in affiliate  
Note receivable from affiliate  
Total assets 1,045,443  
Liabilities    
Government grants
Warrant liabilities  
Earn-out liabilities  
Total liabilities
Level 2 [Member]    
Assets    
Cash equivalents (money market funds)  
Short-term investments    
Publicly traded stock  
U.S. Treasury securities  
Fixed income (corporate fixed income and bonds, agency securities) 111,660  
Certificates of deposit 249,937  
Warrants in publicly traded companies  
Short-term investments 361,597  
Convertible promissory note  
Equity investment in affiliate  
Note receivable from affiliate  
Total assets 361,597  
Liabilities    
Government grants
Warrant liabilities  
Earn-out liabilities  
Total liabilities
Level 3 [Member]    
Assets    
Cash equivalents (money market funds)  
Short-term investments    
Publicly traded stock  
U.S. Treasury securities  
Fixed income (corporate fixed income and bonds, agency securities)  
Certificates of deposit  
Warrants in publicly traded companies 990  
Short-term investments 990  
Convertible promissory note 10,000  
Equity investment in affiliate 29,289  
Note receivable from affiliate 8,835  
Total assets 49,114  
Liabilities    
Government grants 3,456 3,657
Warrant liabilities 1,058,990  
Earn-out liabilities 128,102  
Total liabilities $ 1,190,548 $ 3,657