v3.26.1
Shareholders' Equity - Schedule of Changes in Issued and Outstanding Common Shares and Share Capital (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Common Stock [Member]    
Shareholders' Equity - Schedule of Changes in Issued and Outstanding Common Shares and Share Capital (Details) [Line Items]    
Balance as of December 31, 2025 as adjusted, Number (in Shares) 1  
Balance as of December 31, 2025 as adjusted, Amount [1] $ 220,587  
Issuance upon exercise of stock options, Amount 1,181  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Amount  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Amount 265,006  
Earn-out share liability at Closing of Reverse Recapitalization, Amount (9,997)  
Warrant Exercise, Amount 1,397  
Balance as of March 31, 2026, Number (in Shares)    
Balance as of March 31, 2026, Amount $ 478,174  
Common Stock [Member]    
Shareholders' Equity - Schedule of Changes in Issued and Outstanding Common Shares and Share Capital (Details) [Line Items]    
Balance as of December 31, 2025 as adjusted, Number (in Shares) [1] 255,894,945  
Issuance upon exercise of stock options, Number (in Shares) 1,789,955  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Number (in Shares)  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Number (in Shares) 40,308,937  
Warrant Exercise, Number (in Shares) 517,527  
Balance as of March 31, 2026, Number (in Shares) 298,511,364  
Old Xanadu Convertible Preferred Shares [Member] | Preferred Stock [Member]    
Shareholders' Equity - Schedule of Changes in Issued and Outstanding Common Shares and Share Capital (Details) [Line Items]    
Balance as of December 31, 2025 as adjusted, Number (in Shares) [1] 199,930,069  
Balance as of December 31, 2025 as adjusted, Amount [1] $ 213,002  
Issuance upon exercise of stock options, Number (in Shares)
Issuance upon exercise of stock options, Amount  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Number (in Shares) (199,930,069)  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Amount $ (213,002)  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Number (in Shares)  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Amount  
Earn-out share liability at Closing of Reverse Recapitalization, Amount  
Warrant Exercise, Number (in Shares)  
Warrant Exercise, Amount  
Balance as of March 31, 2026, Number (in Shares)  
Balance as of March 31, 2026, Amount  
Old Xanadu Common Shares [Member] | Common Stock [Member]    
Shareholders' Equity - Schedule of Changes in Issued and Outstanding Common Shares and Share Capital (Details) [Line Items]    
Balance as of December 31, 2025 as adjusted, Number (in Shares) [1] 55,964,876  
Balance as of December 31, 2025 as adjusted, Amount [1] $ 7,585  
Issuance upon exercise of stock options, Number (in Shares) 137,683
Issuance upon exercise of stock options, Amount $ 76
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Number (in Shares) (55,964,876)  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Amount $ (7,585)  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Number (in Shares)  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Amount  
Earn-out share liability at Closing of Reverse Recapitalization, Amount  
Warrant Exercise, Number (in Shares)  
Warrant Exercise, Amount  
Balance as of March 31, 2026, Number (in Shares)  
Balance as of March 31, 2026, Amount  
Class A Multiple Voting shares [Member] | Common Stock [Member]    
Shareholders' Equity - Schedule of Changes in Issued and Outstanding Common Shares and Share Capital (Details) [Line Items]    
Balance as of December 31, 2025 as adjusted, Number (in Shares) [1]  
Balance as of December 31, 2025 as adjusted, Amount [1]  
Issuance upon exercise of stock options, Number (in Shares)  
Issuance upon exercise of stock options, Amount  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Number (in Shares) 254,709,401  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Amount $ 220,098  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Number (in Shares)  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Amount  
Earn-out share liability at Closing of Reverse Recapitalization, Amount  
Warrant Exercise, Number (in Shares) 517,527  
Warrant Exercise, Amount $ 1,397  
Balance as of March 31, 2026, Number (in Shares) 255,226,928  
Balance as of March 31, 2026, Amount $ 221,495  
Class B Subordinate Voting Shares and Share Capital [Member] | Common Stock [Member]    
Shareholders' Equity - Schedule of Changes in Issued and Outstanding Common Shares and Share Capital (Details) [Line Items]    
Balance as of December 31, 2025 as adjusted, Number (in Shares) [1]  
Balance as of December 31, 2025 as adjusted, Amount [1]  
Issuance upon exercise of stock options, Number (in Shares) 1,789,955  
Issuance upon exercise of stock options, Amount $ 1,181  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Number (in Shares) 1,185,544  
Issuance of common stock upon exchange of Old Xanadu’s preferred and common stock, Amount $ 489  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Number (in Shares) 40,308,937  
Reverse Recapitalization and PIPE transaction, net of transaction costs, Amount $ 265,006  
Earn-out share liability at Closing of Reverse Recapitalization, Amount $ (9,997)  
Warrant Exercise, Number (in Shares)  
Warrant Exercise, Amount  
Balance as of March 31, 2026, Number (in Shares) 43,284,436  
Balance as of March 31, 2026, Amount $ 256,679  
[1] Refer to note in the table above for information related to the prior period recast.