v3.25.4
Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Operating Loss Carryforwards [Line Items]    
U.S federal statuory tax rate, Percent   30.18%
Statutory Tax Rate Difference, Amount   $ 4,589
Changes in Valuation Allowances, Amount   49,547
Changes in unrecognized tax benefits $ 1,517  
Changes in unrecognized tax benefits, Percent 0.23%  
Effect of deferred tax adjustments, Amount $ 3,276  
Effect of deferred tax adjustments, Percent (0.50%)  
Other, Amount $ 341  
Other, Percent (0.05%)  
Total income tax benefit (provision) $ 298 $ (356)
Effective income tax rate: (0.05%) 0.25%
Total loss before income taxes:   $ (148,405)
Expected income tax expense (benefit)   (44,781)
US state income taxes, net of US federal tax benefit   (1,010)
Effect of Australian R&D tax credit incentives   (134)
Effect of consolidation and deconsolidation of subsidiaries   88
Effect of share-based compensation expense   305
Compensation expenses not deductible under IRC Section 162(m)   975
Expenses not deductible for tax purposes   525
Return to provision and deferred tax adjustments   (10,438)
Uncertain Tax Positions   (22)
Federal Ministry of Finance, Germany [Member]    
Operating Loss Carryforwards [Line Items]    
Total loss before income taxes:   (96,160)
Domestic Tax Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
U.S federal statuory tax rate, Amount $ (138,572)  
U.S federal statuory tax rate, Percent 21.00%  
Changes in Valuation Allowances, Amount $ 9,981  
Changes in Valuation Allowances, Percent (1.51%)  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
State and local income tax, net of national income tax effect, Amount [1] $ 141  
State and local income tax, net of national income tax effect, Percent [1] (0.02%)  
Foreign Tax Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
Total loss before income taxes:   $ (52,245)
Foreign Tax Jurisdiction [Member] | Germany [Member]    
Operating Loss Carryforwards [Line Items]    
Statutory Tax Rate Difference, Amount $ (1,529)  
Statutory Tax Rate Difference, Percent 0.23%  
Changes in Valuation Allowances, Amount $ (22,485)  
Changes in Valuation Allowances, Percent 3.41%  
Effect of change of domicile $ 27,581  
Effect of change of domicile (4.18%)  
Other, Amount $ (1,585)  
Other, Percent 0.24%  
Foreign Tax Jurisdiction [Member] | Canada [Member]    
Operating Loss Carryforwards [Line Items]    
Changes in Valuation Allowances, Amount $ (454)  
Changes in Valuation Allowances, Percent 0.07%  
Other, Amount $ 14  
Other, Percent (0.00%)  
Deferred tax adjustments, Amount $ 572  
Deferred tax adjustments, Percent (0.09%)  
Foreign Tax Jurisdiction [Member] | United Kingdom [Member]    
Operating Loss Carryforwards [Line Items]    
Statutory Tax Rate Difference, Amount $ (21,050)  
Statutory Tax Rate Difference, Percent 3.19%  
Changes in Valuation Allowances, Amount $ 16,814  
Changes in Valuation Allowances, Percent (2.55%)  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Research and Development, Amount $ 131,750  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Research and Development, Percent (19.97%)  
Effect of change of domicile $ (15,869)  
Effect of change of domicile 2.40%  
Other, Amount $ (1,007)  
Other, Percent 0.15%  
Foreign Tax Jurisdiction [Member] | Netherlands [Member]    
Operating Loss Carryforwards [Line Items]    
Changes in Valuation Allowances, Amount $ 747  
Changes in Valuation Allowances, Percent (0.11%)  
Other, Amount $ 9,993  
Other, Percent (1.51%)  
Other international jurisdictions [Member]    
Operating Loss Carryforwards [Line Items]    
Statutory Tax Rate Difference, Amount $ 123  
Statutory Tax Rate Difference, Percent (0.02%)  
[1] California, New York State, and New York City make up the majority (greater than 50%) of the tax effect in this category