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Income Taxes - Schedule of Reconciliation of Income Tax Benefit at Statutory Federal Income Tax Rate (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of Income Tax Benefit at Statutory Federal Income Taxes    
US federal statutory tax rate $ (16,927) $ (14,940)
State and local income taxes, net of federal income tax effect (118) (326)
Tax Credits    
R&D Credits (2,408) (2,322)
Change in valuation allowance 18,364 16,080
Nontaxable or nondeductible items    
Other 487 599
Change in unrecognized tax benefit 572 906
Other 26 0
Provision for income tax benefit $ 0 $ 0
Reconciliation of Income Tax Benefit at Statutory Federal Income Tax Rate    
US federal statutory rate, percentage 21.00% 21.00%
State amd local income taxes, net of federal income tax effect, percentage 0.10% 0.50%
Tax Credits    
R&D Credits, percentage 3.00% 3.30%
Change in valuation allowance, percentage (22.80%) (22.60%)
Nontaxable or nondeductible items    
Other, percentage (0.60%) (0.80%)
Change in unrecognized tax benefit, percentage (0.70%) (1.30%)
Other, percentage (0.00%) 0.00%
Provision for income tax benefit, percentage 0.00% 0.00%
Australia    
Reconciliation of Income Tax Benefit at Statutory Federal Income Taxes    
Statutory tax rate difference between Australia and United States $ (2) $ (1)
Tax Credits    
Change in valuation allowance 89 4
Nontaxable or nondeductible items    
Other $ (83) $ 0
Reconciliation of Income Tax Benefit at Statutory Federal Income Tax Rate    
Statutory tax rate difference between Australia and United States, percentage 0.00% 0.00%
Tax Credits    
Change in valuation allowance, percentage (0.10%) 0.00%
Nontaxable or nondeductible items    
Other, percentage 0.10% 0.00%