Annual report [Section 13 and 15(d), not S-K Item 405]

Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Company's Effective Income Tax Rate (Details)

v3.26.1
Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Company's Effective Income Tax Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Effective Income Tax Rate Reconciliation [Line Items]    
U.S. Statutory Tax Rate Amount $ (35,304) $ (24,331)
U.S. Statutory Tax Rate Percent 21.00% 21.00%
State and Local Income Taxes, Net of Federal Income Tax Effect Amount [1] $ 0 $ 0
State and Local Income Taxes, Net of Federal Income Tax Effect Percent [1] 0.00% 0.00%
Foreign Tax Effects Amount $ 24 $ (4)
Foreign Tax Effects Percent 0.00% 0.00%
Effect of Cross-Border Tax Laws amount $ 94 $ 6
Effect of Cross-Border Tax Laws Percent (0.10%) 0.00%
Tax Credits amount $ (9,489) $ (5,769)
Tax Credits 5.60% 5.00%
Change in Valuation Allowances (Domestic) amount $ 43,489 $ 29,176
Change in Valuation Allowances (Domestic) percent (25.90%) (25.20%)
Nontaxable or Nondeductible Items amount $ 983 $ 951
Nontaxable or Nondeductible Items percent (0.60%) (0.80%)
Other Adjustments amount $ 203 $ (29)
Other Adjustments percent 0.00% 0.00%
Actual income tax benefit effective tax rate amount $ 0 $ 0
Actual income tax benefit effective tax rate percent 0.00% 0.00%
[1] Within the State Income Tax category, Pennsylvania and Philadelphia accounted for the majority, representing over 50% of the total reconciling impact.