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Income Taxes - Reconciliation of Income Taxes at Statutory Rate (Details)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Abstract]    
Tax benefit at federal statutory rate 21.00% 21.00%
State tax expense, net of federal benefit 1.30% 0.80%
Foreign tax expense 8.10% 0.80%
NOL carryforwards expiring unutilized (5.50%) (22.80%)
Change in valuation allowance (21.90%) 17.10%
Federal R&D credit 0.20% 0.20%
Unrecognized tax benefit 0.00% 0.90%
Non-deductible interest/premium 0.00% (0.30%)
Non-deductible loss on Forward Sale of Preferred Stock and Bridge Loans 0.00% (8.00%)
R&D tax credits expiring unutilized 0.00% (5.20%)
Transaction costs (1.50%) 0.00%
Executive stock-based compensation (2.60%) (0.80%)
Return to provision 2.50% 0.00%
Other, net (2.00%) (2.20%)
Effective tax rate (0.40%) 1.50%