Summary of Significant Accounting Policies - Property and Equipment (Details)	Dec. 31, 2023
Equipment leasing
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	4 years 6 months
AviClear devices
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	7 years
Office equipment and furniture
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years