Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Operating leases renewal terms (up to)	5 years		5 years
Finance leases renewal terms (up to)	5 years		5 years
Lease term (in years)	3 years		3 years
Duration of autorenewal features			1 year
Sales and marketing
Lessee, Lease, Description [Line Items]
Amortization expense	$ 0.4	$ 0.6	$ 1.0	$ 1.3
AviClear Device
Lessee, Lease, Description [Line Items]
Cloud computing arrangement expected contract renewals (in years)	7 years		7 years
Capitalized Cloud Computing Set-up Cost | Other long-term assets
Lessee, Lease, Description [Line Items]
Capitalized contract costs	$ 1.9		$ 1.9		$ 2.7
Capitalized Cloud Computing Set-up Cost | Sales and marketing
Lessee, Lease, Description [Line Items]
Amortization expense	0.5	1.1	0.8	2.2
Lease Installment Costs | Other long-term assets
Lessee, Lease, Description [Line Items]
Capitalized contract costs	1.1		1.1		$ 2.1
Lease Installment Costs | Sales and marketing
Lessee, Lease, Description [Line Items]
Amortization expense	$ 0.4	$ 0.5	$ 1.0	$ 1.0
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms of operating leases	1 year		1 year
Remaining lease terms of finance leases	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms of operating leases	7 years		7 years
Remaining lease terms of finance leases	7 years		7 years