Leases- Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Lease	Sep. 30, 2020 USD ($)	Mar. 31, 2021 ft²
Lessee Lease Description [Line Items]
Number of square feet | ft²					27,000
Rent obligations, commencement date			2021-10
Lease not yet commenced, expiration term thereafter			120 months
Lease not yet commenced, termination option description			subject to an early termination option after the seventh year
Lease not yet commenced, option to extend description			option to twice extend the lease for five years
Lease not yet commenced, option to extend term	5 years		5 years
Lease not yet commenced landlord agreed to fund for improvements	$ 1.2		$ 1.2
ROU assets obtained in exchange for operating lease liabilities			$ 5.4
Lessee, operating lease, option to extend			options to extend certain of the leases for up to 10.0 years
Lessee, Operating Lease, Existence of Option to Extend [true false]			true
Operating lease renewal term	10 years		10 years
Operating lease termination period			3 years
Number of operating lease terminate | Lease			2
Letter of credit	$ 2.1		$ 2.1
Operating lease expense	3.1	$ 1.4	9.3	$ 3.7
Operating lease variable lease expense	$ 0.8	$ 0.7	2.3	1.8
Cash paid for amounts included in measurement of lease liabilities, net of tenant improvement allowances received			5.6	1.8
Cash received for tenant improvement allowances			$ 11.5	$ 1.8
Minimum
Lessee Lease Description [Line Items]
Operating lease remaining lease term	7 months 6 days		7 months 6 days
Maximum
Lessee Lease Description [Line Items]
Operating lease remaining lease term	11 years 10 months 24 days		11 years 10 months 24 days