Commitments and Contingencies - Additional Information (Details)	1 Months Ended		12 Months Ended
	Oct. 31, 2019 USD ($) ft²	Aug. 31, 2019 USD ($) ft²	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Commitments And Contingencies [Line Items]
Lease expiration date	Oct. 31, 2029	Mar. 31, 2024
Number of square feet | ft²	14,750	100,000
Lessee operating lease, rent obligations to commence period		10 months
Lessee, operating lease, term of contract		142 months
Lessee, operating lease, option to extend		Rent obligations commence 10 months thereafter, and the lease term ends 142 months from the date rent commences, subject to our option to twice extend the lease for five years.
Lessee, Operating Lease, Existence of Option to Extend [true false]		true
Lessee, operating lease, extended term of contract		5 years
Landlord contribution for leasehold improvements		$ 20,000,000.0
Letter of credit		$ 2,100,000
Lease term description			The lease term is through March 2026 and provides for one five-year option.
Payments for tenant improvements			$ 2,400,000
Rent expenses			$ 5,300,000	$ 4,100,000	$ 3,700,000
Maximum
Commitments And Contingencies [Line Items]
Tenant improvement allowance	$ 700,000