Leases - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended				12 Months Ended
	Nov. 30, 2019	May 31, 2019	May 31, 2016	Jun. 30, 2015	Dec. 31, 2019
2015 Lease [Member]
Lessee Lease Description [Line Items]
Lease commencement date				Nov. 15, 2015
Lease expiration date				Feb. 28, 2022
2016 Sublease [Member]
Lessee Lease Description [Line Items]
Lease commencement date			Dec. 23, 2016
Lease expiration date			Dec. 31, 2026
Lessee, operating sublease, option to extend					an option to extend the term of the sublease for an additional five-year period if, at the time of expiration of the initial term
Lessee, operating sublease, existence of option to extend			true
Extended term of lease expiration			5 years
2019 Lease [Member]
Lessee Lease Description [Line Items]
Lease commencement date		Jun. 01, 2019
Lease expiration date		Nov. 30, 2026
Extended term of lease expiration		5 years
Lessee, operating lease, option to extend					an option to extend the term of the lease for an additional five-year period based on certain conditions within the Company’s control.
Lessee, operating lease, existence of option to extend		true
2019 Sublease [Member]
Lessee Lease Description [Line Items]
Lease expiration date					Mar. 31, 2024
Lessee, operating sublease, option to extend					an option to extend the term of the sublease for an additional five-year period if, at the time of expiration of the initial term
Lessee, operating sublease, existence of option to extend					true
Extended term of lease expiration					5 years
Lease Arrangement [Member]
Lessee Lease Description [Line Items]
Upfront payment	$ 2.6
Annual rental payments	$ 3.7
Rental payments period	5 years