Operating Leases - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2020 USD ($) ft²
Disclosure of Operating Leases [Line Items]
Finance Lease Obligations | $	$ 0
Lessor, Operating Lease, Option to Extend	1 year
Lessor, Operating Lease, Option to Terminate	1 year
Before agreement of company leased spaces	7,800
After agreement of company leased spaces	10,700