Summary of Significant Accounting Policies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Change in Accounting Principle, Accounting Standards Update, Adopted	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect	true
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201813Member