Unaudited Condensed Consolidated Financial Statements - Additional Information (Detail) - ASU 2019-12 [Member]	Sep. 30, 2021
Condensed Financial Statements Captions [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect	true