Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 USD ($) Segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Significant Accounting Policies [Line Items]
Impairment of long-lived assets	$ 0	$ 0
Unrealized gains or losses on foreign currency translation			$ 0
Number of operating segments | Segment	3
Number of reportable segments | Segment	3
Uncertain tax positions	$ 0	$ 0	$ 0
IPO
Significant Accounting Policies [Line Items]
Deferred capitalized offering costs	$ 4,200,000