Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2019
Summary Of Significant Accounting Policies [Line Items]
Right-of-use assets	$ 61,593,000	$ 62,466,000		$ 5,580,000	$ 5,580
Lease liability	53,129,000	53,454,000		$ 5,897,000	5,897,000
Deficit	$ (261,637,000)	$ (250,548,000)			$ 317,000
Change In Accounting Principle Accounting Standards Update Adopted				true
Accounting Standards Update No. 2016-02
Summary Of Significant Accounting Policies [Line Items]
Deficit				$ 317,000
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect				true
Accounting Standards Update No. 2016-13
Summary Of Significant Accounting Policies [Line Items]
Change In Accounting Principle Accounting Standards Update Adopted	true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2020
Accounting Standards Update No. 2017-04
Summary Of Significant Accounting Policies [Line Items]
Change In Accounting Principle Accounting Standards Update Adopted			true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect			true
Accounting Standards Update No. 2019-12
Summary Of Significant Accounting Policies [Line Items]
Change In Accounting Principle Accounting Standards Update Adopted	true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2021