Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) Segment	Dec. 31, 2020 USD ($)	Jan. 01, 2021 USD ($)
Basis Of Presentation And Significant Accounting Policies [Line Items]
Number of operating segment | Segment		1
Impairments of long-lived assets		$ 0
Interest or penalties charged in relation to unrecognized tax benefits		0
Foreign currency translation adjustment		(5,000)	$ 9,000
Operating lease right-of-use assets		20,333,000
Lease liabilities		$ 34,589,000
ASU 2018-15 [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Change in accounting principle, ASU adopted		true
Change in accounting principle, ASU, adoption date		Jan. 01, 2021
Change in accounting principle, ASU, Immaterial effect		true
ASU 2016-02 [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Change in accounting principle, ASU adopted		true
Change in accounting principle, ASU, adoption date		Jan. 01, 2021
Change in accounting principle, ASU, Immaterial effect		true
Operating lease right-of-use assets				$ 500,000
Lease liabilities				600,000
Derecognition of deferred rent liability				1,400,000
Recognition of liability related to reallocation of consideration of lease pending commencement of second lease component				$ 1,300,000
Operating lease additional rent expense	$ 100,000
ASU 2016-13 [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Change in accounting principle, ASU adopted		true
Change in accounting principle, ASU, adoption date		Jan. 01, 2021
Change in accounting principle, ASU, Immaterial effect		true
Interest and Other Income (Expense), Net [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Non-recurring grant income		$ 135,000	$ 0