Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jan. 01, 2022	Dec. 31, 2021
Accounting Policies [Line Items]
Income tax provision	$ 0	$ 0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]			Operating Lease, Right-of-Use Asset
Operating Lease, Right-of-Use Asset	6,275,000		$ 6,800,000	$ 0
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]			us-gaap:OtherLiabilitiesNoncurrent
Operating Lease, Liability	7,847,000		$ 8,500,000
Restructuring lease liability	0		$ 1,600,000	377,000
Money Market Funds [Member]
Accounting Policies [Line Items]
Money market funds	$ 105,300,000			$ 73,800,000