Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) LetterOfCredit Segment	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments | Segment			1
Number of letters of credit issued to landlord constituting restricted cash | LetterOfCredit			2
Number of operating segments | Segment			1
Restricted cash	$ 351,000	$ 216,000	$ 351,000	$ 216,000	$ 351,000
Impairment of long-lived assets	0	$ 0	0	$ 0
Operating lease right-of-use assets	2,296,000		2,296,000		2,722,000
Lease liabilities	$ 605,000		605,000		$ 565,000
Total annual gross revenues			1,235,000,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Issued nonconvertible debt			1,000,000,000.0
Market value of its stock held by non-affiliates			$ 700,000,000