Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Provision for income tax	$ 284,000	$ 262,000	$ 679,000	$ 502,000
Federal [Member]
Provision for income tax			$ 0