Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Foreclosed assets	$ 0	$ 0
Reorganization Cost And Issuing Of Common Stock Deferred	2,000.0
Other comprehensive income (loss) tax	3,000	276,000
Unrealized Gain (Loss) Marketable Securities	222,000	568,000
Increase in assets and liabilities	$ 507,000
Common Stock Held By Public	100.00%
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Annual gross revenue benchmark to qualify as emerging growth company	$ 1,000,000,000.0
Period for company qualifies as emerging growth company from completion of stock offering	5 years
Residential Real Estate [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans in process of foreclosure	$ 52	$ 56