Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)		12 Months Ended
	Mar. 13, 2023	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Foreclosed assets		$ 0	$ 0
Reorganization Cost And Issuing Of Common Stock Deferred		2,000,000.0
Other comprehensive income (loss) tax		0	3,000
FHLB Advances, total		71,464,000	55,442,000
Unrealized Gain (Loss) Marketable Securities		$ (714,000)	222,000
Common Stock Held By Public		100.00%
ASU 2016-02, ASC 842 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Jan. 01, 2022
ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Jan. 01, 2023
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
Maximum [Member] | ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage increase in allowance for credit losses		20.00%
Amount of Increase in credit loss allowance		$ 640,000
Minimum [Member] | ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage increase in allowance for credit losses		15.00%
Amount of Increase in credit loss allowance		$ 480,000
Residential Real Estate [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans in process of foreclosure		$ 0	$ 52,000
Subsequent Event [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Available Borrowing Capacity	$ 25,000,000
Final maturity date	Mar. 13, 2028
Line of credit facility one time call date	Mar. 13, 2024
Interest rate	3.47%
Subsequent Event [Member] | Mature Within One Month
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
FHLB Advances, total	$ 20,000,000
Subsequent Event [Member] | Advances paid in full as of Filing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
FHLB Advances, total	10,000,000
Subsequent Event [Member] | Putable Fixed Rate Advance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
FHLB Advances, total	$ 5,000,000