Federal Home Loan Bank Advances - Summary of Federal Home Loan Bank Advances (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances [Line Items]
FHLB Advances, total	$ 56,951	$ 55,442
Fixed rate, fixed term advance, maturing February 2022 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate		1.62%
FHLB Advances, total		$ 6,500
Fixed rate, fixed term advance, maturing February 2023 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	1.62%	1.62%
FHLB Advances, total	$ 6,500	$ 6,500
Fixed rate, fixed term advance, maturing July 2027 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	2.90%
FHLB Advances, total	$ 5,000
Putable advance, maturing October 2029 first option date Nov 2020 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate		1.03%
FHLB Advances, total		$ 10,000
Putable advance, maturing February 2030 first option date Feb 2023 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	0.98%	0.98%
FHLB Advances, total	$ 5,000	$ 5,000
Putable advance, maturing March 2030 first option date March 2025 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	0.89%	0.89%
FHLB Advances, total	$ 10,000	$ 10,000
Putable advance, maturing Mar 2032 first put option date Mar 2027 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	1.74%
FHLB Advances, total	$ 10,000
Putable advance, maturing July 2029 first put option date January 2023 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	1.68%
FHLB Advances, total	$ 5,000
Advance structured note, payments due monthly, maturing February 2030 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	0.00%	7.47%
FHLB Advances, total		$ 542
Advance structured note, payments due monthly, maturing April 2030 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	1.05%	1.05%
FHLB Advances, total	$ 7,679	$ 8,405
Advance structured note, payments due monthly, maturing May 2030 [Member]
Federal Home Loan Bank, Advances [Line Items]
FHLB advances, interest rate	1.19%	1.19%
FHLB Advances, total	$ 7,772	$ 8,495