Fair Value Measurements and Disclosure - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	$ 87,172	$ 83,402
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	85,071	81,341
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,101	2,061
Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	87,172	83,402
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	85,071	81,341
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,101	2,061
Mortgage-backed securities - U.S. Government Sponsored Enterprises (GSEs) [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	35,539	34,915
Mortgage-backed securities - U.S. Government Sponsored Enterprises (GSEs) [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	35,539	34,915
Mortgage-backed securities - U.S. Government Sponsored Enterprises (GSEs) [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	35,539	34,915
US Government Agencies Debt Securities [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	5,181	5,085
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	5,181	5,085
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	5,181	5,085
US States and Political Subdivisions Debt Securities [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	40,538	41,341
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	40,538	41,341
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	40,538	41,341
Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,101	2,061
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,101	2,061
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,101	$ 2,061
Small Business Association (SBA) securities [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	3,363
Small Business Association (SBA) securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	3,363
Subordinated Debentures [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	450
Subordinated Debentures [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	450
Subordinated Debentures [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	$ 450