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Fair Value Measurements and Disclosures - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	$ 224,763	$ 247,171
Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,903	4,389
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	221,860	242,782
Mortgage-backed securities - U.S. government sponsored enterprise (GSEs) [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	170,445	190,545
Mortgage-backed securities - U.S. government sponsored enterprise (GSEs) [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	170,445	190,545
Mortgage-backed securities - U.S. government sponsored enterprise (GSEs) [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value
Mortgage-backed securities - U.S. government sponsored enterprise (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	170,445	190,545
Mortgage-backed securities - U.S. government sponsored enterprise (GSEs) [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	0	0
US Government Agencies Debt Securities [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	10,341	10,200
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	10,341	10,200
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value		0
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	10,341	10,200
US Government Agencies Debt Securities [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	0	0
US States and Political Subdivisions Debt Securities [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	39,587	39,730
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	39,587	39,730
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value
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	39,587	39,730
US States and Political Subdivisions Debt Securities [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	0	0
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	1,487	1,857
Small Business Association (SBA) securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value
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	1,487	1,857
Small Business Association (SBA) securities [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	0	0
U.S. treasury securities [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,903	4,839
U.S. treasury securities [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,903	4,839
U.S. treasury securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	2,903	4,839
U.S. treasury 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	0	0
U.S. treasury securities [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	0	0
Mortgage Servicings Rights [Member] | Fair Value, Recurring [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	835	1,060
Mortgage Servicings Rights [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Recurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Mortgage Servicings Rights [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	835	1,060
Mortgage Servicings Rights [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	$ 0	$ 0

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