Allowance for Loan Losses - Summary of Credit Exposure for the Loan Portfolio Disaggregated by Loan Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	$ 570,238	$ 1,230,391
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	562,640	1,220,490
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	2,020	5,608
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	5,578	4,220
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	73
Real Estate- Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	87,235	64,724
Real Estate- Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	87,233	64,593
Real Estate- Residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Real Estate- Residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	2	131
Real Estate- Residential | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Real Estate- Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	163,477	114,884
Real Estate- Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	160,492	112,260
Real Estate- Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	170	431
Real Estate- Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	2,815	2,193
Real Estate- Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Real Estate - Construction and Land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	18,632	15,113
Real Estate - Construction and Land | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	18,632	15,113
Real Estate - Construction and Land | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Real Estate - Construction and Land | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Real Estate - Construction and Land | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	217,155	193,927
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	212,544	186,781
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	1,850	5,177
Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	2,761	1,896
Commercial and industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	73
Commercial and industrial - PPP
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	80,158	838,847
Commercial and industrial - PPP | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	80,158	838,847
Commercial and industrial - PPP | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Commercial and industrial - PPP | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Commercial and industrial - PPP | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	3,581	2,896
Consumer and other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	3,581	2,896
Consumer and other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Consumer and other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	0	0
Consumer and other | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, gross	$ 0	$ 0