Loans - Summary of Loans by Credit Quality Indicator (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 403,342	$ 364,729
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	370,782	324,360
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,054	18,711
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,758	12,718
Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10,748	8,940
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	135,975	123,933
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	128,121	114,608
Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,481	5,959
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,306	2,203
Commercial [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,067	1,163
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	208,979	194,754
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	195,891	176,547
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,344	7,313
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,452	10,186
Commercial Real Estate [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,292	708
Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	58,388	46,042
Construction & Land Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	46,770	33,205
Construction & Land Development [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,229	5,439
Construction & Land Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		329
Construction & Land Development [Member] | Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 5,389	$ 7,069