Loans - Summary of Loans by Credit Quality Indicator (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 364,729	$ 414,799
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	123,933	191,540
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	194,754	187,221
Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	46,042	36,038
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	324,360	367,893
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	114,608	177,620
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	176,547	161,091
Pass [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	33,205	29,182
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	18,711	4,897
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,959	2,352
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,313	2,545
Special Mention [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,439
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,718	31,456
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,203	9,644
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10,186	21,812
Substandard [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	329
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		317
Doubtful [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		317
Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,940	10,236
Not Rated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,163	1,924
Not Rated [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	708	1,773
Not Rated [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 7,069	$ 6,539