Loans and Allowance for Credit Losses - Loans - Credit Quality Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) contract	Dec. 31, 2020 USD ($) contract	Dec. 31, 2019 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 210,392	$ 253,772
Non-accrual	338	4,512	$ 4,127
Troubled debt restructures	$ 36	$ 39
Number of TDRs accounts | contract	1	1
Loans and Leases Receivable, Gross	$ 210,392	$ 253,772
Non-performing TDRs
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructures		$ 39
Number of TDRs accounts | contract		1
Non-performing TDRs	36
Number of non-performing TDRs accounts | contract	1
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 206,611	$ 248,858
Loans and Leases Receivable, Gross	206,611	248,858
Special mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,447
Loans and Leases Receivable, Gross	3,447
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	244	4,798
Loans and Leases Receivable, Gross	244	4,798
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	90	116
Loans and Leases Receivable, Gross	90	116
Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Total loans	136,705	148,555
Non-accrual	123	4,299
Loans and Leases Receivable, Gross	136,705	148,555
Real Estate Loan | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	133,145	143,854
Loans and Leases Receivable, Gross	133,145	143,854
Real Estate Loan | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,437
Loans and Leases Receivable, Gross	3,437
Real Estate Loan | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans		402
Loans and Leases Receivable, Gross		402
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,447	27,912
Non-accrual	71
Loans and Leases Receivable, Gross	17,447	27,912
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,376	27,912
Loans and Leases Receivable, Gross	17,376	27,912
Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	56,240	77,305
Loans and Leases Receivable, Gross	56,240	77,305
Consumer Loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	56,091	77,092
Loans and Leases Receivable, Gross	56,091	77,092
Consumer Loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	5
Loans and Leases Receivable, Gross	5
Construction And Land Development [Member] | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,087	2,553
Loans and Leases Receivable, Gross	4,087	2,553
Construction And Land Development [Member] | Real Estate Loan | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,072	2,553
Loans and Leases Receivable, Gross	4,072	2,553
Construction And Land Development [Member] | Real Estate Loan | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	15
Loans and Leases Receivable, Gross	15
Farmland | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Total loans	342	350
Loans and Leases Receivable, Gross	342	350
Farmland | Real Estate Loan | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	342	350
Loans and Leases Receivable, Gross	342	350
Single-family | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Total loans	78,119	82,520
Non-accrual	123	270	790
Troubled debt restructures	$ 36	$ 39
Number of TDRs accounts | contract	1	1
Loans and Leases Receivable, Gross	$ 78,119	$ 82,520
Single-family | Real Estate Loan | Non-performing TDRs
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructures		$ 39
Number of TDRs accounts | contract		1
Non-performing TDRs	36
Number of non-performing TDRs accounts | contract	1
Single-family | Real Estate Loan | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 77,996	$ 82,310
Loans and Leases Receivable, Gross	77,996	82,310
Single-family | Real Estate Loan | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	123	210
Loans and Leases Receivable, Gross	123	210
Multi-family | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,428	6,105
Non-accrual			24
Loans and Leases Receivable, Gross	5,428	6,105
Multi-family | Real Estate Loan | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,428	6,105
Loans and Leases Receivable, Gross	5,428	6,105
Commercial | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,729	57,027
Non-accrual		4,029	3,139
Loans and Leases Receivable, Gross	48,729	57,027
Commercial | Real Estate Loan | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	45,307	52,534
Loans and Leases Receivable, Gross	45,307	52,534
Commercial | Real Estate Loan | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,422
Loans and Leases Receivable, Gross	3,422
Commercial | Real Estate Loan | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans		4,493
Loans and Leases Receivable, Gross		4,493
Commercial | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,447	27,912
Loans and Leases Receivable, Gross	17,447	27,912
Commercial | Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,003
Loans and Leases Receivable, Gross	10,003
Commercial | Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	56,240	77,305
Non-accrual	144	213
Loans and Leases Receivable, Gross	56,240	77,305
Commercial and industrial | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,003	10,800
Loans and Leases Receivable, Gross	10,003	10,800
Commercial and industrial | Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans		10,800
Loans and Leases Receivable, Gross		10,800
SBA Guaranty | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Non-accrual	71
SBA Guaranty | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,397	7,200
Non-accrual	71
Loans and Leases Receivable, Gross	6,397	7,200
SBA Guaranty | Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,326	7,200
Loans and Leases Receivable, Gross	6,326	7,200
SBA Guaranty | Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	71
Loans and Leases Receivable, Gross	71
Comm SBA PPP
Financing Receivable, Recorded Investment [Line Items]
Total loans		10,000
Loans and Leases Receivable, Gross		10,000
Comm SBA PPP | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,047	9,912
Loans and Leases Receivable, Gross	1,047	9,912
Comm SBA PPP | Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,047	9,912
Loans and Leases Receivable, Gross	1,047	9,912
Consumer and Indirect | Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,090	3,063
Non-accrual		34	51
Loans and Leases Receivable, Gross	2,090	3,063
Consumer and Indirect | Consumer Loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,084	3,030
Loans and Leases Receivable, Gross	2,084	3,030
Consumer and Indirect | Consumer Loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	6
Loans and Leases Receivable, Gross	6
Consumer and Indirect | Consumer Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans		33
Loans and Leases Receivable, Gross		33
Automobile | Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	54,150	74,242
Non-accrual	144	179	$ 123
Loans and Leases Receivable, Gross	54,150	74,242
Automobile | Consumer Loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	54,006	74,064
Loans and Leases Receivable, Gross	54,006	74,064
Automobile | Consumer Loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	4
Loans and Leases Receivable, Gross	4
Automobile | Consumer Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	50	62
Loans and Leases Receivable, Gross	50	62
Automobile | Consumer Loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	90	116
Loans and Leases Receivable, Gross	$ 90	$ 116