Loans - Information on the risk rating of loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 526,457	$ 561,003
Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,003	2,885
Risk Rated 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	490,480	535,128
Risk Rated 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	30,644	20,632
Risk Rated 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,333	5,243
Construction and land development
Financing Receivable, Recorded Investment [Line Items]
Total loans	49,149	29,569
Construction and land development | Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,805	8,103
Construction and land development | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	42,344	21,466
Construction and land development | Risk Rated 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	46,512	29,473
Construction and land development | Risk Rated 1-4 | Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,805	8,103
Construction and land development | Risk Rated 1-4 | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	39,707	21,370
Construction and land development | Risk Rated 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,637	96
Construction and land development | Risk Rated 5 | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,637	96
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	255,537	231,224
Commercial real estate | Owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	113,108	99,784
Commercial real estate | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	129,786	121,184
Commercial real estate | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,666	9,889
Commercial real estate | Farmland
Financing Receivable, Recorded Investment [Line Items]
Total loans	977	367
Commercial real estate | Risk Rated 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	230,181	214,483
Commercial real estate | Risk Rated 1-4 | Owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	103,370	88,066
Commercial real estate | Risk Rated 1-4 | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	114,168	116,161
Commercial real estate | Risk Rated 1-4 | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,666	9,889
Commercial real estate | Risk Rated 1-4 | Farmland
Financing Receivable, Recorded Investment [Line Items]
Total loans	977	367
Commercial real estate | Risk Rated 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	21,513	13,649
Commercial real estate | Risk Rated 5 | Owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,181	9,405
Commercial real estate | Risk Rated 5 | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	15,332	4,244
Commercial real estate | Risk Rated 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,843	3,092
Commercial real estate | Risk Rated 6 | Owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,557	2,313
Commercial real estate | Risk Rated 6 | Non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	286	779
Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	92,372	86,580
Consumer real estate | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,977	18,394
Consumer real estate | First deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	62,277	57,089
Consumer real estate | Second deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,118	11,097
Consumer real estate | Risk Rated 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	86,478	80,454
Consumer real estate | Risk Rated 1-4 | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,054	17,298
Consumer real estate | Risk Rated 1-4 | First deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	57,932	53,731
Consumer real estate | Risk Rated 1-4 | Second deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,492	9,425
Consumer real estate | Risk Rated 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,657	4,244
Consumer real estate | Risk Rated 5 | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	623	796
Consumer real estate | Risk Rated 5 | First deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,605	2,212
Consumer real estate | Risk Rated 5 | Second deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	429	1,236
Consumer real estate | Risk Rated 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,237	1,882
Consumer real estate | Risk Rated 6 | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	300	300
Consumer real estate | Risk Rated 6 | First deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	740	1,146
Consumer real estate | Risk Rated 6 | Second deed of trust
Financing Receivable, Recorded Investment [Line Items]
Total loans	197	436
Commercial and industrial loans | Commercial and industrial loans (except those secured by real estate)
Financing Receivable, Recorded Investment [Line Items]
Total loans	100,421	181,088
Commercial and industrial loans | Guaranteed student loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	25,975	29,657
Commercial and industrial loans | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,003	2,885
Commercial and industrial loans | Risk Rated 1-4 | Commercial and industrial loans (except those secured by real estate)
Financing Receivable, Recorded Investment [Line Items]
Total loans	98,362	178,217
Commercial and industrial loans | Risk Rated 1-4 | Guaranteed student loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	25,975	29,657
Commercial and industrial loans | Risk Rated 1-4 | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,972	2,844
Commercial and industrial loans | Risk Rated 5 | Commercial and industrial loans (except those secured by real estate)
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,806	2,602
Commercial and industrial loans | Risk Rated 5 | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Total loans	31	41
Commercial and industrial loans | Risk Rated 6 | Commercial and industrial loans (except those secured by real estate)
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 253	$ 269