Loans - Summary of loans by past due status (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	$ 5,820	$ 6
Total Past Due & Nonaccrual Loans	5,847	1,071
Loans Not Past Due	870,131	783,912
Total loans held for investment	875,978	784,983
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	18	1,055
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	9	10
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans held for investment	378,700	344,194
Real Estate | 1 - 4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Loans Not Past Due	31,496	40,753
Total loans held for investment	31,496	40,753
Real Estate | 1 - 4 Family Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | 1 - 4 Family Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | 1 - 4 Family Residential | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	1,034
Loans Not Past Due	263,689	253,818
Total loans held for investment	263,689	254,852
Real Estate | Multifamily | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	1,034
Real Estate | Multifamily | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Multifamily | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Loans Not Past Due	83,515	48,589
Total loans held for investment	83,515	48,589
Real Estate | Commercial Real Estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Commercial Real Estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Commercial Real Estate | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Construction | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Construction | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Real Estate | Construction | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Commercial Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	5,819
Total Past Due & Nonaccrual Loans	5,819	0
Loans Not Past Due	473,035	432,108
Total loans held for investment	478,854	432,108
Commercial Segment | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Commercial Segment | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Commercial Segment | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	1	6
Total Past Due & Nonaccrual Loans	28	37
Loans Not Past Due	18,396	8,644
Total loans held for investment	18,424	8,681
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	18	21
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	9	10
Consumer | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due & Nonaccrual Loans	$ 0	$ 0