Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Loans - Summary of loan composition (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	$ 875,978		$ 784,983
Deferred loan fees and unearned premiums, net	(864)		(466)
Allowance for loan losses	(10,885)	$ (10,271)	(9,076)	$ (8,665)	$ (14,017)	$ (11,402)
Loans held for investment, net	864,229		775,441
Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	378,700		344,194
Real Estate \| 1 - 4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	31,496		40,753
Allowance for loan losses	(238)	(253)	(285)	(309)	(312)	(342)
Real Estate \| Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	263,689		254,852
Allowance for loan losses	(1,927)	(1,916)	(1,789)	(1,692)	(1,418)	(1,278)
Real Estate \| Commercial Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	83,515		48,589
Allowance for loan losses	(937)	(902)	(552)	(599)	(603)	(597)
Commercial Segment
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	478,854		432,108
Allowance for loan losses	(7,463)	(7,045)	(6,319)	(5,932)	(5,547)	(5,003)
Commercial Segment \| SBA paycheck protection program loans
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	0		4,200
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans held for investment	18,424		8,681
Allowance for loan losses	$ (320)	$ (155)	$ (131)	$ (133)	$ (6,137)	$ (4,182)