Loans - Schedule of Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	$ 15,352	$ 10,050
Provision for loan losses	(16)	743
Charge-offs		(45)
Recoveries	3
Ending balance	15,339	10,748
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	8,505	6,000
Provision for loan losses	89	210
Ending balance	8,594	6,210
SBA Loans-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,802	939
Provision for loan losses	228	143
Ending balance	2,030	1,082
SBA Loans—Non-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	278	121
Provision for loan losses	14	116
Charge-offs		(45)
Ending balance	292	192
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	2,563	1,289
Provision for loan losses	(232)	3
Ending balance	2,331	1,292
Home Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	2,185	1,667
Provision for loan losses	(110)	254
Ending balance	2,075	1,921
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	19	34
Provision for loan losses	(5)	17
Recoveries	3
Ending balance	$ 17	$ 51