Loans - Schedule of Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	$ 10,050	$ 9,636	$ 9,139
Provision for loan losses	5,318	1,102	1,267
Charge-offs	(45)	(689)	(787)
Recoveries	29	1	17
Ending balance	15,352	10,050	9,636
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	6,000	4,805	4,801
Provision for loan losses	2,505	1,195	4
Ending balance	8,505	6,000	4,805
SBA Loans-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	939	894	1,082
Provision for loan losses	863	734	(188)
Charge-offs		(689)
Ending balance	1,802	939	894
SBA Loans—Non-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	121	505	538
Provision for loan losses	174	(384)	103
Charge-offs	(45)		(153)
Recoveries	28		17
Ending balance	278	121	505
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,289	1,746	1,265
Provision for loan losses	1,274	(457)	1,115
Charge-offs			(634)
Ending balance	2,563	1,289	1,746
Home Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,667	1,653	1,408
Provision for loan losses	518	14	245
Ending balance	2,185	1,667	1,653
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	34	33	45
Provision for loan losses	(16)		(12)
Recoveries	1	1
Ending balance	$ 19	$ 34	$ 33