Investment Securities - Summary of Debt and Equity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Securities available-for-sale:
Amortized Cost	$ 126,435	$ 97,851
Gross Unrealized Gain	2,661	184
Gross Unrealized Loss	(114)	(469)
Securities available-for-sale, at fair value	128,982	97,566
Securities held-to-maturity:
Amortized Cost	0	20,154
Gross Unrealized Gain		407
Gross Unrealized Loss		(81)
Fair Value		20,480
Pledged securities for collateral	100,300	99,300
Residential mortgage-backed securities
Securities available-for-sale:
Amortized Cost	78,289	38,793
Gross Unrealized Gain	1,504	96
Gross Unrealized Loss	(22)	(151)
Securities available-for-sale, at fair value	79,771	38,738
Securities held-to-maturity:
Amortized Cost		15,215
Gross Unrealized Gain		70
Gross Unrealized Loss		(81)
Fair Value		15,204
Residential collateralized mortgage obligations
Securities available-for-sale:
Amortized Cost	30,430	44,115
Gross Unrealized Gain	312	36
Gross Unrealized Loss	(69)	(257)
Securities available-for-sale, at fair value	30,673	43,894
SBA loan pool securities
Securities available-for-sale:
Amortized Cost	12,335	14,179
Gross Unrealized Gain	395	34
Gross Unrealized Loss	(23)	(61)
Securities available-for-sale, at fair value	12,707	14,152
Municipal bonds
Securities available-for-sale:
Amortized Cost	5,381	764
Gross Unrealized Gain	450	18
Gross Unrealized Loss	0	0
Securities available-for-sale, at fair value	$ 5,831	782
Securities held-to-maturity:
Amortized Cost		4,939
Gross Unrealized Gain		337
Gross Unrealized Loss		0
Fair Value		$ 5,276

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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