Fair Value Measurements - Schedule of Hierarchy and Fair Value for Each Major Category of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value Measurements, Recurring Basis
Assets measured at fair value:
Assets measured at fair value	$ 126,069	$ 73,762
Fair Value Measurements, Recurring Basis | Government Agency Securities
Assets measured at fair value:
Assets measured at fair value	1,572	1,815
Fair Value Measurements, Recurring Basis | SBA Agency Securities
Assets measured at fair value:
Assets measured at fair value	4,691	5,169
Fair Value Measurements, Recurring Basis | Mortgage-Backed Securities
Assets measured at fair value:
Assets measured at fair value	19,171	22,541
Fair Value Measurements, Recurring Basis | Collateralized Mortgage Obligations
Assets measured at fair value:
Assets measured at fair value	11,654	12,066
Fair Value Measurements, Recurring Basis | Commercial Paper
Assets measured at fair value:
Assets measured at fair value	69,898	14,918
Fair Value Measurements, Recurring Basis | Corporate Debt Securities
Assets measured at fair value:
Assets measured at fair value	19,083	17,253
Fair Value Measurements, Nonrecurring Basis
Assets measured at fair value:
Assets measured at fair value	293	1,224
Fair Value Measurements, Nonrecurring Basis | Commercial Real Estate | Collateral Dependent Impaired Loans
Assets measured at fair value:
Assets measured at fair value		123
Fair Value Measurements, Nonrecurring Basis | Other Real Estate Owned
Assets measured at fair value:
Assets measured at fair value	293	1,101
Fair Value Measurements Using Level 2 | Fair Value Measurements, Recurring Basis
Assets measured at fair value:
Assets measured at fair value	126,069	73,762
Fair Value Measurements Using Level 2 | Fair Value Measurements, Recurring Basis | Government Agency Securities
Assets measured at fair value:
Assets measured at fair value	1,572	1,815
Fair Value Measurements Using Level 2 | Fair Value Measurements, Recurring Basis | SBA Agency Securities
Assets measured at fair value:
Assets measured at fair value	4,691	5,169
Fair Value Measurements Using Level 2 | Fair Value Measurements, Recurring Basis | Mortgage-Backed Securities
Assets measured at fair value:
Assets measured at fair value	19,171	22,541
Fair Value Measurements Using Level 2 | Fair Value Measurements, Recurring Basis | Collateralized Mortgage Obligations
Assets measured at fair value:
Assets measured at fair value	11,654	12,066
Fair Value Measurements Using Level 2 | Fair Value Measurements, Recurring Basis | Commercial Paper
Assets measured at fair value:
Assets measured at fair value	69,898	14,918
Fair Value Measurements Using Level 2 | Fair Value Measurements, Recurring Basis | Corporate Debt Securities
Assets measured at fair value:
Assets measured at fair value	19,083	17,253
Fair Value Measurements Using Level 3 | Fair Value Measurements, Nonrecurring Basis
Assets measured at fair value:
Assets measured at fair value	293	1,224
Fair Value Measurements Using Level 3 | Fair Value Measurements, Nonrecurring Basis | Commercial Real Estate | Collateral Dependent Impaired Loans
Assets measured at fair value:
Assets measured at fair value		123
Fair Value Measurements Using Level 3 | Fair Value Measurements, Nonrecurring Basis | Other Real Estate Owned
Assets measured at fair value:
Assets measured at fair value	$ 293	$ 1,101