Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule Of Available For Sale Securities [Line Items]
Within one year, Amortized Cost	$ 3,998
One to five years, Amortized Cost	2,000
Available for sale, Amortized Cost	51,915	$ 56,114
Within one year, Fair Value	3,995
One to five years, Fair Value	1,997
Available for sale, Fair Value	52,295	55,336
Mortgage-backed Securities, Residential
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	12,160	14,465
Available for sale, Fair Value	12,197	$ 14,129
Collateralized Mortgage Obligations
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	33,757
Available for sale, Fair Value	$ 34,106

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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