Investment Securities (Schedule of amortized cost and estimated fair value of securities with gross unrealized gains and losses - AFS) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 18,026	$ 18,563
Gross Unrealized Gains	18	31
Gross Unrealized Losses	(44)	(263)
Fair Value	18,000	18,331
U.S. Government and agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,610	12,610
Gross Unrealized Gains	1	7
Gross Unrealized Losses	(14)	(162)
Fair Value	13,597	12,455
Mortgage-backed securities - residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,416	5,953
Gross Unrealized Gains	17	24
Gross Unrealized Losses	(30)	(101)
Fair Value	$ 4,403	$ 5,876

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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-Section 50
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Amount, before tax, of unrealized loss 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).

+ References

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
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Amount of 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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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