Investment Securities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Available for sale
Total investment securities available for sale, Amortized Cost	$ 68,939	$ 68,181
Total investment securities available for sale, Gross Unrealized Gains	56	185
Total investment securities available for sale, Gross Unrealized Losses	2,109	763
Available-for-sale securities, investment securities, Fair Value	66,886	67,603
US government agencies [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	8,981	8,749
Total investment securities available for sale, Gross Unrealized Gains	2	1
Total investment securities available for sale, Gross Unrealized Losses	349	97
Available-for-sale securities, investment securities, Fair Value	8,634	8,653
SBA securities [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	3,635	4,087
Total investment securities available for sale, Gross Unrealized Gains
Total investment securities available for sale, Gross Unrealized Losses	163	24
Available-for-sale securities, investment securities, Fair Value	3,472	4,063
State and political subdivisions [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	8,460	11,242
Total investment securities available for sale, Gross Unrealized Gains	39	179
Total investment securities available for sale, Gross Unrealized Losses	127	25
Available-for-sale securities, investment securities, Fair Value	8,372	11,396
Asset-backed securities [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	6,583
Total investment securities available for sale, Gross Unrealized Gains	13
Total investment securities available for sale, Gross Unrealized Losses	10
Available-for-sale securities, investment securities, Fair Value	6,586
Mortgage-backed securities [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	41,280	44,103
Total investment securities available for sale, Gross Unrealized Gains	2	5
Total investment securities available for sale, Gross Unrealized Losses	1,460	617
Available-for-sale securities, investment securities, Fair Value	39,822	43,491
Mortgage-backed securities [Member] | FHLMC [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	8,012	9,102
Total investment securities available for sale, Gross Unrealized Gains
Total investment securities available for sale, Gross Unrealized Losses	361	149
Available-for-sale securities, investment securities, Fair Value	7,651	8,953
Mortgage-backed securities [Member] | FNMA [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	30,100	29,383
Total investment securities available for sale, Gross Unrealized Gains	1	3
Total investment securities available for sale, Gross Unrealized Losses	933	386
Available-for-sale securities, investment securities, Fair Value	29,168	29,000
Mortgage-backed securities [Member] | GNMA [Member]
Available for sale
Total investment securities available for sale, Amortized Cost	3,168	5,618
Total investment securities available for sale, Gross Unrealized Gains	1	2
Total investment securities available for sale, Gross Unrealized Losses	166	82
Available-for-sale securities, investment securities, Fair Value	$ 3,003	$ 5,538