Segment Reporting (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Segment	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of principal business segments | Segment			3
Revenues [Abstract]
Interest and dividend income	$ 10,133	$ 9,594	$ 20,009	$ 18,393
Total operating income	13,706	13,018	26,998	24,959
Expenses [Abstract]
Interest expense	1,602	1,168	3,119	2,222
Provision for loan losses	787	575	1,013	1,100	$ 2,861
Salaries and employee benefits	5,927	5,935	11,626	11,412
Other expenses	3,581	4,283	7,173	8,222
Total operating expenses	11,897	11,961	22,931	22,956
Income before income taxes	1,809	1,057	4,067	2,003
Income tax expense (benefit)	183	65	414	69
Net income	1,626	992	3,653	1,934
Capital expenditures	181	128	679	317
Total assets	1,029,404	1,032,130	1,029,404	1,032,130	$ 1,038,183
Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	929	916	1,888	1,899
Other Income [Member]
Revenues [Abstract]
Noninterest revenue	2,644	2,508	5,101	4,667
Operating Segments [Member] | Bank [Member]
Revenues [Abstract]
Interest and dividend income	10,101	9,570	19,947	18,348
Total operating income	12,454	11,802	24,488	22,494
Expenses [Abstract]
Interest expense	1,571	1,135	3,057	2,189
Provision for loan losses	787	575	1,013	1,100
Salaries and employee benefits	5,055	5,077	9,873	9,702
Other expenses	3,259	3,559	6,607	6,985
Total operating expenses	10,672	10,346	20,550	19,976
Income before income taxes	1,782	1,456	3,938	2,518
Income tax expense (benefit)	176	76	385	51
Net income	1,606	1,380	3,553	2,467
Capital expenditures	157	127	655	316
Total assets	1,023,404	1,026,571	1,023,404	1,026,571
Operating Segments [Member] | Bank [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0	0	0
Operating Segments [Member] | Bank [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	2,353	2,232	4,541	4,146
Operating Segments [Member] | Trust [Member]
Revenues [Abstract]
Interest and dividend income	32	22	62	43
Total operating income	1,268	1,199	2,541	2,463
Expenses [Abstract]
Interest expense	0	0	0	0
Provision for loan losses	0	0	0	0
Salaries and employee benefits	756	749	1,523	1,494
Other expenses	258	271	507	535
Total operating expenses	1,014	1,020	2,030	2,029
Income before income taxes	254	179	511	434
Income tax expense (benefit)	54	38	109	92
Net income	200	141	402	342
Capital expenditures	24	1	24	1
Total assets	6,498	6,110	6,498	6,110
Operating Segments [Member] | Trust [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	929	916	1,888	1,899
Operating Segments [Member] | Trust [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	307	261	591	521
Operating Segments [Member] | Unconsolidated Parent [Member]
Revenues [Abstract]
Interest and dividend income	1,805	1,524	3,955	2,812
Total operating income	1,855	1,604	4,055	2,942
Expenses [Abstract]
Interest expense	31	33	62	33
Provision for loan losses	0	0	0	0
Salaries and employee benefits	116	109	230	216
Other expenses	130	519	190	833
Total operating expenses	277	661	482	1,082
Income before income taxes	1,578	943	3,573	1,860
Income tax expense (benefit)	(47)	(49)	(80)	(74)
Net income	1,625	992	3,653	1,934
Capital expenditures	0	0	0	0
Total assets	109,698	102,239	109,698	102,239
Operating Segments [Member] | Unconsolidated Parent [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0	0	0
Operating Segments [Member] | Unconsolidated Parent [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	50	80	100	130
Eliminations [Member]
Revenues [Abstract]
Interest and dividend income	(1,805)	(1,522)	(3,955)	(2,810)
Total operating income	(1,871)	(1,587)	(4,086)	(2,940)
Expenses [Abstract]
Interest expense	0	0	0	0
Provision for loan losses	0	0	0	0
Salaries and employee benefits	0	0	0	0
Other expenses	(66)	(66)	(131)	(131)
Total operating expenses	(66)	(66)	(131)	(131)
Income before income taxes	(1,805)	(1,521)	(3,955)	(2,809)
Income tax expense (benefit)	0	0	0	0
Net income	(1,805)	(1,521)	(3,955)	(2,809)
Capital expenditures	0	0	0	0
Total assets	(110,196)	(102,790)	(110,196)	(102,790)
Eliminations [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0	0	0
Eliminations [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	$ (66)	$ (65)	$ (131)	$ (130)