Segment Reporting (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) Segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of principal business segments | Segment	3
Revenues [Abstract]
Interest and dividend income	$ 9,986	$ 9,876
Total operating income	13,264	13,292
Expenses [Abstract]
Interest expense	1,568	1,517
Provision for loan losses	300	226	$ 318
Salaries and employee benefits	5,994	5,699
Other expenses	4,036	3,592
Total operating expenses	11,898	11,034
Income before income taxes	1,366	2,258
Income tax expense (benefit)	116	231
Net income	1,250	2,027
Capital expenditures	368	498
Total assets	1,065,277	1,026,880	$ 1,054,488
Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	1,017	959
Other Income [Member]
Revenues [Abstract]
Noninterest revenue	2,261	2,457
Operating Segments [Member] | Bank [Member]
Revenues [Abstract]
Interest and dividend income	9,963	9,847
Total operating income	11,953	12,035
Expenses [Abstract]
Interest expense	1,548	1,486
Provision for loan losses	300	226
Salaries and employee benefits	4,988	4,818
Other expenses	3,682	3,348
Total operating expenses	10,518	9,878
Income before income taxes	1,435	2,157
Income tax expense (benefit)	129	209
Net income	1,306	1,948
Capital expenditures	368	498
Total assets	1,058,955	1,021,007
Operating Segments [Member] | Bank [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0
Operating Segments [Member] | Bank [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	1,990	2,188
Operating Segments [Member] | Trust [Member]
Revenues [Abstract]
Interest and dividend income	23	29
Total operating income	1,326	1,272
Expenses [Abstract]
Interest expense	0	0
Provision for loan losses	0	0
Salaries and employee benefits	814	767
Other expenses	342	249
Total operating expenses	1,156	1,016
Income before income taxes	170	256
Income tax expense (benefit)	37	55
Net income	133	201
Capital expenditures	0	0
Total assets	6,774	6,310
Operating Segments [Member] | Trust [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	1,017	959
Operating Segments [Member] | Trust [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	286	284
Operating Segments [Member] | Parent [Member]
Revenues [Abstract]
Interest and dividend income	1,439	725
Total operating income	1,489	775
Expenses [Abstract]
Interest expense	20	31
Provision for loan losses	0	0
Salaries and employee benefits	192	114
Other expenses	77	60
Total operating expenses	289	205
Income before income taxes	1,200	570
Income tax expense (benefit)	(50)	(33)
Net income	1,250	603
Capital expenditures	0	0
Total assets	111,861	107,427
Operating Segments [Member] | Parent [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0
Operating Segments [Member] | Parent [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	50	50
Eliminations [Member]
Revenues [Abstract]
Interest and dividend income	(1,439)	(725)
Total operating income	(1,504)	(790)
Expenses [Abstract]
Interest expense	0	0
Provision for loan losses	0	0
Salaries and employee benefits	0	0
Other expenses	(65)	(65)
Total operating expenses	(65)	(65)
Income before income taxes	(1,439)	(725)
Income tax expense (benefit)	0	0
Net income	(1,439)	(725)
Capital expenditures	0	0
Total assets	(112,313)	(107,864)
Eliminations [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0
Eliminations [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	$ (65)	$ (65)