Segment Reporting (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021 USD ($) Segment	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of principal business segments | Segment	3
Revenues [Abstract]
Interest and dividend income	$ 10,978	$ 9,986
Total operating income	15,112	13,264
Expenses [Abstract]
Interest expense	822	1,568
Provision for loan losses	150	300	$ 1,000
Salaries and employee benefits	6,227	5,994
Other expenses	4,331	4,036
Total operating expenses	11,530	11,898
Income before income taxes	3,582	1,366
Income tax expense (benefit)	570	116
Net income	3,012	1,250
Capital expenditures	126	368
Total assets	1,257,638	1,065,277	$ 1,226,191
Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	1,027	1,017
Other Income [Member]
Revenues [Abstract]
Noninterest revenue	3,107	2,261
Operating Segments [Member] | Bank [Member]
Revenues [Abstract]
Interest and dividend income	10,973	9,963
Total operating income	13,839	11,953
Expenses [Abstract]
Interest expense	818	1,548
Provision for loan losses	150	300
Salaries and employee benefits	5,320	4,988
Other expenses	4,063	3,682
Total operating expenses	10,351	10,518
Income before income taxes	3,488	1,435
Income tax expense (benefit)	550	129
Net income	2,938	1,306
Capital expenditures	121	368
Total assets	1,250,353	1,058,955
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	2,866	1,990
Operating Segments [Member] | Trust [Member]
Revenues [Abstract]
Interest and dividend income	5	23
Total operating income	1,288	1,326
Expenses [Abstract]
Interest expense	0	0
Provision for loan losses	0	0
Salaries and employee benefits	743	814
Other expenses	279	342
Total operating expenses	1,022	1,156
Income before income taxes	266	170
Income tax expense (benefit)	56	37
Net income	210	133
Capital expenditures	5	0
Total assets	7,003	6,774
Operating Segments [Member] | Trust [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	1,027	1,017
Operating Segments [Member] | Trust [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	256	286
Operating Segments [Member] | Parent [Member]
Revenues [Abstract]
Interest and dividend income	3,148	1,439
Total operating income	3,198	1,489
Expenses [Abstract]
Interest expense	4	20
Provision for loan losses	0	0
Salaries and employee benefits	164	192
Other expenses	54	77
Total operating expenses	222	289
Income before income taxes	2,976	1,200
Income tax expense (benefit)	(36)	(50)
Net income	3,012	1,250
Capital expenditures	0	0
Total assets	117,956	111,861
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	(3,148)	(1,439)
Total operating income	(3,213)	(1,504)
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	(3,148)	(1,439)
Income tax expense (benefit)	0	0
Net income	(3,148)	(1,439)
Capital expenditures	0	0
Total assets	(117,674)	(112,313)
Eliminations [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0
Eliminations [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	$ (65)	$ (65)