Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of principal business segments | Segment			3
Revenues [Abstract]
Interest and dividend income	$ 10,815	$ 9,737	$ 31,652	$ 29,571
Total operating income	14,421	13,394	42,930	40,464
Expenses [Abstract]
Interest expense	939	1,269	2,514	4,212
Provision for loan losses	360	300	510	900	$ 1,000
Salaries and employee benefits	6,558	6,660	19,012	18,118
Other expenses	4,370	4,004	13,009	11,780
Total operating expenses	12,227	12,233	35,045	35,010
Income before income taxes	2,194	1,161	7,885	5,454
Income tax expense (benefit)	286	61	1,123	610
Net income	1,908	1,100	6,762	4,844
Capital expenditures	370	96	1,130	758
Total assets	1,311,626	1,256,093	1,311,626	1,256,093	$ 1,226,191
Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	1,032	955	3,110	2,881
Other Income [Member]
Revenues [Abstract]
Noninterest revenue	2,574	2,702	8,168	8,012
Operating Segments [Member] | Bank [Member]
Revenues [Abstract]
Interest and dividend income	10,809	9,732	31,635	29,532
Total operating income	13,150	12,215	39,061	36,821
Expenses [Abstract]
Interest expense	688	1,258	2,258	4,167
Provision for loan losses	360	300	510	900
Salaries and employee benefits	5,644	5,746	16,263	15,305
Other expenses	4,077	3,752	12,139	10,886
Total operating expenses	10,769	11,056	31,170	31,258
Income before income taxes	2,381	1,159	7,891	5,563
Income tax expense (benefit)	325	61	1,123	631
Net income	2,056	1,098	6,768	4,932
Capital expenditures	370	86	1,089	742
Total assets	1,304,291	1,249,144	1,304,291	1,249,144
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	2,341	2,483	7,426	7,289
Operating Segments [Member] | Trust [Member]
Revenues [Abstract]
Interest and dividend income	6	6	17	40
Total operating income	1,287	1,195	3,915	3,690
Expenses [Abstract]
Interest expense	0	0	0	0
Provision for loan losses	0	0	0	0
Salaries and employee benefits	746	760	2,253	2,315
Other expenses	257	249	788	827
Total operating expenses	1,003	1,009	3,041	3,142
Income before income taxes	284	186	874	548
Income tax expense (benefit)	59	39	184	117
Net income	225	147	690	431
Capital expenditures	0	10	41	16
Total assets	7,222	6,961	7,222	6,961
Operating Segments [Member] | Trust [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	1,032	955	3,110	2,881
Operating Segments [Member] | Trust [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	249	234	788	769
Operating Segments [Member] | Parent [Member]
Revenues [Abstract]
Interest and dividend income	2,281	1,244	7,458	5,362
Total operating income	2,331	1,294	7,608	5,512
Expenses [Abstract]
Interest expense	251	11	256	45
Provision for loan losses	0	0	0	0
Salaries and employee benefits	168	154	496	498
Other expenses	102	68	278	263
Total operating expenses	521	233	1,030	806
Income before income taxes	1,810	1,061	6,578	4,706
Income tax expense (benefit)	(98)	(39)	(184)	(138)
Net income	1,908	1,100	6,762	4,844
Capital expenditures	0	0	0	0
Total assets	150,442	118,423	150,442	118,423
Operating Segments [Member] | Parent [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0	0	0
Operating Segments [Member] | Parent [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	50	50	150	150
Eliminations [Member]
Revenues [Abstract]
Interest and dividend income	(2,281)	(1,245)	(7,458)	(5,363)
Total operating income	(2,347)	(1,310)	(7,654)	(5,559)
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)	(65)	(196)	(196)
Total operating expenses	(66)	(65)	(196)	(196)
Income before income taxes	(2,281)	(1,245)	(7,458)	(5,363)
Income tax expense (benefit)	0	0	0	0
Net income	(2,281)	(1,245)	(7,458)	(5,363)
Capital expenditures	0	0	0	0
Total assets	(150,329)	(118,435)	(150,329)	(118,435)
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)	$ (196)	$ (196)