Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Segment	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of principal business segments | Segment			3
Revenues [Abstract]
Interest and dividend income	$ 9,737	$ 10,208	$ 29,571	$ 30,217
Total operating income	13,394	13,945	40,464	40,943
Expenses [Abstract]
Interest expense	1,269	1,656	4,212	4,775
Provision for/Recovery of loan losses	300	0	900	1,013	$ 318
Salaries and employee benefits	6,660	5,991	18,118	17,617
Other expenses	4,004	3,705	11,780	10,878
Total operating expenses	12,233	11,352	35,010	34,283
Income before income taxes	1,161	2,593	5,454	6,660
Income tax expense (benefit)	61	361	610	775
Net income	1,100	2,232	4,844	5,885
Capital expenditures	96	616	758	1,295
Total assets	1,256,093	1,050,595	1,256,093	1,050,595	$ 1,054,488
Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	955	949	2,881	2,837
Other Income [Member]
Revenues [Abstract]
Noninterest revenue	2,702	2,788	8,012	7,889
Operating Segments [Member] | Bank [Member]
Revenues [Abstract]
Interest and dividend income	9,732	10,177	29,532	30,124
Total operating income	12,215	12,750	36,821	37,238
Expenses [Abstract]
Interest expense	1,258	1,629	4,167	4,686
Provision for/Recovery of loan losses	300	0	900	1,013
Salaries and employee benefits	5,746	5,099	15,305	14,972
Other expenses	3,752	3,432	10,886	10,039
Total operating expenses	11,056	10,160	31,258	30,710
Income before income taxes	1,159	2,590	5,563	6,528
Income tax expense (benefit)	61	359	631	744
Net income	1,098	2,231	4,932	5,784
Capital expenditures	86	614	742	1,269
Total assets	1,249,144	1,044,249	1,249,144	1,044,249
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	2,483	2,573	7,289	7,114
Operating Segments [Member] | Trust [Member]
Revenues [Abstract]
Interest and dividend income	6	32	40	94
Total operating income	1,195	1,210	3,690	3,751
Expenses [Abstract]
Interest expense	0	0	0	0
Provision for/Recovery of loan losses	0	0	0	0
Salaries and employee benefits	760	777	2,315	2,300
Other expenses	249	253	827	760
Total operating expenses	1,009	1,030	3,142	3,060
Income before income taxes	186	180	548	691
Income tax expense (benefit)	39	39	117	148
Net income	147	141	431	543
Capital expenditures	10	2	16	26
Total assets	6,961	6,531	6,961	6,531
Operating Segments [Member] | Trust [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	955	949	2,881	2,837
Operating Segments [Member] | Trust [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	234	229	769	820
Operating Segments [Member] | Parent [Member]
Revenues [Abstract]
Interest and dividend income	1,244	2,371	5,362	6,326
Total operating income	1,294	2,422	5,512	6,477
Expenses [Abstract]
Interest expense	11	27	45	89
Provision for/Recovery of loan losses	0	0	0	0
Salaries and employee benefits	154	115	498	345
Other expenses	68	85	263	275
Total operating expenses	233	227	806	709
Income before income taxes	1,061	2,195	4,706	5,768
Income tax expense (benefit)	(39)	(37)	(138)	(117)
Net income	1,100	2,232	4,844	5,885
Capital expenditures	0	0	0	0
Total assets	118,423	111,188	118,423	111,188
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	51	150	151
Eliminations [Member]
Revenues [Abstract]
Interest and dividend income	(1,245)	(2,372)	(5,363)	(6,327)
Total operating income	(1,310)	(2,437)	(5,559)	(6,523)
Expenses [Abstract]
Interest expense	0	0	0	0
Provision for/Recovery of loan losses	0	0	0	0
Salaries and employee benefits	0	0	0	0
Other expenses	(65)	(65)	(196)	(196)
Total operating expenses	(65)	(65)	(196)	(196)
Income before income taxes	(1,245)	(2,372)	(5,363)	(6,327)
Income tax expense (benefit)	0	0	0	0
Net income	(1,245)	(2,372)	(5,363)	(6,327)
Capital expenditures	0	0	0	0
Total assets	(118,435)	(111,373)	(118,435)	(111,373)
Eliminations [Member] | Income from Fiduciary Activities [Member]
Revenues [Abstract]
Noninterest revenue	0	0	0	0
Eliminations [Member] | Other Income [Member]
Revenues [Abstract]
Noninterest revenue	$ (65)	$ (65)	$ (196)	$ (196)