Loans, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Allowance for loan losses [Roll Forward]
Balance, beginning of period	$ 5,679	$ 5,008	$ 5,728	$ 4,045
Provision (credit) charged to expenses	(15)	16	(67)	1,189
Losses charged off	(24)	(44)	(66)	(365)
Recoveries	12	36	57	147
Balance, end of period	5,652	5,016	5,652	5,016
Commercial and industrial [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	957	633	816	456
Provision (credit) charged to expenses	86	72	227	231
Losses charged off	0	(14)	0	(14)
Recoveries	0	0	0	18
Balance, end of period	1,043	691	1,043	691
Commercial Secured By Real Estate [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	3,634	3,574	3,903	2,924
Provision (credit) charged to expenses	109	(109)	(158)	811
Losses charged off	0	0	(2)	(270)
Recoveries	0	0	0	0
Balance, end of period	3,743	3,465	3,743	3,465
Residential Real Estate [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	919	629	837	528
Provision (credit) charged to expenses	(223)	68	(152)	99
Losses charged off	0	0	(16)	(3)
Recoveries	1	0	28	73
Balance, end of period	697	697	697	697
Consumer [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	131	129	153	99
Provision (credit) charged to expenses	(8)	(10)	(28)	31
Losses charged off	(2)	(3)	(5)	(15)
Recoveries	1	17	2	18
Balance, end of period	122	133	122	133
Agricultural [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	39	39	28	34
Provision (credit) charged to expenses	(2)	(13)	9	(8)
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	37	26	37	26
Other [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	(1)	4	(9)	4
Provision (credit) charged to expenses	23	8	35	25
Losses charged off	(22)	(27)	(43)	(63)
Recoveries	10	19	27	38
Balance, end of period	$ 10	$ 4	$ 10	$ 4