Loans and Allowance for Loan Losses, Activity in Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Activity in allowance for loan losses [Roll Forward]
Balance, beginning of period	$ 10,864	$ 8,513	$ 9,639	$ 7,846
Charge-offs	(11)	(39)	(61)	(39)
Recoveries	153	4	153	21
Net recoveries (charge-offs)	142	(35)	92	(18)
Provision (credit) for loan losses	1,300	1,400	2,575	2,050
Balance, end of period	12,306	9,878	12,306	9,878
Allowance Balance [Abstract]
Ending balance, individually evaluated for impairment	3,165		3,165		$ 177
Ending balance, collectively evaluated for impairment	9,141		9,141		9,462
Total	12,306	9,878	12,306	9,878	9,639
Gross Loans [Abstract]
Ending balance, individually evaluated for impairment	29,076		29,076		23,123
Ending balance, collectively evaluated for impairment	907,027		907,027		815,965
Total Loans	936,103		936,103		839,088
Construction & Development [Member]
Activity in allowance for loan losses [Roll Forward]
Balance, beginning of period	1,367	944	1,239	782
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Net recoveries (charge-offs)	0	0	0	0
Provision (credit) for loan losses	264	142	392	304
Balance, end of period	1,631	1,086	1,631	1,086
Allowance Balance [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	1,631		1,631		1,239
Total	1,631	1,086	1,631	1,086	1,239
Gross Loans [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	124,106		124,106		107,855
Total Loans	124,106		124,106		107,855
1 - 4 Family Real Estate [Member]
Activity in allowance for loan losses [Roll Forward]
Balance, beginning of period	433	376	334	378
Charge-offs	0	0	0	0
Recoveries	0	0	0	2
Net recoveries (charge-offs)	0	0	0	2
Provision (credit) for loan losses	15	(27)	114	(31)
Balance, end of period	448	349	448	349
Allowance Balance [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	448		448		334
Total	448	349	448	349	334
Gross Loans [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	34,089		34,089		29,079
Total Loans	34,089		34,089		29,079
Commercial Real Estate - Other [Member]
Activity in allowance for loan losses [Roll Forward]
Balance, beginning of period	3,877	3,032	3,337	3,025
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Net recoveries (charge-offs)	0	0	0	0
Provision (credit) for loan losses	232	326	772	333
Balance, end of period	4,109	3,358	4,109	3,358
Allowance Balance [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	4,109		4,109		3,337
Total	4,109	3,358	4,109	3,358	3,337
Gross Loans [Abstract]
Ending balance, individually evaluated for impairment	14,816		14,816		8,054
Ending balance, collectively evaluated for impairment	297,716		297,716		282,435
Total Loans	312,532		312,532		290,489
Commercial & Industrial [Member]
Activity in allowance for loan losses [Roll Forward]
Balance, beginning of period	4,543	3,495	4,035	2,887
Charge-offs	0	(39)	0	(39)
Recoveries	14	4	14	9
Net recoveries (charge-offs)	14	(35)	14	(30)
Provision (credit) for loan losses	632	920	1,140	1,523
Balance, end of period	5,189	4,380	5,189	4,380
Allowance Balance [Abstract]
Ending balance, individually evaluated for impairment	3,165		3,165		177
Ending balance, collectively evaluated for impairment	2,024		2,024		3,858
Total	5,189	4,380	5,189	4,380	4,035
Gross Loans [Abstract]
Ending balance, individually evaluated for impairment	14,260		14,260		14,601
Ending balance, collectively evaluated for impairment	380,506		380,506		336,647
Total Loans	394,766		394,766		351,248
Agricultural [Member]
Activity in allowance for loan losses [Roll Forward]
Balance, beginning of period	532	551	580	642
Charge-offs	0	0	0	0
Recoveries	138	0	138	10
Net recoveries (charge-offs)	138	0	138	10
Provision (credit) for loan losses	155	28	107	(73)
Balance, end of period	825	579	825	579
Allowance Balance [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	825		825		580
Total	825	579	825	579	580
Gross Loans [Abstract]
Ending balance, individually evaluated for impairment	0		0		468
Ending balance, collectively evaluated for impairment	62,722		62,722		50,051
Total Loans	62,722		62,722		50,519
Consumer [Member]
Activity in allowance for loan losses [Roll Forward]
Balance, beginning of period	112	115	114	132
Charge-offs	(11)	0	(61)	0
Recoveries	1	0	1	0
Net recoveries (charge-offs)	(10)	0	(60)	0
Provision (credit) for loan losses	2	11	50	(6)
Balance, end of period	104	126	104	126
Allowance Balance [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	104		104		114
Total	104	$ 126	104	$ 126	114
Gross Loans [Abstract]
Ending balance, individually evaluated for impairment	0		0		0
Ending balance, collectively evaluated for impairment	7,888		7,888		9,898
Total Loans	$ 7,888		$ 7,888		$ 9,898