Loans and Allowance for Loan Losses, Loan Portfolio Based on Internal Rating Category (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	$ 632,958	$ 601,902
1 (Pass) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	579,966	544,956
2 (Watch) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	38,041	44,662
3 (Special Mention) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	5,082	3,207
4 (Substandard) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	9,869	9,077
Construction & Development [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	83,291	87,267
Construction & Development [Member] | 1 (Pass) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	81,053	84,485
Construction & Development [Member] | 2 (Watch) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	2,238	2,782
Construction & Development [Member] | 3 (Special Mention) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	0	0
Construction & Development [Member] | 4 (Substandard) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	0	0
1-4 Family Commercial [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	36,165	33,278
1-4 Family Commercial [Member] | 1 (Pass) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	35,463	29,942
1-4 Family Commercial [Member] | 2 (Watch) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	694	3,221
1-4 Family Commercial [Member] | 3 (Special Mention) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	0	0
1-4 Family Commercial [Member] | 4 (Substandard) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	8	115
Commercial Real Estate - Other [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	188,142	156,396
Commercial Real Estate - Other [Member] | 1 (Pass) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	182,645	154,353
Commercial Real Estate - Other [Member] | 2 (Watch) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	1,510	1,559
Commercial Real Estate - Other [Member] | 3 (Special Mention) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	2,076	0
Commercial Real Estate - Other [Member] | 4 (Substandard) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	1,911	484
Commercial & Industrial [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	256,100	248,394
Commercial & Industrial [Member] | 1 (Pass) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	216,425	204,671
Commercial & Industrial [Member] | 2 (Watch) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	33,489	36,342
Commercial & Industrial [Member] | 3 (Special Mention) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	877	0
Commercial & Industrial [Member] | 4 (Substandard) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	5,309	7,381
Agricultural [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	56,167	62,844
Agricultural [Member] | 1 (Pass) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	51,287	57,782
Agricultural [Member] | 2 (Watch) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	110	758
Agricultural [Member] | 3 (Special Mention) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	2,129	3,207
Agricultural [Member] | 4 (Substandard) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	2,641	1,097
Consumer [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	13,093	13,723
Consumer [Member] | 1 (Pass) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	13,093	13,723
Consumer [Member] | 2 (Watch) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	0	0
Consumer [Member] | 3 (Special Mention) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	0	0
Consumer [Member] | 4 (Substandard) [Member]
Loans Portfolio based on Internal Rating [Abstract]
Gross loans	$ 0	$ 0