3. Loans, Credit Risk (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Credit risk profile
Total Loans	$ 823,557	$ 804,023	$ 765,824
Excellent Quality
Credit risk profile
Total Loans	7,085	7,577
High Quality
Credit risk profile
Total Loans	205,780	204,792
Good Quality
Credit risk profile
Total Loans	504,385	489,142
Management Attention
Credit risk profile
Total Loans	87,081	81,903
Watch
Credit risk profile
Total Loans	12,808	13,824
Substandard
Credit risk profile
Total Loans	6,418	6,785
Doubtful
Credit risk profile
Total Loans	0	0
Loss
Credit risk profile
Total Loans	0	0
Construction and land development
Credit risk profile
Total Loans	95,219	94,178
Single-family residential
Credit risk profile
Total Loans	255,338	252,983
Single-family residential - Banco de la Gente stated income
Credit risk profile
Total Loans	33,717	34,261
Commercial
Credit risk profile
Total Loans	278,619	270,055
Multifamily and Farmland
Credit risk profile
Total Loans	39,106	33,163
Commercial loans (not secured by real estate)
Credit risk profile
Total Loans	101,572	97,465
Farm loans (not secured by real estate)
Credit risk profile
Total Loans	984	926
Consumer loans (not secured by real estate)
Credit risk profile
Total Loans	8,653	9,165
All other loans (not secured by real estate)
Credit risk profile
Total Loans	10,349	11,827
Construction and land development
Credit risk profile
Total Loans	95,219	94,178	82,046
Construction and land development | Excellent Quality
Credit risk profile
Total Loans	329	504
Construction and land development | High Quality
Credit risk profile
Total Loans	28,895	24,594
Construction and land development | Good Quality
Credit risk profile
Total Loans	56,203	59,549
Construction and land development | Management Attention
Credit risk profile
Total Loans	6,441	5,707
Construction and land development | Watch
Credit risk profile
Total Loans	3,199	3,669
Construction and land development | Substandard
Credit risk profile
Total Loans	152	155
Construction and land development | Doubtful
Credit risk profile
Total Loans	0	0
Construction and land development | Loss
Credit risk profile
Total Loans	0	0
Single-family residential
Credit risk profile
Total Loans	255,338	252,983	244,061
Single-family residential | Excellent Quality
Credit risk profile
Total Loans	5,561	5,795
Single-family residential | High Quality
Credit risk profile
Total Loans	127,160	128,588
Single-family residential | Good Quality
Credit risk profile
Total Loans	96,684	92,435
Single-family residential | Management Attention
Credit risk profile
Total Loans	19,531	19,200
Single-family residential | Watch
Credit risk profile
Total Loans	3,496	3,761
Single-family residential | Substandard
Credit risk profile
Total Loans	2,906	3,204
Single-family residential | Doubtful
Credit risk profile
Total Loans	0	0
Single-family residential | Loss
Credit risk profile
Total Loans	0	0
Single-family residential - Banco de la Gente stated income
Credit risk profile
Total Loans	33,717	34,261	36,540
Single-family residential - Banco de la Gente stated income | Excellent Quality
Credit risk profile
Total Loans	0	0
Single-family residential - Banco de la Gente stated income | High Quality
Credit risk profile
Total Loans	0	0
Single-family residential - Banco de la Gente stated income | Good Quality
Credit risk profile
Total Loans	13,373	13,776
Single-family residential - Banco de la Gente stated income | Management Attention
Credit risk profile
Total Loans	14,946	15,012
Single-family residential - Banco de la Gente stated income | Watch
Credit risk profile
Total Loans	2,236	2,408
Single-family residential - Banco de la Gente stated income | Substandard
Credit risk profile
Total Loans	3,162	3,065
Single-family residential - Banco de la Gente stated income | Doubtful
Credit risk profile
Total Loans	0	0
Single-family residential - Banco de la Gente stated income | Loss
Credit risk profile
Total Loans	0	0
Commercial
Credit risk profile
Total Loans	278,619	270,055	261,636
Commercial | Excellent Quality
Credit risk profile
Total Loans	0	0
Commercial | High Quality
Credit risk profile
Total Loans	24,617	25,321
Commercial | Good Quality
Credit risk profile
Total Loans	216,741	211,541
Commercial | Management Attention
Credit risk profile
Total Loans	34,198	30,333
Commercial | Watch
Credit risk profile
Total Loans	2,974	2,616
Commercial | Substandard
Credit risk profile
Total Loans	89	244
Commercial | Doubtful
Credit risk profile
Total Loans	0	0
Commercial | Loss
Credit risk profile
Total Loans	0	0
Multifamily and Farmland
Credit risk profile
Total Loans	39,106	33,163	29,108
Multifamily and Farmland | Excellent Quality
Credit risk profile
Total Loans	0	0
Multifamily and Farmland | High Quality
Credit risk profile
Total Loans	361	395
Multifamily and Farmland | Good Quality
Credit risk profile
Total Loans	34,361	27,774
Multifamily and Farmland | Management Attention
Credit risk profile
Total Loans	3,819	3,906
Multifamily and Farmland | Watch
Credit risk profile
Total Loans	565	1,088
Multifamily and Farmland | Substandard
Credit risk profile
Total Loans	0	0
Multifamily and Farmland | Doubtful
Credit risk profile
Total Loans	0	0
Multifamily and Farmland | Loss
Credit risk profile
Total Loans	0	0
Commercial loans (not secured by real estate)
Credit risk profile
Total Loans	101,572	97,465	89,304
Commercial loans (not secured by real estate) | Excellent Quality
Credit risk profile
Total Loans	545	605
Commercial loans (not secured by real estate) | High Quality
Credit risk profile
Total Loans	19,688	20,520
Commercial loans (not secured by real estate) | Good Quality
Credit risk profile
Total Loans	74,164	69,651
Commercial loans (not secured by real estate) | Management Attention
Credit risk profile
Total Loans	6,764	6,325
Commercial loans (not secured by real estate) | Watch
Credit risk profile
Total Loans	327	264
Commercial loans (not secured by real estate) | Substandard
Credit risk profile
Total Loans	84	100
Commercial loans (not secured by real estate) | Doubtful
Credit risk profile
Total Loans	0	0
Commercial loans (not secured by real estate) | Loss
Credit risk profile
Total Loans	0	0
Farm loans (not secured by real estate)
Credit risk profile
Total Loans	984	926	$ 1,095
Farm loans (not secured by real estate) | Excellent Quality
Credit risk profile
Total Loans	0	0
Farm loans (not secured by real estate) | High Quality
Credit risk profile
Total Loans	0	0
Farm loans (not secured by real estate) | Good Quality
Credit risk profile
Total Loans	852	785
Farm loans (not secured by real estate) | Management Attention
Credit risk profile
Total Loans	132	141
Farm loans (not secured by real estate) | Watch
Credit risk profile
Total Loans	0	0
Farm loans (not secured by real estate) | Substandard
Credit risk profile
Total Loans	0	0
Farm loans (not secured by real estate) | Doubtful
Credit risk profile
Total Loans	0	0
Farm loans (not secured by real estate) | Loss
Credit risk profile
Total Loans	0	0
Consumer loans (not secured by real estate)
Credit risk profile
Total Loans	8,653	9,165
Consumer loans (not secured by real estate) | Excellent Quality
Credit risk profile
Total Loans	650	673
Consumer loans (not secured by real estate) | High Quality
Credit risk profile
Total Loans	2,995	3,229
Consumer loans (not secured by real estate) | Good Quality
Credit risk profile
Total Loans	4,467	4,699
Consumer loans (not secured by real estate) | Management Attention
Credit risk profile
Total Loans	505	529
Consumer loans (not secured by real estate) | Watch
Credit risk profile
Total Loans	11	18
Consumer loans (not secured by real estate) | Substandard
Credit risk profile
Total Loans	25	17
Consumer loans (not secured by real estate) | Doubtful
Credit risk profile
Total Loans	0	0
Consumer loans (not secured by real estate) | Loss
Credit risk profile
Total Loans	0	0
All other loans (not secured by real estate)
Credit risk profile
Total Loans	10,349	11,827
All other loans (not secured by real estate) | Excellent Quality
Credit risk profile
Total Loans	0	0
All other loans (not secured by real estate) | High Quality
Credit risk profile
Total Loans	2,064	2,145
All other loans (not secured by real estate) | Good Quality
Credit risk profile
Total Loans	7,540	8,932
All other loans (not secured by real estate) | Management Attention
Credit risk profile
Total Loans	745	750
All other loans (not secured by real estate) | Watch
Credit risk profile
Total Loans	0	0
All other loans (not secured by real estate) | Substandard
Credit risk profile
Total Loans	0	0
All other loans (not secured by real estate) | Doubtful
Credit risk profile
Total Loans	0	0
All other loans (not secured by real estate) | Loss
Credit risk profile
Total Loans	$ 0	$ 0