4. Allowance for Loan Losses (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Beginning Balance	$ 6,044	$ 7,543
Charge-offs	2,216	2,872
Recoveries	965	1,373
Provision	2,480	0
Ending Balance	7,273	6,044
Individually Evaluated for Impairment	3,745	1,882
Collectively Evaluated for Impairment	3,528	4,162
Construction/Land Development [Member]
Beginning Balance	2,547	3,381
Charge-offs	47	620
Recoveries	122	0
Provision	86	(214)
Ending Balance	2,708	2,547
Individually Evaluated for Impairment	2,182	1,661
Collectively Evaluated for Impairment	526	886
Farmland [Member]
Beginning Balance	25	34
Charge-offs	0	0
Recoveries	0	0
Provision	(3)	(9)
Ending Balance	22	25
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	22	25
Real Estate [Member]
Beginning Balance	719	843
Charge-offs	57	0
Recoveries	12	2
Provision	(291)	(126)
Ending Balance	383	719
Individually Evaluated for Impairment	7	209
Collectively Evaluated for Impairment	376	510
Multi-Family [Member]
Beginning Balance	19	23
Charge-offs	0	0
Recoveries	0	0
Provision	(4)	(6)
Ending Balance	15	19
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	15	19
Commercial Real Estate [Member]
Beginning Balance	482	705
Charge-offs	46	0
Recoveries	1	13
Provision	1,328	(236)
Ending Balance	1,765	482
Individually Evaluated for Impairment	1,539	0
Collectively Evaluated for Impairment	226	482
Home Equity - Closed End [Member]
Beginning Balance	66	75
Charge-offs	3	7
Recoveries	4	25
Provision	(20)	(27)
Ending Balance	47	66
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	47	66
Home Equity [Member]
Beginning Balance	209	470
Charge-offs	0	26
Recoveries	3	53
Provision	(53)	(288)
Ending Balance	159	209
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	159	209
Commercial & Industrial - Non-Real Estate [Member]
Beginning Balance	337	586
Charge-offs	544	179
Recoveries	88	72
Provision	365	(142)
Ending Balance	246	337
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	246	337
Consumer [Member]
Beginning Balance	148	78
Charge-offs	28	136
Recoveries	28	28
Provision	(68)	178
Ending Balance	80	148
Individually Evaluated for Impairment	2	0
Collectively Evaluated for Impairment	78	148
Dealer Finance [Member]
Beginning Balance	1,440	1,289
Charge-offs	1,448	1,806
Recoveries	673	1,143
Provision	1,148	814
Ending Balance	1,813	1,440
Individually Evaluated for Impairment	15	12
Collectively Evaluated for Impairment	1,798	1,428
Credit Cards [Member]
Beginning Balance	52	59
Charge-offs	43	98
Recoveries	34	37
Provision	(8)	54
Ending Balance	35	52
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	$ 35	$ 52