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Allowance for Loan Losses - Allowance by Impairment Methodology and Loans by Impairment Methodology (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Allowance for loan losses:
Beginning balance	$ 5,326	$ 5,321
Charge-offs	(1,169)	(733)
Recoveries	252	638
Provision for (recovery of) loan losses	600	100
Ending balance	5,009	5,326
Ending Balance:
Individually evaluated for impairment	243	0
Collectively evaluated for impairment	4,766	5,326
Loans:
Total Loans	542,856	522,201
Individually evaluated for impairment	3,436	3,811
Collectively evaluated for impairment	539,420	518,390
Real estate loans | Construction and land development
Allowance for loan losses:
Beginning balance	414	441
Charge-offs	0	0
Recoveries	0	11
Provision for (recovery of) loan losses	147	(38)
Ending balance	561	414
Ending Balance:
Individually evaluated for impairment	71	0
Collectively evaluated for impairment	490	414
Loans:
Total Loans	45,867	35,927
Individually evaluated for impairment	327	1,150
Collectively evaluated for impairment	45,540	34,777
Real estate loans | Secured by 1-4 family residential
Allowance for loan losses:
Beginning balance	775	1,019
Charge-offs	(55)	(126)
Recoveries	13	302
Provision for (recovery of) loan losses	162	(420)
Ending balance	895	775
Ending Balance:
Individually evaluated for impairment	172	0
Collectively evaluated for impairment	723	775
Loans:
Total Loans	215,945	208,177
Individually evaluated for impairment	663	1,307
Collectively evaluated for impairment	215,282	206,870
Real estate loans | Other real estate
Allowance for loan losses:
Beginning balance	2,948	3,142
Charge-offs	0	0
Recoveries	5	50
Provision for (recovery of) loan losses	(793)	(244)
Ending balance	2,160	2,948
Ending Balance:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,160	2,948
Loans:
Total Loans	219,553	222,256
Individually evaluated for impairment	2,249	1,289
Collectively evaluated for impairment	217,304	220,967
Commercial and industrial loans
Allowance for loan losses:
Beginning balance	418	380
Charge-offs	(10)	0
Recoveries	8	10
Provision for (recovery of) loan losses	48	28
Ending balance	464	418
Ending Balance:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	464	418
Loans:
Total Loans	44,605	38,763
Individually evaluated for impairment	197	65
Collectively evaluated for impairment	44,408	38,698
Consumer and other loans
Allowance for loan losses:
Beginning balance	771	339
Charge-offs	(1,104)	(607)
Recoveries	226	265
Provision for (recovery of) loan losses	1,036	774
Ending balance	929	771
Ending Balance:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	929	771
Loans:
Total Loans	16,886	17,078
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	$ 16,886	$ 17,078

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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