Loans - Summary of Balances of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Summary of balances of loans
Total loans	$ 332,273	$ 298,054
Net unamortized deferred loans costs	332	393
Allowance for loan losses	(3,374)	(3,205)	[1]
Loans, net	329,231	295,242	[1]
Construction, Land and Land Development
Summary of balances of loans
Total loans	44,571	43,048
Farmland
Summary of balances of loans
Total loans	1,054	1,128
Commercial Mortgages (Non-Owner Occupied)
Summary of balances of loans
Total loans	23,799	20,534
Commercial Mortgages (Owner Occupied)
Summary of balances of loans
Total loans	41,723	33,326
Residential First Mortgages
Summary of balances of loans
Total loans	156,004	135,267
Residential Revolving and Junior Mortgages
Summary of balances of loans
Total loans	26,579	25,400
Commercial and Industrial
Summary of balances of loans
Total loans	33,636	34,002
Allowance for loan losses	(433)	(323)
Consumer and Other Loans
Summary of balances of loans
Total loans	4,907	5,349
Allowance for loan losses	$ (127)	$ (104)

[1] Derived from the audited consolidated financial statements.