Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basic
Net income	$ 805	$ 716	$ 1,499	$ 1,200
Dividends on non-vested restricted stock	(14)	(13)	(28)	(28)
Net income allocated to stockholders	$ 791	$ 703	$ 1,471	$ 1,172
Weighted average common shares outstanding	4,854,020	4,851,805	4,854,684	4,832,847
Basic earnings per common share	$ 0.16	$ 0.14	$ 0.30	$ 0.24
Diluted
Net income allocated to stockholders	$ 791	$ 703	$ 1,471	$ 1,172
Weighted average common shares outstanding for basic earnings per common share	4,854,020	4,851,805	4,854,684	4,832,847
Add: Dilutive effects of assumed exercise of stock options and restricted stock	84,522	80,215	84,522	80,215
Average shares and dilutive potential common shares	4,938,542	4,932,020	4,939,206	4,913,062
Diluted earnings per common share	$ 0.16	$ 0.14	$ 0.30	$ 0.24