Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Basic
Net income	$ 907	$ 805	$ 1,751	$ 1,499
Dividends on non-vested restricted stock	(14)	(14)	(28)	(28)
Net income allocated to stockholders	$ 893	$ 791	$ 1,723	$ 1,471
Weighted average common shares outstanding	4,901,947	4,854,020	4,887,546	4,854,684
Basic earnings per common share	$ 0.18	$ 0.16	$ 0.35	$ 0.3
Diluted
Net income allocated to stockholders	$ 893	$ 791	$ 1,723	$ 1,471
Weighted average common shares outstanding for basic earnings per common share	4,901,947	4,854,020	4,887,546	4,854,684
Add: Dilutive effects of assumed exercise of stock options and restricted stock	95,054	84,522	95,054	84,522
Average shares and dilutive potential common shares	4,997,001	4,938,542	4,982,600	4,939,206
Diluted earnings per common share	$ 0.18	$ 0.16	$ 0.35	$ 0.3