Income (Loss) Per Share - Reconciliation of Basic and Diluted Income (Loss) Per Share (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic IPS:
Net income	$ 510,000	$ 1,953,000	$ 1,748,000	$ 3,232,000
Average common shares outstanding	6,359,556	7,265,597	6,493,449	7,348,708
Net income per share	$ 0.08	$ 0.27	$ 0.27	$ 0.44
Diluted IPS:
Net income	$ 510,000	$ 1,953,000	$ 1,748,000	$ 3,232,000
Average common shares outstanding	6,359,556	7,265,597	6,493,449	7,348,708
Dilutive effect of stock options	0	0	0	0
Average diluted shares outstanding	6,359,556	7,265,597	6,493,449	7,348,708
Net income per share, diluted	$ 0.08	$ 0.27	$ 0.27	$ 0.44