Income (Loss) per Common Share - Reconciliation of Weighted-Average Shares Used for the Basic Computation and that Used for the Diluted Computation (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Weighted-average common shares for basic	4,853,088	4,843,608	4,852,469	4,843,012
Dilutive effect of convertible preferred stock and stock options	75,555	73,788
Weighted-average common shares for diluted	4,928,643	4,917,396	4,852,469	4,843,012