Computation of Diluted Earnings (Loss) Per Share with Exclusion of Antidilutive Securities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Numerator:
Net earnings	$ 582		$ 487		$ 631		$ 645
Denominator:
Weighted average shares outstanding	4,936	[1]	4,712	[1]	4,896	[1]	4,679	[1]
Dilutive effect of stock options and non-vested restricted shares	4		92		25		81
Denominator for diluted net earnings per share	4,940		4,804		4,921		4,760

[1] Does not include unvested restricted shares.