Computation of Diluted Earning Per Share with Exclusion of Antidilutive Securities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Numerator:
Net earnings (loss)	$ 487		$ 307		$ 645		$ (534)
Denominator:
Weighted average shares outstanding	4,712	[1]	4,607	[1]	4,679	[1]	4,590	[1]
Dilutive effect of stock options and non-vested restricted shares	92		57		81
Denominator for diluted net earnings (loss) per share	4,804		4,664		4,760		4,590

[1] Does not include unvested restricted shares.