Computation of Diluted Earning Per Share with Exclusion of Antidilutive Securities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Numerator:
Net earnings (loss)	$ 504	$ 980	$ (841)	$ (59)
Denominator:
Weighted average shares outstanding	4,605	4,547	4,582	4,521
Dilutive effect of stock options and non-vested restricted shares	66	89
Denominator for diluted net earnings (loss) per share	4,671	4,636	4,582	4,521