Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net income from continuing operations	$ 751	$ 688	$ 2,890	$ 577
Net loss from discontinued operations	0	(416)	(109)	(1,514)
Net income (loss)	$ 751	$ 272	$ 2,781	$ (937)
Denominator:
Common shares outstanding	17,841	17,493	17,766	17,368
Earnings per common share - basic
Net income from continuing operations	$ 0.04	$ 0.04	$ 0.16	$ 0.03
Net loss from discontinued operations	$ 0.00	$ (0.02)	$ (0.01)	$ (0.09)
Net income (loss)	$ 0.04	$ 0.02	$ 0.16	$ (0.05)
Denominator:
Common shares outstanding	17,841	17,493	17,766	17,368
Restricted shares subject to vesting	333	214	227
Performance shares subject to vesting	65	71	65
Common stock option grants	115	1	35
Total shares	18,354	17,779	18,093	17,368
Earnings per common share - diluted
Net income from continuing operations	$ 0.04	$ 0.04	$ 0.16	$ 0.03
Net loss from discontinued operations	$ 0.00	$ (0.02)	$ (0.01)	$ (0.09)
Net income (loss)	$ 0.04	$ 0.02	$ 0.15	$ (0.05)