Earnings per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net (loss) income from continuing operations	$ (858)	$ 184
Net loss from discontinued operations	0	(214)
Net loss	$ (858)	$ (30)
Denominator:
Common shares outstanding	17,056	16,340
Net Income (Loss) per common share - basic
Net (loss) income from continuing operations	$ (0.05)	$ 0.01
Net loss from discontinued operations	0.00	(0.01)
Net loss	$ (0.05)	$ 0.00
Denominator:
Common shares outstanding	17,056	16,340
Total shares	17,056	16,340
Income Loss per common share - diluted
Net (loss) income from continuing operations	$ (0.05)	$ 0.01
Net loss from discontinued operations	0.00	(0.01)
Net loss	$ (0.05)	$ 0.00