Income Taxes - Schedule of Income Tax Provisions from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before provision for income taxes	$ 786	$ (2,242)	$ 3,056	$ (1,908)
Provision for income taxes	$ (10)	$ (66)	$ (27)	$ (619)
Effective tax rate	1.30%	(2.90%)	0.90%	(32.40%)