Schedule of Net Revenues and Operating Results (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	$ (100,000)	$ 5,300,000	$ 100,000	$ 10,300,000
(Loss) before income taxes	(200,000)	(2,100,000)	(2,000,000)	(4,800,000)
Income tax benefit	100,000	800,000	800,000	1,900,000
Discontinued operations, net of tax	$ (128,000)	$ (1,278,000)	$ (1,177,000)	$ (2,912,000)