Discontinued Operations - Revenues and the components of income related to discontinued operations (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations	$ 0	$ (888,000)	$ 0	$ (1,477,000)
Ruckus Sports LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue from discontinued operations		400,000		1,000,000
Loss from discontinued operations		$ (900,000)		$ (1,500,000)