Segment Information - (Loss) from Discontinued Operations (Detail) (USD $)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Segment Reporting [Abstract]
Litigation charge, net of recoveries (see Note 11)
Other income (expense), net	(613,000)	(251,000)
(Loss) from discontinued operations before income tax	(613,000)	(251,000)
Income tax (benefit) from discontinued operations	(235,000)	(99,000)
(Loss) from discontinued operations, net of income tax (benefit)	$ (377,878)	$ (151,632)

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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