Segment Information - Income from Discontinued Operations (Detail) - USD ($)	3 Months Ended	9 Months Ended	39 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting [Abstract]
Litigation recoveries		$ 414,000		$ 2,764,000	$ 5,658,000
Other (expense), net		(188,000)		(763,000)
Income from discontinued operations before income tax	$ 0	226,000	$ 0	2,001,000
Income tax expense from discontinued operations	0	89,000	0	797,000
Income from discontinued operations, net of income tax expense	$ 0	$ 136,753	$ 0	$ 1,203,833

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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