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INCOME TAXES - Schedule of Difference in Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Apr. 30, 2014
Valuation Allowance [Line Items]
Federal statutory rate	35.00%	35.00%	35.00%	35.00%
Tax at statutory rate	$ (1,787)	$ (2,228)	$ (3,650)	$ (8,929)
State income taxes, net of federal benefit	(59)	(265)	198	(1,271)
Non-deductible expenses	505	100	467	505
Tax credits	(380)	(1,085)	(671)	(598)
Non-deductible equity income in subsidiaries and GreenFiber goodwill impairment	(73)	0	(415)	1,548
Tax over book basis in GreenFiber on sale	0	0	0	(2,570)
Other, net	(35)	(398)	150	(491)
Income before provision (benefit) for income tax, net	703	494	1,351	1,799
Other Valuation Allowance
Valuation Allowance [Line Items]
Other increase in valuation allowance	$ 2,532	$ 4,370	$ 5,272	$ 13,605

X

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the disposition of a business not qualifying as a discontinued operation.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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