Plan of Liquidation - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
Business Acquisition [Line Items]
Liquidation date on which disposition of assets completes	Aug. 05, 2016
Description of liquidation plan	The Liquidating Trust will terminate upon the earlier of (i) the distribution of all of the remaining assets of the Liquidating Trust in accordance with the terms of the Liquidating Trust Agreement, or (ii) August 5, 2019. The Liquidating Trust may be extended beyond August 5, 2019 if the Trustees of the Liquidating Trust determine that an extension is reasonably necessary to fulfill the purpose of the Liquidating Trust. Although no assurances can be given, it is anticipated that the Liquidating Trust will be extended and the liquidation will be completed by December 31, 2019.
Liquidating Trust [Member]
Business Acquisition [Line Items]
Liquidation date on which disposition of assets completes	Dec. 31, 2018