Plan of Liquidation - Additional Information (Detail)	9 Months Ended
Sep. 30, 2015
Business Acquisition [Line Items]
Liquidation date on which disposition of assets completes	Sep. 30, 2015
Liquidation Value [Member]
Business Acquisition [Line Items]
Liquidation date on which disposition of assets completes	Aug. 05, 2016

Date the liquidation is expected to be completed, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=35686370&loc=SL35686388-199418

Name:	us-gaap_LiquidationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration