Description of Business - Additional Information (Detail)	3 Months Ended
Mar. 31, 2015
Accounting Policies [Abstract]
Liquidation date	Jul. 29, 2014

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