Net (Loss) Income Per Common Share - Calculation of Diluted Net (Loss) Income Per Share (Parenthetical) (Detail) - Jun. 30, 2015 - shares	Total	Total
Earnings Per Share [Abstract]
Dilutive effects from equity instruments	0	0

Additional shared included in the calculation of diluted EPS as a result of the potentially dilutive effect of equity forward arrangements using the reverse treasury stock method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 35

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2366-109256

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Name:	us-gaap_IncrementalCommonSharesAttributableToEquityForwardAgreements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration