Reverse Stock Split - Additional Information (Detail)	12 Months Ended	1 Months Ended
Jan. 31, 2014	Apr. 24, 2015
Reverse Stock Split [Line Items]
Stockholders' Equity, Reverse Stock Split	one-for-ten reverse stock split
Subsequent Event [Member]
Reverse Stock Split [Line Items]
Stockholders' Equity, Reverse Stock Split		one-for-ten reverse stock split

Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 4

-Subparagraph (SAB TOPIC 4.C)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section C

Name:	us-gaap_StockholdersEquityReverseStockSplit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration