Stockholders' Equity - Restricted Stock Vested by or Granted to Non-Executive Directors (Detail) (Restricted Stock [Member], Non-executive directors [Member])	28 Months Ended
Sep. 30, 2014
Restricted Stock [Member] \| Non-executive directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Granted	47,855

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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