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Weighted Average Fair Value (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Weighted Average Fair Value [Line Items]
Options granted	$ 2.59
Options vested	$ 2.27

X

- Definition

Share based compensation arrangement by share based payment award options vested and expected to vest weighted average fair value.

+ References

No definition available.

+ Details

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

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

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