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Employee Stock Purchase Plan - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014 Employee Stock Purchase Plan [Member]	Sep. 30, 2014 Employee Stock Purchase Plan [Member]	Sep. 30, 2014 Employee Stock Purchase Plan [Member]	Aug. 16, 2014 Employee Stock Purchase Plan [Member]
Subsidiary, Sale of Stock [Line Items]
Percentage of discount from market price of shares			85.00%
Maximum limit of payroll deductions			10.00%
Number of shares issue that the ESPP authorizes for purchase by eligible employees				1,500,132
Total fair value of awards recognized as expenses	$ 26,218	$ 26,218

X

- Definition

Commitment made to pay deferred cash remuneration expressed as a percentage of the individual's base salary.

+ References

No definition available.

+ Details

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X

- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ 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 (a)(3)

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

+ Details

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X

- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ 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 (c)

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

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X

- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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