Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Gross number of share options (or share units) granted during the period.

+ 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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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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Subsequent Events - Additional Information (Detail) - $ / shares	1 Months Ended		12 Months Ended
	Jan. 31, 2016	Oct. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Subsequent Event [Line Items]
Number of Outstanding Options, Granted			1,715,028
Weighted Average Price, Granted			$ 11.29
Weighted average grant date fair value of options granted			$ 11.29	$ 10.18	$ 3.42
Performance Options with Market Condition [Member]
Subsequent Event [Line Items]
Number of Outstanding Options, Granted		169,402
Options vesting period		4 years
Weighted average grant date fair value of options granted		$ 4.23
Requisite service period		5 years
Subsequent Event [Member] \| Common Stock [Member] \| Executives, Employees And Consultants [Member] \| Performance Options with Market Condition [Member]
Subsequent Event [Line Items]
Number of Outstanding Options, Granted	386,210
Weighted Average Price, Granted	$ 9.13
Options vesting period	4 years
Weighted average grant date fair value of options granted	$ 1.93
Requisite service period	5 years
Subsequent Event [Member] \| Common Stock [Member] \| Executives, Board of Directors, Employees and Consultants [Member \| Performance Options Without Market Condition [Member]
Subsequent Event [Line Items]
Number of Outstanding Options, Granted	574,482
Weighted Average Price, Granted	$ 6.14
Weighted average grant date fair value of options granted	$ 4.76