Redeemable Convertible Preferred Stock - Additional Information (Detail) - $ / shares	12 Months Ended
Feb. 29, 2016	Nov. 30, 2013
Class of Stock [Line Items]
Number of redeemable convertible preferred stock converted to common stock (in shares)		17,626,227
Conversion ratio	1
Convertible Preferred Stock, Threshold Approval Percentage for Automatic Conversion	66.67%
Series A Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Conversion rate of convertible preferred stock to common stock (usd per share)	$ 3.98
Liquidation preference price per share (usd per share)	5.97
Redemption price per share (usd per share)	3.98
Series B Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Conversion rate of convertible preferred stock to common stock (usd per share)	16.84
Liquidation preference price per share (usd per share)	21.04
Redemption price per share (usd per share)	$ 16.84

Conversion Rate Of Common Share

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- Definition

Convertible Preferred Stock, Threshold Approval Percentage for Automatic Conversion

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- Definition

Preferred Stock Conversion Ratio

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Number of shares issued for each share of convertible preferred stock that is converted.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

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- Definition

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
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-Subparagraph (SX 210.4-08.(d)(1))
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-Number 210
-Section 02
-Paragraph 29
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The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.

+ References

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-Topic 505
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