Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

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- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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Related Party Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Jul. 22, 2015	Jul. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Common stock, shares issued			39,393,903	12,563,095
Technology Crossover Ventures [Member]
Related Party Transaction [Line Items]
Net proceeds from offerings	$ 5.0	$ 5.0
Common stock, shares issued	312,500
Price per share equal to IPO price	$ 16.00
Technology Crossover Ventures [Member] \| Private Placement [Member]
Related Party Transaction [Line Items]
Common stock, shares issued		312,500
Price per share equal to IPO price		$ 16.00
Minimum [Member] \| Technology Crossover Ventures [Member] \| Private Placement [Member]
Related Party Transaction [Line Items]
Percentage of ownership held by stockholders		5.00%