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Net Loss Per Share Attributable to Common Stockholders (Tables) | 12 Months Ended
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Jan. 31, 2016
Earnings Per Share [Abstract] |
Summary of Computation of Basic and Diluted Net Loss Per Share | The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share amounts):
|  | Year Ended January 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
|  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (49,448 | ) |  | $ | (153,500 | ) |  | $ | (1,677 | ) |  | $ | (166,550 | ) |  | $ | — |  |  | $ | (168,557 | )
Add: accretion of redeemable convertible preferred stock |  |  | — |  |  |  | — |  |  |  | (115 | ) |  |  | (11,388 | ) |  |  | — |  |  |  | (341 | )
Add: deemed dividend on the conversion of Series F redeemable convertible preferred stock |  |  | — |  |  |  | — |  |  |  | (23 | ) |  |  | (2,239 | ) |  |  | — |  |  |  | — |
Net loss attributable to common stockholders |  | $ | (49,448 | ) |  | $ | (153,500 | ) |  | $ | (1,815 | ) |  | $ | (180,177 | ) |  | $ | — |  |  | $ | (168,898 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of shares outstanding—basic and diluted |  |  | 29,540 |  |  |  | 91,700 |  |  |  | 158 |  |  |  | 15,696 |  |  |  | — |  |  |  | 11,341 |
Net loss per share attributable to common stockholders—basic and diluted |  | $ | (1.67 | ) |  | $ | (1.67 | ) |  | $ | (11.48 | ) | * | $ | (11.48 | ) |  | $ | — |  |  | $ | (14.89 | )
* | Amounts cannot be recalculated due to rounding
Summary of Weighted Average Outstanding Shares Excluded from Computation of Diluted Net Loss per Share | The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because the impact of including them would have been antidilutive (in thousands):
|  | Year Ended January 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Redeemable convertible preferred stock |  |  | — |  |  |  | 79,519 |  |  |  | 71,465 |
Options to purchase common stock |  |  | 16,654 |  |  |  | 18,146 |  |  |  | 17,036 |
Restricted stock units |  |  | 7,233 |  |  |  | 2,994 |  |  |  | 1 |
Employee stock purchase plan |  |  | 3,944 |  |  |  | — |  |  |  | — |
Warrants to purchase redeemable convertible preferred stock |  |  | — |  |  |  | 86 |  |  |  | 736 |
Repurchasable shares from early-exercised options and unvested restricted stock |  |  | 551 |  |  |  | 623 |  |  |  | 764 |
Contingently issuable common stock |  |  | 115 |  |  |  | 91 |  |  |  | — |
|  |  | 28,497 |  |  |  | 101,459 |  |  |  | 90,002 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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