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Stockholders' Equity (Deficit) - Narrative (Details) |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 06, 2017 shares | Apr. 30, 2017 vote $ / shares shares | Jan. 31, 2017 $ / shares shares
Class of Stock [Line Items] |  |  |
Shares authorized, (in shares) |  |  | 120,000,000
Common stock par value (in dollars per share) | $ / shares |  |  | $ 0.0001
Redeemable Convertible Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Redeemable convertible preferred stock converted to common class B stock (in shares) | 59,491,640 |  |
Redeemable preferred stock outstanding (in shares) |  | 0 |
Class A Common Stock |  |  |
Class of Stock [Line Items] |  |  |
Shares authorized, (in shares) |  | 1,000,000,000 |
Common stock par value (in dollars per share) | $ / shares |  | $ 0.0001 |
Common stock outstanding (in shares) |  | 12,782,342 |
Number of votes per share | vote |  | 1 |
Class B Common Stock |  |  |
Class of Stock [Line Items] |  |  |
Common class B stock after conversion of redeemable convertible stock (in shares) | 59,491,640 |  |
Shares authorized, (in shares) |  | 120,000,000 |
Common stock par value (in dollars per share) | $ / shares |  | $ 0.0001 |
Common stock outstanding (in shares) |  | 82,442,536 |
Number of votes per share | vote |  | 10 |

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