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Summary of Significant Accounting Policies (Details 2) | 1 Months Ended
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May. 31, 2015 shares | Apr. 30, 2015
Conversion of stock |  |
Common stock split ratio |  | 0.144927536
Conversion of redeemable convertible preferred stock into common stock | Redeemable Convertible Preferred Stock |  |
Conversion of stock |  |
Number of shares of common stock into which convertible preferred stock was converted | 12,591,456 |

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