Stock-Based Compensation - Fair Value Assumptions, ESPP (Details) - 2015 Employee Stock Purchase Plan - $ / shares |
6 Months Ended | 8 Months Ended | ||
|---|---|---|---|---|
Apr. 30, 2016 |
Oct. 30, 2015 |
Nov. 01, 2015 |
Mar. 05, 2015 |
|
| Stock-Based compensation | ||||
| Risk-free interest rate | 0.10% | |||
| Expected term | 7 months 2 days | |||
| Expected volatility | 61.00% | |||
| Dividend yield | 0.00% | |||
| Fair market value of common stock (in usd per share) | $ 4.82 | $ 4.89 | $ 11.50 | |
| Fair value per share (in usd per share) | $ 3.84 | |||
| Forecast | ||||
| Stock-Based compensation | ||||
| Risk-free interest rate | 0.27% | |||
| Expected term | 6 months | |||
| Expected volatility | 55.00% | |||
| Dividend yield | 0.00% | |||
| Fair value per share (in usd per share) | $ 1.49 |