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Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Oct. 31, 2018 | Jan. 31, 2018
Share-Based Compensation Arrangement By Share-Based Payment Award, Options Exercisable [Abstract] |  |
Options Exercised | 62,000 |
Weighted Average Exercise Price | $ 19.93 |
Common Stock |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options Exercisable [Abstract] |  |
Options Exercised |  | 80,000
Weighted Average Exercise Price |  | $ 6.54
Shares Net Settled for Exercise |  | 11,996
Shares Withheld for Taxes(1) |  | 0
Net Shares to Individuals |  | 68,004
Weighted Average Share Price for Withholding |  | $ 43.60
Employee Stock Based Tax Withholding (in 000s) |  | $ 0

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- Definition Represents the number of net impact on number of shares settled resulting from exercise. + References No definition available. + Details
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- Definition Amount of Tax Expenses Paid by Company releated to the Share-based Compensation to the taxing authority. + References No definition available. + Details
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