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Stock-Based Compensation (Tables) | 9 Months Ended
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Aug. 31, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of Outstanding and Exercisable Stock Options | The following table summarizes stock option transactions for the nine months ended August 31, 2019:
| Options |  | Weighted Average Exercise Price
Options outstanding at beginning of period | 7,237,544 |  |  | $ | 16.02 |
Granted | — |  |  | — |
Exercised | (1,263,505 | ) |  | 14.78 |
Cancelled | (180,000 | ) |  | 33.59 |
Options outstanding at end of period | 5,794,039 |  |  | $ | 15.75 |
Options exercisable at end of period | 5,506,883 |  |  | $ | 15.72 |

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