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Fair Value Measurements - Additional Information (Details) | 9 Months Ended |
--- | --- | ---
Aug. 31, 2019 USD ($) | Aug. 31, 2018 USD ($) | Nov. 30, 2018 $ / shares
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Cash equivalents maximum maturity period | 3 months |  |
Change in fair value remeasurement of contingent consideration liability | $ (19,034,000) | $ 0 |
Transfers between fair value measurement category levels | $ 0 |  |
Maximum |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Held-to-maturity securities, maturity period | 1 year |  |
Other Income (Expense), Net |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Change in fair value remeasurement of contingent consideration liability | $ (19,034,000) |  |
Loss on settlement of outstanding convertible debentures | $ 1,559,000 |  |
Stock Volatility |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Convertible debentures conversion option measurement input |  |  | 0.35
Risk Free Rate |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Convertible debentures conversion option measurement input |  |  | 0.027
Discount Rate |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Convertible debentures conversion option measurement input |  |  | 0.046
Dividend Yields |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Convertible debentures conversion option measurement input | $ / shares |  |  | 0.35

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