Fair Value Measurements - Additional Information (Details)	12 Months Ended
	Nov. 30, 2019 USD ($)	Sep. 30, 2019 $ / shares	Nov. 30, 2018 USD ($)	Nov. 30, 2017 USD ($)
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)
Transfers between fair value measurement category levels	$ 0		$ 0	$ 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