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Stockholders' Equity - Fair Value of Options Granted (Detail) - Service-Based Vesting Condition Options [Member]	3 Months Ended		9 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Weighted average values:
Expected life	5 years	0 years	5 years	5 years
Measurement Input, Expected Dividend Rate [Member]
Weighted average values:
Expected dividends	0	0	0	0
Measurement Input, Price Volatility [Member]
Weighted average values:
Expected dividends	49.7	50.8	49.7	50.8
Measurement Input, Risk Free Interest Rate [Member]
Weighted average values:
Expected dividends	1.39	2.67	1.39	2.67

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Fair Value Of Options Weighted Average Values.

+ References

No definition available.

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- Definition

Value of input used to measure alternative investment.

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-SubTopic 10
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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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