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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, 2017 | Aug. 31, 2018 | Aug. 31, 2017
Weighted average values: |  |  |
Expected life | 5 years | 5 years | 5 years
Measurement Input, Expected Dividend Rate [Member] |  |  |
Weighted average values: |  |  |
Expected dividends | 0.00 | 0.00 | 0.00
Measurement Input, Price Volatility [Member] |  |  |
Weighted average values: |  |  |
Expected dividends | 0.5206 | 0.5080 | 0.5206
Measurement Input, Risk Free Interest Rate [Member] |  |  |
Weighted average values: |  |  |
Expected dividends | 0.0182 | 0.0267 | 0.0182

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- Definition Value of input used to measure alternative investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
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