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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended
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Nov. 30, 2018 | Nov. 30, 2017 | Nov. 30, 2016
Income Tax [Line Items] |  |  |
Valuation allowance, changes in amount |  | $ (73,000) | $ (329,000)
Effective income tax rate reconciliation at federal statutory income tax rate |  | 34.00% | 34.00%
Income tax expense |  | $ 3,000,000 |
Minimum percentage probability of realized tax benefit on settlement |  | 50.00% |
Uncertain tax provisions |  | $ 0 | $ 0
Material provisions for interest or penalties related to uncertain tax positions |  | $ 0 | $ 0
Scenario, Forecast [Member] |  |  |
Income Tax [Line Items] |  |  |
Effective income tax rate reconciliation at federal statutory income tax rate | 21.00% |  |

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- Definition Minimum percentage probability of realized tax benefit on settlement. + References No definition available. + Details
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- Definition Tax Cuts and Jobs Act of 2017, change in tax rate, income tax expense (benefit). + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32123-109318 + Details
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