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Stockholders' Equity - Stock Option Activity (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2018 | Aug. 31, 2017 | Nov. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted | 0 | 22,500 | 51,636 | 22,500 |
Service-Based Vesting Condition Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Outstanding at November 30, 2017 |  |  | 1,026,979 |  |
Granted |  |  | 51,636 |  |
Exercised |  |  | (63,750) |  |
Expired/forfeited |  |  | (13,500) |  |
Outstanding at August 31, 2018 | 1,001,365 |  | 1,001,365 |  | 1,026,979
Exercisable at August 31, 2018 | 961,111 |  | 961,111 |  |
Outstanding at November 30, 2017 |  |  | $ 2.50 |  |
Granted, Weighted Average Exercise Price |  |  | 7.85 |  |
Exercised, Weighted Average Exercise Price |  |  | 2.68 |  |
Expired/forfeited, Weighted Average Exercise Price |  |  | 2.18 |  |
Outstanding at August 31, 2018, Weighted Average Exercise Price | $ 2.77 |  | 2.77 |  | $ 2.50
Exercisable at August 31, 2018, Weighted Average Exercise Price | $ 2.58 |  | $ 2.58 |  |
Outstanding at August 31, 2018 Weighted Average Remaining Contractual Term (Years) |  |  | 4 years 2 months 19 days |  | 4 years 5 months 23 days
Exercisable at August 31, 2018, Weighted Average Remaining Contractual Term (Years) |  |  | 4 years 2 months 1 day |  |
Outstanding at November 30, 2017 |  |  | $ 5,706,107 |  |
Granted |  |  | 29,774 |  |
Exercised |  |  | 343,935 |  |
Expired/forfeited |  |  | 84,435 |  |
Outstanding at August 31, 2018 | $ 5,664,941 |  | 5,664,941 |  | $ 5,706,107
Exercisable at August 31, 2018 | $ 5,619,667 |  | $ 5,619,667 |  |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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