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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 02, 2012 USD ($) | Dec. 31, 2005 USD ($) | Aug. 31, 2015 USD ($) CompensationPlan | Aug. 31, 2014 USD ($) | May. 31, 2014 USD ($) | Aug. 31, 2015 USD ($) CompensationPlan Deliverables | Aug. 31, 2014 USD ($) | Nov. 30, 2014 USD ($)
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Number of deliverables for revenue recognized | Deliverables |  |  |  |  |  | 2 |  |
Period of doubtful for accounts receivable due from client |  |  |  |  |  | 30 days |  |
Contracted storage periods option two |  |  |  |  |  | 21 years |  |
Contracted storage periods option one |  |  |  |  |  | 1 year |  |
Contracted storage periods option three |  |  |  |  |  | Lifetime |  |
Deferred revenue recognition period |  |  |  |  |  | 12 months |  |
Reversal of accounts receivable |  |  |  |  |  | $ 287,000 |  |
Valuation allowance |  |  | $ 3,559,000 |  |  | 3,559,000 |  | $ 10,517,000
Income tax benefit, net of foreign taxes |  |  | 6,931,000 |  |  | 6,881,000 |  |
U.S. Income tax expense |  |  |  | $ 0 |  |  | $ 0 |
Foreign income tax expense |  |  | 25,000 | 25,000 |  | 76,000 | 98,000 |
Provisions for interest or penalties related to uncertain tax positions |  |  | 0 | 0 |  | 0 | 0 |
Uncertain tax provisions |  |  | 0 | 0 |  | 0 | 0 |
Impairment on long-lived assets |  |  | $ 0 | 0 |  | $ 0 | 0 |
Abandonment of patents |  |  |  |  | $ 25,649 |  | 25,649 |
Number of employees stock-based compensation plan | CompensationPlan |  |  | 3 |  |  | 3 |  |
Stock-based compensation expense |  |  | $ 60,000 | 48,000 |  | $ 305,000 | 255,000 |
Unrealized gain(loss) on marketable securities |  |  | (82,958) | 0 |  | 143,318 | 0 |
Payment warranty |  | $ 50,000 |  |  |  |  |  |
Increased payment warranty | $ 75,000 |  |  |  |  |  |  |
Additional payment warranty | $ 10,000 |  |  |  |  |  |  |
Reserves recorded under programs |  |  | 17,000 |  |  | 17,000 |  | $ 17,000
United States [Member] |  |  |  |  |  |  |  |
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Valuation allowance |  |  | 6,957,000 |  |  | 6,957,000 |  |
Other Income and Expense [Member] |  |  |  |  |  |  |  |
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Unrealized holding gain (loss), trading securities |  |  | (11,529) | $ 34,560 |  | (4,813) | $ 11,680 |
Realized gains on disposition of available for sale securities |  |  | $ 0 |  |  | $ 7,361 |  |

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