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Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 05, 2017 USD ($) | Feb. 01, 2012 USD ($) | Dec. 31, 2005 USD ($) | Aug. 31, 2018 USD ($) CompensationPlan | Aug. 31, 2017 USD ($) | Aug. 31, 2018 USD ($) CompensationPlan Deliverables Segments Unit shares | Aug. 31, 2017 USD ($) | Nov. 30, 2017 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Number of deliverables for revenue recognized | Deliverables |  |  |  |  |  | 2 |  |
Period of doubtful for accounts receivable due from client |  |  |  |  |  | 21 years |  |
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 |  |
Valuation allowance |  |  |  | $ 1,605,000 |  | $ 1,605,000 |  | $ 2,316,000
U.S. Income tax expense (benefit) |  |  |  | 245,000 | $ 437,000 | 3,741,000 | $ 1,039,000 |
Income tax expense related to the reduction of the federal tax |  |  |  |  |  | $ 2,985,000 |  |
Federal tax rate |  |  |  |  |  | 21.00% |  |
Foreign income tax expense |  |  |  | 58,000 | 53,000 | $ 80,000 | 89,000 |
Minimum percentage probability of realized tax benefit on settlement |  |  |  |  |  | 50.00% |  |
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 |
Goodwill |  |  |  | $ 2,007,976 |  | $ 2,007,976 |  | 0
Number of employee stock based compensation plan | CompensationPlan |  |  |  | 2 |  | 2 |  |
Stock-based option compensation expense |  |  |  | $ 55,000 | 238,000 | $ 324,000 | 709,000 |
Stock compensation expense reversed |  |  |  |  |  | $ 444,000 |  |
Stock compensation, number of shares opted to lump sum cash payment | shares |  |  |  |  |  | 30,000 |  |
Unrealized holding gain and loss, trading securities |  |  |  | 37,536 | 4,784 | $ 12,328 | (60,425) |
Unrealized gain on marketable securities, net of tax |  |  |  | 285,255 | $ 34,038 | 405,255 | $ 60,678 |
Payment warranty |  |  | $ 50,000 |  |  |  |  |
Increased payment warranty |  | $ 75,000 |  |  |  |  |  |
Additional payment warranty |  | $ 10,000 |  |  |  |  |  |
Reserves recorded under programs |  |  |  | $ 18,000 |  | $ 18,000 |  | $ 18,000
Duke University [Member] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Asset purchase agrrement closing date |  |  |  |  |  | Jan. 31, 2020 |  |
Accounts Receivable [Member] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Period of doubtful for accounts receivable due from client |  |  |  |  |  | 30 days |  |
Umbilical Cord Blood and Cord Tissue Stem Cell Service and PrepaCyte-CB [Member] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Number of reportable segments | Segments |  |  |  |  |  | 3 |  |
Umbilical Cord Blood and Cord Tissue Stem Cell Service and PrepaCyte-CB [Member] | Duke University [Member] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Inventory, in units | Unit |  |  |  |  |  | 5,917 |  |
Number of units, per month | Unit |  |  |  |  |  | 12 |  |
Umbilical Cord Blood and Cord Tissue Stem Cell Service and PrepaCyte-CB [Member] | Duke University [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Inventory, in units | Unit |  |  |  |  |  | 144 |  |
PrepaCyte CB [Member] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Payment warranty | $ 75,000 |  |  |  |  |  |  |
Increased payment warranty | $ 100,000 |  |  |  |  |  |  |

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