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Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
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Dec. 01, 2018 USD ($) | Jun. 01, 2017 USD ($) | Feb. 01, 2012 USD ($) | Dec. 31, 2005 USD ($) | May 31, 2019 USD ($) CompensationPlan | Feb. 28, 2019 USD ($) | May 31, 2018 USD ($) | May 31, 2019 USD ($) Segments CompensationPlan Unit shares | May 31, 2018 USD ($) | Nov. 30, 2018 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  | $ 30,500,610 |  |  | $ 30,500,610 |  |
Deferred revenue current |  |  |  |  | 8,516,593 |  |  | 8,516,593 |  |
Warranty payment |  | $ 100,000 | $ 75,000 | $ 50,000 |  |  |  |  |  |
Offset personal expenses |  | 10,000 |  |  |  |  |  |  |  |
Commission paid |  |  |  |  | 7,826 |  |  | 14,469 |  |
Capitalized contract acquisition costs, net of amortization expense | $ 329,231 |  |  |  |  |  |  |  |  |
Cumulative amortization expense | 66,533 |  |  |  |  |  |  |  |  |
Additional capitalized contract acquisition costs, net of amortization expense |  |  |  |  | 20,954 |  |  | 23,534 |  |
Valuation allowance |  |  |  |  | 1,634,000 |  |  | 1,634,000 |  | $ 1,634,000
U.S. Income tax expense (benefit) |  |  |  |  | 29,000 |  | $ 294,000 | 134,000 | $ 3,497,000 |
Income tax expense related to the reduction of the federal tax |  |  |  |  |  |  |  | $ 2,985,000 |  |
Federal tax rate |  |  |  |  |  |  |  | 21.00% |  |
Foreign Income Tax Expense |  |  |  |  | 22,000 |  | 22,000 | $ 22,000 | 22,000 |
Minimum percentage probability of realized tax benefit on settlement |  |  |  |  |  |  |  | 50.00% |  |
Provisions for interest or penalties related to uncertain tax positions |  |  |  |  | 0 |  |  |  | 0 |
Uncertain tax provisions |  |  |  |  | 0 |  | 0 | $ 0 | 0 |
Impairment on long lived assets |  |  |  |  |  |  |  | 0 | 0 |
Goodwill |  |  |  |  | $ 1,941,411 |  |  | $ 1,941,411 |  | $ 1,941,411
Number of employee stock based compensation plan | CompensationPlan |  |  |  |  | 2 |  |  | 2 |  |
Stock-based option compensation expense |  |  |  |  | $ 87,000 |  | 156,000 | $ 226,000 | 268,000 |
Unrealized holding losses, trading securities |  |  |  |  |  |  | 9,016 | 25,208 | (25,208) |
Unrealized (loss) gain on marketable securities, net of tax |  |  |  |  |  |  | 1,254 |  | 120,000 |
Cumulative-effect adjustment from accumulated other comprehensive income to retained earnings |  |  |  |  |  | $ 341,000 |  |  |  |
Unrealized holding losses, marketable securities |  |  |  |  | 31,000 |  |  | $ (36,000) |  |
Payment warranty |  |  |  | $ 50,000 |  |  |  |  |  |
Increased payment warranty |  | $ 100,000 | 75,000 |  |  |  |  |  |  |
Additional payment warranty |  |  | $ 10,000 |  |  |  |  |  |  |
Stock compensation expense reversed |  |  |  |  |  |  | $ 444,000 |  |  |
Stock compensation, number of shares opted to lump sum cash payment | shares |  |  |  |  |  |  |  | 30,000 |  |
Impairment charges |  |  |  |  | 2,332,763 |  |  | $ 2,332,763 |  |
Duke University [Member] |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |
Asset purchase agrrement closing date |  |  |  |  |  |  |  | Jan. 31, 2020 |  |
Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |
Incremental contract acquisition cost | 329,231 |  |  |  |  |  |  |  |  |
Reversed incremental acquisition cost | 18,408 |  |  |  |  |  |  |  |  |
ASC 606 adoption adjustment, net of tax | 253,447 |  |  |  |  |  |  | $ 253,447 |  |
Cumulative effect on retained earnings, tax | $ 94,192 |  |  |  |  |  |  |  |  |
Option One [Member] |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  |  | 21 years |  |  | 21 years |  |
Option Two [Member] |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  |  | 1 year |  |  | 1 year |  |
Option Three [Member] |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  |  |  |  |  | life-time |  |
Contracted storage amortization description |  |  |  |  |  |  |  | The life-time storage plan is based on a life expectancy of 81 years, which is the current estimate by the Center for Disease Control for United States women’s life expectancy and concluded that additional data analysis would result in an immaterial difference in revenue |  |
Previously Reported [Member] |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |
Unrealized (loss) gain on marketable securities, net of tax |  |  |  |  |  |  |  |  | $ 120,000 |
Accounts Receivables [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 |  |  |  |  |  |  |  | 5,977 |  |
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 |  |

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