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Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 01, 2017 USD ($) | Feb. 01, 2012 USD ($) | Dec. 31, 2005 USD ($) | Feb. 29, 2020 USD ($) Segments CompensationPlan Unit | Feb. 28, 2019 USD ($) | May 31, 2019 USD ($) | Dec. 01, 2018 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |
Deferred revenue |  |  |  | $ 33,065,271 |  |  |
Deferred revenue current |  |  |  | 8,610,304 |  |  |
Warranty payment | $ 100,000 | $ 75,000 | $ 50,000 |  |  |  |
Offset personal expenses | 10,000 |  |  |  |  |  |
Commission paid |  |  |  | 11,535 | $ 6,643 |  |
Capitalized contract acquisition costs, net of amortization expense |  |  |  |  |  |  | $ 329,231
Cumulative amortization expense |  |  |  |  |  |  | $ 66,533
Additional capitalized contract acquisition costs, net of amortization expense |  |  |  | 23,320 | 20,954 |  |
Provisions for interest or penalties related to uncertain tax positions |  |  |  | 0 | 0 |  |
Uncertain tax provisions |  |  |  | 0 | 0 |  |
Impairment on long lived assets |  |  |  | $ 0 | 0 |  |
Number of employee stock based compensation plan | CompensationPlan |  |  |  | 2 |  |  |
Cumulative-effect adjustment from accumulated other comprehensive income to retained earnings |  |  |  |  | 341,000 |  |
Unrealized holding gain (losses), marketable securities |  |  |  | $ 55,000 | 67,000 |  |
Payment warranty |  |  | $ 50,000 |  |  |  |
Increased payment warranty | $ 100,000 | 75,000 |  |  |  |  |
Additional payment warranty |  | $ 10,000 |  |  |  |  |
Impairment charges |  |  |  |  |  | $ 2,332,763 |
Stock-based option compensation expense |  |  |  | $ 224,000 | $ 139,000 |  |
Deferred revenue recognition period |  |  |  | 12 months |  |  |
Option One [Member] |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  | 20 years |  |  |
Option Two [Member] |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  | 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 |  |  |
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 |  |  |  | 6,000 |  |  |
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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