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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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Jun. 11, 2018 | Jun. 01, 2017 USD ($) | Feb. 01, 2012 USD ($) | Dec. 31, 2005 USD ($) | May 31, 2022 USD ($) | Nov. 30, 2021 USD ($) | May 31, 2021 USD ($) | May 31, 2022 USD ($) Unit Segment | May 31, 2021 USD ($) | Apr. 08, 2022 shares | Feb. 28, 2022
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | Segment |  |  |  |  |  |  |  | 3 |  |  |
Deferred revenue |  |  |  |  | $ 42,664,189 |  |  | $ 42,664,189 |  |  |
Warranty payment |  | $ 100,000 | $ 75,000 | $ 50,000 |  |  |  |  |  |  |
Commission paid |  |  |  |  | 12,169 |  | $ 8,198 | 27,321 | $ 21,705 |  |
Additional capitalized contract acquisition costs, net of amortization expense |  |  |  |  | 27,170 |  | 27,672 | 51,759 | 45,934 |  |
Impairment of contract assets |  |  |  |  | 0 |  |  | 0 |  |  |
Impairment of public inventory |  |  |  |  |  | $ 1,164,499 |  |  |  |  |
Uncertain tax provisions |  |  |  |  | 0 |  |  | 0 |  |  |
Provisions for interest or penalties related to uncertain tax positions |  |  |  |  |  |  |  | 0 | 0 |  |
Impairment on long lived assets |  |  |  |  | 0 |  | 0 | 0 |  |  |
Stock-based option compensation expense |  |  |  |  | 117,000 |  | 68,000 | 149,000 | 153,000 |  |
Unrealized Gain Loss on Marketable Securities |  |  |  |  | $ 18,000 |  | $ 13,000 | $ 27,000 | $ 15,000 |  |
Payment warranty |  |  |  | $ 50,000 |  |  |  |  |  |  |
Increased payment warranty |  | $ 100,000 | $ 75,000 |  |  |  |  |  |  |  |
Common Stock Issued | shares |  |  |  |  |  |  |  |  |  | 1,500,000 |
Cord:Use [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquisition date | Jun. 11, 2018 |  |  |  |  |  |  |  |  |  |
Duke University [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  |  |  |  |  |  |  |  | 16 years
Umbilical Cord Blood and Cord Tissue Stem Cell Service and PrepaCyte-CB [Member] | Duke University [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Agreement expiration date |  |  |  |  |  |  |  | Jan. 31, 2025 |  |  |
Inventory, in units | Unit |  |  |  |  |  |  |  | 6,000 |  |  |
Number of units, per month | Unit |  |  |  |  |  |  |  | 12 |  |  |
Maximum [Member] | Umbilical Cord Blood and Cord Tissue Stem Cell Service and PrepaCyte-CB [Member] | Duke University [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Inventory, in units | Unit |  |  |  |  |  |  |  | 144 |  |  |
Accounts Receivables [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Period of doubtful for accounts receivable due from client |  |  |  |  |  |  |  | 30 days |  |  |
Option One [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  |  | 21 years |  |  | 21 years |  |  |
Option Two [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contracted storage amortization period |  |  |  |  | 1 year |  |  | 1 year |  |  |
Option Three [Member] |  |  |  |  |  |  |  |  |  |  |
Business, Basis of Presentation and Significant Accounting Policies [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. |  |  |

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