Quarterly report pursuant to Section 13 or 15(d)

Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)

v3.21.2
Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 11, 2018
Jun. 01, 2017
USD ($)
Feb. 01, 2012
USD ($)
Dec. 31, 2005
USD ($)
May 31, 2021
USD ($)
Nov. 30, 2020
USD ($)
May 31, 2020
USD ($)
May 31, 2021
USD ($)
Segment
Unit
May 31, 2020
USD ($)
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                  
Number of reportable segments | Segment               3  
Deferred revenue         $ 38,227,319     $ 38,227,319  
Warranty payment   $ 100,000 $ 75,000 $ 50,000          
Offset personal expenses   10,000              
Commission paid         8,198   $ 11,609 21,705 $ 23,144
Additional capitalized contract acquisition costs, net of amortization expense         27,672   22,481 45,934 45,801
Impairment of contract assets         0   0 0 0
Impairment of public inventory           $ 1,284,238      
Uncertain tax provisions         0     0  
Provisions for interest or penalties related to uncertain tax positions         0   0 0 0
Impairment on long lived assets         0   0 0 0
Stock-based option compensation expense         68,000   64,000 153,000 289,000
Unrealized holding (losses) gains, marketable securities         $ (13,000)   $ (54,000) $ (15,000) $ 1,000
Number of units anticipated to be sold each year | Unit               17  
Percentage of decline in annual sales               3.00%  
Payment warranty       $ 50,000          
Increased payment warranty   $ 100,000 75,000            
Additional payment warranty     $ 10,000            
Discount Rate [Member]                  
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                  
Contingent consideration measurement input         5.25     5.25  
ASU 2016-02 [Member]                  
Business, Basis of Presentation and Significant Accounting Policies [Line Items]                  
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]         true     true  
Change in Accounting Principle, Accounting Standards Update, Adoption Date         Dec. 01, 2019     Dec. 01, 2019  
Change in Accounting Principle, Accounting Standards Update, Transition Option Elected [Extensible List]               us-gaap:AccountingStandardsUpdate201602RetrospectiveMember  
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     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.