Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 6 Months Ended
Feb. 01, 2012
USD ($)
Dec. 31, 2005
USD ($)
May 31, 2018
USD ($)
CompensationPlan
shares
May 31, 2017
USD ($)
May 31, 2018
USD ($)
CompensationPlan
Deliverables
Segments
May 31, 2017
USD ($)
Nov. 30, 2017
USD ($)
Schedule of Available-for-sale Securities [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)     294,000 $ 296,000 3,497,000 $ 602,000  
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 36,000 $ 22,000 36,000  
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  
Number of employee stock based compensation plan | CompensationPlan     2   2    
Stock-based option compensation expense     $ 156,000 394,000 $ 268,000 471,000  
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     $ 9,016 (38,590) (25,208) (65,210)  
Unrealized gain on marketable securities, net of tax     1,254 $ 33,701 120,000 $ 26,640  
Payment warranty   $ 50,000          
Increased payment warranty $ 75,000            
Additional payment warranty $ 10,000            
Reserves recorded under programs     $ 18,000   $ 18,000   $ 18,000
Accounts Receivable [Member]              
Schedule of Available-for-sale Securities [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]              
Schedule of Available-for-sale Securities [Line Items]              
Number of reportable segments | Segments         2