Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
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, 2016
USD ($)
CompensationPlan
May 31, 2015
USD ($)
May 31, 2016
USD ($)
CompensationPlan
Deliverables
May 31, 2015
USD ($)
Nov. 30, 2015
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     $ 2,630,000   $ 2,630,000   $ 2,630,000
U.S. Income tax expense     148,000 $ 0 148,000 $ 0  
Foreign income tax expense     54,000 25,000 $ 54,000 51,000  
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     3   3    
Stock option compensation expense     $ 136,000 54,000 $ 388,000 245,000  
Unrealized holding gain (losses), trading securities     (823) 3,768 (20,652) (645)  
Unrealized gain (losses) on marketable securities, net of tax     (6,493) 226,276 (100,220) 226,276  
Payment warranty   $ 50,000          
Increased payment warranty $ 75,000            
Additional payment warranty $ 10,000            
Reserves recorded under programs     $ 17,000   $ 17,000   $ 17,000
Other Income and Expense [Member]              
Schedule of Available-for-sale Securities [Line Items]              
Realized gains on disposition of available for sale securities       $ 7,361   $ 7,361