Quarterly report pursuant to Section 13 or 15(d)

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

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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 9 Months Ended
Feb. 02, 2012
USD ($)
Dec. 31, 2005
USD ($)
Aug. 31, 2015
USD ($)
CompensationPlan
Aug. 31, 2014
USD ($)
May. 31, 2014
USD ($)
Aug. 31, 2015
USD ($)
CompensationPlan
Deliverables
Aug. 31, 2014
USD ($)
Nov. 30, 2014
USD ($)
Basis of Presentation and Significant Accounting Policies [Line Items]                
Number of deliverables for revenue recognized | Deliverables           2    
Period of doubtful for accounts receivable due from client           30 days    
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    
Reversal of accounts receivable           $ 287,000    
Valuation allowance     $ 3,559,000     3,559,000   $ 10,517,000
Income tax benefit, net of foreign taxes     6,931,000     6,881,000    
U.S. Income tax expense       $ 0     $ 0  
Foreign income tax expense     25,000 25,000   76,000 98,000  
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  
Abandonment of patents         $ 25,649   25,649  
Number of employees stock-based compensation plan | CompensationPlan     3     3    
Stock-based compensation expense     $ 60,000 48,000   $ 305,000 255,000  
Unrealized gain(loss) on marketable securities     (82,958) 0   143,318 0  
Payment warranty   $ 50,000            
Increased payment warranty $ 75,000              
Additional payment warranty $ 10,000              
Reserves recorded under programs     17,000     17,000   $ 17,000
United States [Member]                
Basis of Presentation and Significant Accounting Policies [Line Items]                
Valuation allowance     6,957,000     6,957,000    
Other Income and Expense [Member]                
Basis of Presentation and Significant Accounting Policies [Line Items]                
Unrealized holding gain (loss), trading securities     (11,529) $ 34,560   (4,813) $ 11,680  
Realized gains on disposition of available for sale securities     $ 0     $ 7,361