Annual report pursuant to Section 13 and 15(d)

Short-Term Investments and Marketable Securities - Schedule of Fair Value of Securities (Detail)

v2.4.0.6
Short-Term Investments and Marketable Securities - Schedule of Fair Value of Securities (Detail) (USD $)
Nov. 30, 2012
Nov. 30, 2011
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities $ 2,283,772 $ 5,345,022
Corporate Obligations [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 995,827 1,698,775
Limited Partnerships [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 292,680 234,445
Common Stock [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 595,626 557,827
Fixed Income [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 399,639  
Preferred Stocks [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities   2,630,948
Mutual Funds [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities   223,027
Quoted Market Price in Active Markets (Level 1) [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 1,287,945 3,613,522
Quoted Market Price in Active Markets (Level 1) [Member] | Corporate Obligations [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities      
Quoted Market Price in Active Markets (Level 1) [Member] | Limited Partnerships [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 292,680 234,445
Quoted Market Price in Active Markets (Level 1) [Member] | Common Stock [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 595,626 557,827
Quoted Market Price in Active Markets (Level 1) [Member] | Fixed Income [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 399,639  
Quoted Market Price in Active Markets (Level 1) [Member] | Preferred Stocks [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities   2,630,948
Quoted Market Price in Active Markets (Level 1) [Member] | Mutual Funds [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities   190,302
Significant Other Observable Inputs (Level 2) [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 995,827 1,731,500
Significant Other Observable Inputs (Level 2) [Member] | Corporate Obligations [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities 995,827 1,698,775
Significant Other Observable Inputs (Level 2) [Member] | Limited Partnerships [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities      
Significant Other Observable Inputs (Level 2) [Member] | Common Stock [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities      
Significant Other Observable Inputs (Level 2) [Member] | Fixed Income [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities     
Significant Other Observable Inputs (Level 2) [Member] | Preferred Stocks [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities     
Significant Other Observable Inputs (Level 2) [Member] | Mutual Funds [Member]
   
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Available-for-sale securities   $ 32,725