Quarterly report pursuant to Section 13 or 15(d)

Short-Term Investments and Marketable Securities (Details)

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Short-Term Investments and Marketable Securities (Details) (USD $)
Aug. 31, 2012
Nov. 30, 2011
Available for sale securities current:    
Short term investments and marketable securities at cost $ 622,065 $ 2,377,987
Short-term investments and marketable securities 679,424 2,361,996
Available for sale securities noncurrent:    
Marketable Securities Noncurrent Cost 754,492 3,159,099
Marketable securities 743,988 2,983,026
Current and non current cost 1,376,557 5,537,086
Current and non current market value 1,423,412 5,345,022
Corporate Obligations [Member]
    
Available for sale securities current:    
Short term investments and marketable securities at cost 250,000 970,461
Short-term investments and marketable securities 250,901 964,357
Available for sale securities noncurrent:    
Marketable Securities Noncurrent Cost 754,492 754,518
Marketable securities 743,988 734,418
Preferred Stock [Member]
    
Available for sale securities current:    
Short term investments and marketable securities at cost   223,373
Short-term investments and marketable securities   234,445
Available for sale securities noncurrent:    
Marketable Securities Noncurrent Cost   2,404,581
Marketable securities   2,248,608
Common Stock [Member]
    
Available for sale securities current:    
Short term investments and marketable securities at cost 148,692 454,855
Short-term investments and marketable securities 148,218 382,340
Limited Partnership [Member]
    
Available for sale securities current:    
Short term investments and marketable securities at cost 223,373 443,818
Short-term investments and marketable securities 280,305 557,827
Mutual Funds [Member]
    
Available for sale securities current:    
Short term investments and marketable securities at cost   285,480
Short-term investments and marketable securities   $ 223,027