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Fair Value Measurements (Detail) - The hierarchy for our financial assets measured at fair value on a recurring basis: (USD $)
Jan. 31, 2013
Oct. 31, 2012
Oct. 31, 2011
Videocon Industries Limited global depository receipts $ 5,730,583 $ 4,728,367  
Total financial assets 7,443,936 5,568,060 8,236,889
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
     
Cash and cash equivalents 1,713,353 339,693 5,685
Fair Value, Inputs, Level 1 [Member] | U.S. Government Securities and Certificates of Deposit [Member]
     
Cash and cash equivalents       
Fair Value, Inputs, Level 1 [Member]
     
Videocon Industries Limited global depository receipts 5,730,583 4,728,367  
Total financial assets 7,443,936 5,068,060 5,387,736
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
     
Cash and cash equivalents         
Fair Value, Inputs, Level 2 [Member] | U.S. Government Securities and Certificates of Deposit [Member]
     
Cash and cash equivalents   500,000  
Fair Value, Inputs, Level 2 [Member]
     
Videocon Industries Limited global depository receipts        
Total financial assets    500,000 2,849,153
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
     
Cash and cash equivalents         
Fair Value, Inputs, Level 3 [Member] | U.S. Government Securities and Certificates of Deposit [Member]
     
Cash and cash equivalents       
Fair Value, Inputs, Level 3 [Member]
     
Videocon Industries Limited global depository receipts        
Total financial assets         
Money Market Funds [Member]
     
Cash and cash equivalents 1,713,353 339,693 5,685
U.S. Government Securities and Certificates of Deposit [Member]
     
Cash and cash equivalents   $ 500,000