General form of registration statement for all companies including face-amount certificate companies

Investments (Detail) - Fair value of investment

v2.4.0.6
Investments (Detail) - Fair value of investment (USD $)
3 Months Ended 12 Months Ended 12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2012
Investment in Videocon [Member]
Oct. 31, 2011
Investment in Videocon [Member]
Oct. 31, 2010
Investment in Videocon [Member]
Oct. 31, 2011
Investment in DISC [Member]
Oct. 31, 2012
Investment in DISC [Member]
Oct. 31, 2010
Investment in DISC [Member]
Fair Value     $ 4,728,367 $ 5,382,051 $ 4,728,367 $ 5,382,051 $ 8,524,821   $ 0  
Fair Value and Cost Basis as of October 31, 2010     16,200,000   16,200,000         143,989
DISC common stock sold in fiscal 2011               (88,608)    
Unrealized loss 1,002,216 (104,709)     (653,684)          
Reversal of unrealized gain           (1,419,557)   7,199    
Other than temporary impairment           $ (1,723,213)   $ (62,580)