Quarterly report pursuant to sections 13 or 15(d)

Fair Value of Financial Instruments (Details)

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Fair Value of Financial Instruments (Details) (USD $)
3 Months Ended 57 Months Ended 3 Months Ended 1 Months Ended
Oct. 31, 2011
Oct. 31, 2012
Oct. 31, 2011
Warrant derivative liability
Mar. 28, 2012
Series A Warrant
Feb. 29, 2012
Series C Warrant
Fair Value Measurements          
Stock expired unexercised (in shares)         4,000,000
Base floor price (in dollars per share)       $ 0.50  
Decrease in estimated fair value of derivative liabilities $ 3,977,418 $ 3,150,985 $ 3,977,418