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Stock Options - Fair Value of Options Granted (Detail) (Service-Based Vesting Condition Options [Member])
3 Months Ended
Feb. 28, 2013
Service-Based Vesting Condition Options [Member]
 
Weighted average values:  
Expected dividends 0.00%
Expected volatility 113.80%
Risk free interest rate 0.80%
Expected life 5 years