XML 41 R20.htm IDEA: XBRL DOCUMENT v2.4.0.6
6. Stock Options (Details 1)
3 Months Ended
Aug. 31, 2012
Stock Options Details 1  
Expected volatility, min 167.15%
Expected volatility, max 185.32%
Risk-free interest rate, min 1.185%
Risk-free interest rate, max 2.05%
Expected life 4 years
Dividend yield 0.00%