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Fair value measurement (Tables)
3 Months Ended
May 31, 2013
Fair Value Disclosures [Abstract]  
Fair Value Measurement
  Level I   Level II   Level III   Fair Value
May 31, 2013                              
Convertible notes payable         152,553             152,553  
Derivative liability         49,766               49,766  
  $     $ 202,319     $     $ 202,319