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Accounts payable and accrued liabilities (Narrative) (Details) (USD $)
Feb. 28, 2014
Nov. 30, 2013
Accrued salaries and vacation $ 805,000 $ 1,119,000
Services [Member]
   
Accrued liabilities   103,000
Accrued and unpaid directors' meeting fees [Member]
   
Accrued liabilities 24,000  
Officers [Member] | Accrued and Unpaid Bonuses [Member]
   
Accrued salaries and vacation $ 684,000