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Accounts payable and accrued liabilities (Narrative) (Details) (USD $)	12 Months Ended
	Nov. 30, 2014	Nov. 30, 2013
Accrued salaries and vacation	$ 533,000us-gaap_AccruedSalariesCurrent	$ 1,119,000us-gaap_AccruedSalariesCurrent
Reversal of obligation amount	293,000
Officers [Member]
Accrued salaries and vacation		711,000
Officers [Member] \| Accrued and Unpaid Bonuses [Member]
Accrued salaries and vacation	384,000
Employees and Directors [Member] \| Accrued and Unpaid Bonuses [Member]
Accrued salaries and vacation		$ 970,000

Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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