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Income taxes (Narrative) (Details) (USD $)
 12 Months Ended
Nov. 30, 2014
Change in control percentage 50.00%ncq_ChangeInControlPercentage
U.S. carryforward losses $ 110,600,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign
Approximations [Member]  
Loss carryforwards 123,100,000us-gaap_OperatingLossCarryforwards
/ us-gaap_StatementScenarioAxis
= ncq_ApproximationsMember
Approximations [Member] | U.S. Losses Subject to Limitation [Member]  
U.S. carryforward losses $ 42,600,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign
/ us-gaap_StatementScenarioAxis
= ncq_ApproximationsMember
/ us-gaap_TaxCreditCarryforwardAxis
= ncq_UsLossesSubjectToLimitationMember