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Prepaid expenses and deposits (Details) (CAD) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current:
Prepaid insurance and deposits	968noa_PrepaidInsuranceandDeposits	1,076noa_PrepaidInsuranceandDeposits
Prepaid lease payments	537us-gaap_PrepaidRent	880us-gaap_PrepaidRent
Prepaid interest	748us-gaap_PrepaidInterest	196us-gaap_PrepaidInterest
Prepaid expenses and deposits	2,253us-gaap_PrepaidExpenseCurrent	2,152us-gaap_PrepaidExpenseCurrent
Long term:
Prepaid lease payments (note 11(a))	1,953noa_PrepaidRentNoncurrent	1,274noa_PrepaidRentNoncurrent

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Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Assets

-URI http://asc.fasb.org/extlink&oid=6509628



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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Assets

-URI http://asc.fasb.org/extlink&oid=6509628



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-URI http://asc.fasb.org/extlink&oid=6509628



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