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Common shares (Details Narrative) (CAD)
 12 Months Ended
Dec. 31, 2012
Proceeds, net of issue costs 2,886,024NSFDF_ProceedsNetOfIssueCosts
Fair value attributed to Warrants issued 409,143NSFDF_FairValueAttributedToWarrantsIssued
Total number of warrants issued 4,502,821NSFDF_TotalNumberOfWarrantsIssued
USD  
Finder's fees 183,612NSFDF_FindersFees
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= NSFDF_UnitedStatesDollarMember
Finder's warrants 244,816NSFDF_FindersWarrants
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= NSFDF_UnitedStatesDollarMember
Two Officers subscribed financing 40,000NSFDF_OfficersSubscribedFinancing
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= NSFDF_UnitedStatesDollarMember
Proceeds, net of issue costs 2,886,024NSFDF_ProceedsNetOfIssueCosts
/ us-gaap_FinancialInstrumentAxis
= NSFDF_UnitedStatesDollarMember
Fair value attributed to Warrants issued 409,143NSFDF_FairValueAttributedToWarrantsIssued
/ us-gaap_FinancialInstrumentAxis
= NSFDF_UnitedStatesDollarMember
Total number of warrants issued 4,502,821NSFDF_TotalNumberOfWarrantsIssued
/ us-gaap_FinancialInstrumentAxis
= NSFDF_UnitedStatesDollarMember