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Preferred shares (Details 1) (CAD)
Dec. 31, 2014
Preferred Shares Details 1  
Convertible upon issue, Shares 2,000,000NSFDF_ConvertiblePrefferedSharesUponIssueShares
Convertible upon issue, Amount 3,256,400NSFDF_ConvertiblePrefferedSharesUponIssueAmount
Conditionally convertible, Shares 8,000,000NSFDF_ConditionallyConvertiblePrefferedSharesShares
Conditionally convertible, Amount 232,600NSFDF_ConditionallyConvertiblePrefferedSharesAmount
Total Convertible Shares 10,000,000NSFDF_ConvertiblePrefferedSharesShares
Total Convertible Amount 3,489,000NSFDF_ConvertiblePrefferedSharesAmount