Consolidated Balance Sheets (CAD)	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	50,635	3,319,627
Short term investments	5,173,430us-gaap_ShortTermInvestments	2,449,450us-gaap_ShortTermInvestments
Restricted cash [note 3]		53,921us-gaap_RestrictedCashAndInvestments
Accounts receivable	248,930us-gaap_AccountsReceivableNetCurrent	295,879us-gaap_AccountsReceivableNetCurrent
Work-in-progress		299,842NSFDF_Workinprogress
Prepaid expenses and other	338,644us-gaap_OtherPrepaidExpenseCurrent	158,456us-gaap_OtherPrepaidExpenseCurrent
Total current assets	5,811,639us-gaap_AssetsCurrent	6,577,175us-gaap_AssetsCurrent
Long term assets
Property and equipment [note 4]	237,464us-gaap_PropertyPlantAndEquipmentOther	262,818us-gaap_PropertyPlantAndEquipmentOther
Total assets	6,049,103us-gaap_Assets	6,839,993us-gaap_Assets
Current liabilities:
Accounts payable and accrued liabilities [note 5]	782,626	939,355
Deferred revenue		2,781,101us-gaap_DeferredRevenue
Fair value of US$ Warrants [note 12]		1,238,000us-gaap_DerivativeLiabilities
Net current liabilities	782,626us-gaap_LiabilitiesCurrent	4,958,456us-gaap_LiabilitiesCurrent
Long term liabilities:
Asset retirement obligation [note 6]	50,000us-gaap_AssetRetirementObligation	64,560us-gaap_AssetRetirementObligation
Total liabilities	832,626us-gaap_Liabilities	5,023,016us-gaap_Liabilities
Future operations [note 1]
Commitments and contingencies [note 15]
Subsequent events [note 10]
Shareholders' equity:
Common shares [note 7]: - authorized unlimited, Issued: 44,958,843 (2013 - 42,418,326) common shares	65,792,307us-gaap_CommonStockValue	61,340,321us-gaap_CommonStockValue
Preferred shares [note 8]: - authorized unlimited, Issued: 8,000,000 (2013 - 8,000,000) Preferred shares	232,600us-gaap_PreferredStockValue	232,600us-gaap_PreferredStockValue
Contributed capital	6,400,789NSFDF_ContributedCapital	5,889,914NSFDF_ContributedCapital
Deficit	(67,920,154)	(66,356,793)
Accumulated other comprehensive income	710,935	710,935
Net Shareholders' equity	5,216,477us-gaap_StockholdersEquity	1,816,977us-gaap_StockholdersEquity
Total Liabilities and Shareholders' equity	6,049,103	6,839,993

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

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-Name Accounting Standards Codification

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5

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