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12. SEGMENTED, SIGNIFICANT CUSTOMER INFORMATION AND ECONOMIC DEPENDENCY (Details 1) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]    
Sales generated $ 4,963,887us-gaap_Revenues $ 3,812,981us-gaap_Revenues
Canada [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Sales generated 39,846us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= FSI_CanadaMember		 64,493us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= FSI_CanadaMember
United States [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Sales generated $ 4,924,041us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= FSI_UnitedStatesMember		 $ 3,748,488us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= FSI_UnitedStatesMember