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14. SEGMENTED, SIGNIFICANT CUSTOMER INFORMATION AND ECONOMIC DEPENDENCY (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Property, equipment, leasehold and patents | $ 5,999,991 | $ 7,386,242
Canada [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Property, equipment, leasehold and patents | 4,258,075 | 5,424,966
United States and abroad [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Property, equipment, leasehold and patents | $ 1,741,916 | $ 1,961,276

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- Definition Custom Element. + References No definition available. + Details
Name: | FSI_PropertyEquipmentLeaseholdAndPatents
Namespace Prefix: | FSI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration