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10. STOCK OPTIONS (Details Narrative) (USD $)
3 Months Ended 12 Months Ended 3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Options granted 159,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 227,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross  
Compensation expense related to non-vested awards $ 52,787us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Compensation expense related to non-vested awards, weighted average period 9 months    
Consultants      
Options granted 60,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_ConsultantsMember
  85,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_ConsultantsMember
Stock granted expenses 5,891FSI_StockGrantedExpenses
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_ConsultantsMember
  6,161FSI_StockGrantedExpenses
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_ConsultantsMember
Additional Expenses due to Options granted 837FSI_AdditionalExpensesDueToOptionsGranted
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_ConsultantsMember
  1,871FSI_AdditionalExpensesDueToOptionsGranted
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_ConsultantsMember
Employees      
Options granted 99,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_EmployeesMember
  127,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_EmployeesMember
Stock granted expenses 9,720FSI_StockGrantedExpenses
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_EmployeesMember
  9,205FSI_StockGrantedExpenses
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_EmployeesMember
Additional Expenses due to Options granted $ 1,148FSI_AdditionalExpensesDueToOptionsGranted
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_EmployeesMember
  $ 3,456FSI_AdditionalExpensesDueToOptionsGranted
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= FSI_EmployeesMember