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v3.23.1

SCHEDULE OF METHOD OF DEPRECIATION (Details) | 3 Months Ended
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Mar. 31, 2023
Computer Equipment [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | 30% Declining balance
Machinery and Equipment [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | 20% Declining balance
Office Equipment [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | 20% Declining balance
Boat [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | 20% Declining balance
Building and Building Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | 10% Declining balance
Trailer [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | 30% Declining balance
Automobiles [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | Straight-line over 5 years
Patents [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | Straight-line over 17 years
Technology Equipment [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | Straight-line over 10 years
Leasehold Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | Straight-line over lease term
Customer Relationships [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | Straight-line over 15 years
Software [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation method used and annual rate | Straight-line over 3 years

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- Definition Depreciation method used and annual rate. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=FSI_BoatMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=FSI_TrailerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_AutomobilesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_PatentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_TechnologyEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=FSI_SoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |