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SCHEDULE OF LONG-LIVED ASSETS ARE LOCATED IN CANADA AND UNITED STATES (Details) - USD ($) | Mar. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-lived assets | $ 10,227,604 | $ 10,296,954 | $ 10,965,566
CANADA |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-lived assets | 185,036 | 191,752 | 445,663
UNITED STATES |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-lived assets |  | 10,105,202 | $ 10,519,903
United States and Abroad [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-lived assets | $ 10,042,568 | $ 10,105,202 |

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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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
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=FSI_UnitedStatesandAbroadMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |