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BASIS OF PRESENTATION (Details Narrative) | 6 Months Ended
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Jun. 30, 2024
317 Mendota LLC [Member] |
Subsidiary company ownership interest rate | 80.00%
ENP Investments LLC and ENP Mendota [Member] |
Subsidiary company ownership interest rate | 65.00%

X
- Definition The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_OwnershipAxis=FSI_MendotaLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=FSI_ENPInvestmentsLLCAndENPMendotaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |