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v3.23.1

Fair Value of Financial Instruments (Details Narrative) | 3 Months Ended
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Mar. 31, 2023
Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Sensitive insurance product percentage | 1.50%
Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Sensitive insurance product percentage | 6.50%

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- References No definition available. + Details
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Namespace Prefix: | SNFCA_
Data Type: | dtr-types:percentItemType
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
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |