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Schedule of Allowance for Credit Losses (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Marketable Securities [Line Items]
Financing Receivable, Allowance for Credit Loss, Beginning	$ 1,536,926	$ 1,553,836
Financing Receivable, Allowance for Credit Loss, Ending	1,517,783	1,587,525
Commercial Loan [Member]
Marketable Securities [Line Items]
Allowance for credit losses, change in provision	293,798	250,567
Allowance for credit losses, Charge-offs	$ (312,941)	$ (216,878)

X

- Definition

Allowance for credit losses,premiums and other receivables change in provision.

+ References

No definition available.

+ Details

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Namespace Prefix:	SNFCA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Allowance for credit losses premiums and other receivables chargeoffs.

+ References

No definition available.

+ Details

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Namespace Prefix:	SNFCA_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The valuation allowance as of the balance sheet date to reduce the gross amount of receivables to estimated net realizable value, which would be presented in parentheses on the face of the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

+ Details

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Period Type:	instant

X

- 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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- Details

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