XML 118 R105.htm IDEA: XBRL DOCUMENT
v3.21.1

13) Stock Compensation Plans (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Text Block [Abstract] |  |
Share-based Payment Arrangement, Amount Capitalized | $ 358,878 | $ 256,996
Unrecognized compensation expense related to the options issued in December 2014 | 39,152 |
Total intrinsic value | $ 663,901 | $ 271,220

X
- Definition Represents the monetary amount of Total intrinsic value, during the indicated time period. + References No definition available. + Details
Name: | snfc_TotalIntrinsicValue
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the monetary amount of Unrecognized compensation expense related to the options issued in December 2014, as of the indicated date. + References No definition available. + Details
Name: | snfc_UnrecognizedCompensationExpenseRelatedToTheOptionsIssuedInDecember2014
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost capitalized for award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration