XML 85 R73.htm IDEA: XBRL DOCUMENT
v3.22.4

Property and Equipment (Details) - Schedule of estimated useful lives of property and equipment | 12 Months Ended
--- | ---
Dec. 31, 2022
Software [Member] |
Property and Equipment (Details) - Schedule of estimated useful lives of property and equipment [Line Items] |
Property and equipment, estimated useful life (in years) | 3 years
Furniture and equipment [Member] | Minimum [Member] |
Property and Equipment (Details) - Schedule of estimated useful lives of property and equipment [Line Items] |
Property and equipment, estimated useful life (in years) | 5 years
Furniture and equipment [Member] | Maximum [Member] |
Property and Equipment (Details) - Schedule of estimated useful lives of property and equipment [Line Items] |
Property and equipment, estimated useful life (in years) | 7 years
Leasehold Improvements [Member] | Minimum [Member] |
Property and Equipment (Details) - Schedule of estimated useful lives of property and equipment [Line Items] |
Property and equipment, estimated useful life (in years) | 5 years
Leasehold Improvements [Member] | Maximum [Member] |
Property and Equipment (Details) - Schedule of estimated useful lives of property and equipment [Line Items] |
Property and equipment, estimated useful life (in years) | 15 years
Buildings [Member] |
Property and Equipment (Details) - Schedule of estimated useful lives of property and equipment [Line Items] |
Property and equipment, estimated useful life (in years) | 40 years

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

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=sfst_SoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=sfst_FurnitureAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=sfst_BuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |