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Prepayments and Other Assets, Net - Schedule of Allowance for Credit Losses for Prepayments and Other Assets (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
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Jun. 30, 2025 | Dec. 31, 2024
Schedule of Prepayments and Other Assets, Net [Abstract] |  |
Beginning balance | $ 573 | $ 405
Provisions for credit losses for prepayments and other assets | 118 | 176
Exchange rate effect | 2 | (8)
Ending balance | $ 693 | $ 573

X
- Definition Represent the amount of exchange rate effect. + References No definition available. + Details
Name: | sfwl_AllowanceForDoubtfulOtherReceivablesExchangeRateEffect
Namespace Prefix: | sfwl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of (Recovery) provisions for prepayments and other assets. + References No definition available. + Details
Name: | sfwl_RecoveryProvisionsForPrepaymentsAndOtherAssets
Namespace Prefix: | sfwl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of allowance for credit loss on receivable, classified as other and current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_AllowanceForDoubtfulOtherReceivablesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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