Name:	sfwl_AggregateCreditLine
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Balance Type:	credit
Period Type:	duration

The amount of amount received.

No definition available.

Name:	sfwl_AmountReceived
Namespace Prefix:	sfwl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Percentage of annual revenue percentage.

No definition available.

Name:	sfwl_AnnualRevenuePercentage
Namespace Prefix:	sfwl_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

Facility expenses incurred related to gas and oil produced and sold during the reporting period.

No definition available.

Name:	sfwl_FacilityCost
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of financing exposure balance.

No definition available.

Name:	sfwl_FinancingExposureBalance
Namespace Prefix:	sfwl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of loan agreement.

No definition available.

Name:	sfwl_LoanAmount
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Balance Type:	debit
Period Type:	instant

The repaid amount to bank.

No definition available.

Name:	sfwl_RepaidAmountToBank
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Balance Type:	credit
Period Type:	instant

- References

No definition available.

Name:	sfwl_ShortTermBankLoansDetailsLineItems
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The amount of short- term loan note receivable.

No definition available.

Name:	sfwl_ShortTermLoanReceivable
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Short-term facility agreement, Description.

No definition available.

Name:	sfwl_ShorttermFacilityAgreementDescription
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The maximum amount of borrowing capacity under a line of credit that is available.

No definition available.

Name:	sfwl_TotalLoanFacilityAvailable
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The withdrawal is an amount of money that taken from your bank loan.

No definition available.

Name:	sfwl_WithdrawnOfLoan
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Period Type:	instant

Amount of short-term bank loan secured by broker-dealer customer's security.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

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Period Type:	instant

Amount of debt and lease obligation, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Name:	us-gaap_DebtCurrent
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Period Type:	instant

Amount of outstanding short-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of assets pledged to secure a debt instrument.

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-URI https://asc.fasb.org//1943274/2147480848/942-470-50-3

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Description of a fee associated with the debt instrument, including a commitment fee on unborrowed portions of a lender's total contractual commitment.

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Name:	us-gaap_DebtInstrumentFee
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Average fixed interest rate related to the group of interest rate derivatives.

No definition available.

Name:	us-gaap_DerivativeAverageFixedInterestRate
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Facility expenses incurred related to gas and oil produced and sold during the reporting period.

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Period Type:	duration

Amount of undisbursed portion of financing receivable balance. Excludes financing receivable covered under loss sharing agreement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
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-Section 50
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Balance Type:	credit
Period Type:	instant

The aggregate interest expense incurred on short-term borrowings including commercial paper and Federal funds purchased and securities sold under agreements to repurchase.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
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-Paragraph (a)
-Publisher SEC

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1402
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-Subparagraph (1)
-Publisher SEC

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Amount of long-term notes classified as other, payable within one year or the normal operating cycle, if longer.

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-Topic 210
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-Subparagraph (SX 210.5-02.20)
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-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure.

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The cash outflow for acquisition of land for use; excludes purchases of land held as inventory or as investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets.

No definition available.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
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-Publisher FASB
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Cash received from principal payments made on loans related to operating activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 230
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-Section 45
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Name:	us-gaap_ProceedsFromLoans
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of real estate investments, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; (7) other real estate investments; (8) real estate joint ventures; and (9) unconsolidated real estate and other joint ventures not separately presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section S99
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Name:	us-gaap_RealEstateInvestments
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Period Type:	instant

The cash outflow to settle a bank borrowing during the year.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 15
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-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

Name:	us-gaap_RepaymentsOfBankDebt
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Balance Type:	credit
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The cash outflow from repayment of borrowings to finance the cost of construction.

Name:	us-gaap_RepaymentsOfConstructionLoansPayable
Namespace Prefix:	us-gaap_
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Balance Type:	credit
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Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer.

Name:	us-gaap_RepaymentsOfOtherLongTermDebt
Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	duration

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481372/852-10-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

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-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Name:	us-gaap_ShortTermBorrowings
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The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate.

No definition available.

Name:	us-gaap_ShortTermDebtPercentageBearingFixedInterestRate
Namespace Prefix:	us-gaap_
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The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date, which accrues interest at a rate subject to change from time to time.

No definition available.

Name:	us-gaap_ShortTermDebtPercentageBearingVariableInterestRate
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Period Type:	instant

Weighted average interest rate of short-term debt outstanding calculated at point in time.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
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-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Name:	us-gaap_ShortTermDebtWeightedAverageInterestRate
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Data Type:	dtr-types:percentItemType
Balance Type:	na
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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph (a)
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Section 1402
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-Publisher SEC

Name:	us-gaap_ShorttermDebtAverageOutstandingAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	us-gaap_LineOfCreditFacilityAxis=sfwl_ChinaMinshengBankFuzhouBranchMember
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Name:	us-gaap_LineOfCreditFacilityAxis=sfwl_BankOfChinaFuzhouJinanBranchMember
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Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
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Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_LineOfCreditFacilityAxis=sfwl_ChinaMerchantBankFuzhouBranchMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_LineOfCreditFacilityAxis=sfwl_XiamenInternationalBankCoLtdFuzhouBranchMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
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Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
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