Annual insurance premium cover franchises.

No definition available.

Name:	bdl_AnnualInsurancePremiumCoverFranchises
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of excess insurance coverage provided by insurance carrier above general liabilty insurance coverage.

+ References

No definition available.

+ Details

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Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of insurance coverage per occurrence above self-insured deductible provided by insurance carrier.

+ References

No definition available.

+ Details

Name:	bdl_FullRiskExposureAmountPerOccurrenceInsuranceCarrierCoverage
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount at which the limited partnerships assumes the full risk of exposure per occurrence.

+ References

No definition available.

+ Details

Name:	bdl_FullRiskExposureAmountPerOccurrenceLimitedPartnerships
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum aggregate amount of insurance coverage per year.

+ References

No definition available.

+ Details

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Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The information pertaining to aggregate amount of insurance premium payable financed from third party lender.

+ References

No definition available.

+ Details

Name:	bdl_InsurancePremiumAggregateAmountFinancedFromThirdPartyLender
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The information pertaining to aggregate amount of insurance premium payable.

+ References

No definition available.

+ Details

Name:	bdl_InsurancePremiumAggregateAmountPayable
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Other property risk exposure amount per occurrence, limited partnerships.

+ References

No definition available.

+ Details

Name:	bdl_OtherPropertyRiskExposureAmountPerOccurrenceLimitedPartnerships
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Property risk coverage floor rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	bdl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Property risk exposure amount per occurrence, limited partnerships.

+ References

No definition available.

+ Details

Name:	bdl_PropertyRiskExposureAmountPerOccurrenceLimitedPartnerships
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase price of real property and improvements under lease amendment.

+ References

No definition available.

+ Details

Name:	bdl_PurchasePriceOfRealPropertyAndImprovementsUnderLeaseExtensionAgreement
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Targeted percentage increase from bar revenues.

+ References

No definition available.

+ Details

Name:	bdl_TargetedBarRevenuePercentageIncrease
Namespace Prefix:	bdl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Targeted percentage increase from menu revenues.

+ References

No definition available.

+ Details

Name:	bdl_TargetedMenuRevenuePercentageIncrease
Namespace Prefix:	bdl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The information pertaining to term of insurance premium payable.

+ References

No definition available.

+ Details

Name:	bdl_TermOfInsurancePremiumPayable
Namespace Prefix:	bdl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The excess of liability claim amount per occurrence and in the aggregate that the Company is un-insured.

+ References

No definition available.

+ Details

Name:	bdl_UninsuredAmountInExcessOfPerOccurrence
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bdl_FinancedInsurancePremiumsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_TypeOfInsurancePremiumFinancingAxis=bdl_GeneralLiabilityInsuranceExcludingLimitedPartnershipPremiumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_TypeOfInsurancePremiumFinancingAxis=bdl_GeneralLiabilityInsuranceForLimitedPartnershipPremiumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_TypeOfInsurancePremiumFinancingAxis=bdl_PropertyInsurancePremiumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_TypeOfInsurancePremiumFinancingAxis=bdl_ExcessLiabilityInsurancePremiumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_TypeOfInsurancePremiumFinancingAxis=bdl_TerroristInsurancePremiumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_TypeOfInsurancePremiumFinancingAxis=bdl_AutomobileInsurancePremiumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_TypeOfInsurancePremiumFinancingAxis=bdl_EquipmentBreakdownInsurancePremiumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bdl_PropertyNameAxis=bdl_NorthLauderdaleFloridaPropertyMember
Namespace Prefix:
Data Type:	na
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SUBSEQUENT EVENTS (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
SUBSEQUENT EVENTS (Details) - USD ($)	Dec. 30, 2020	Dec. 23, 2020	Oct. 03, 2020	Dec. 06, 2020	Nov. 29, 2020
Subsequent Event [Line Items]
Full risk exposure amount per occurrence, limited partnerships			$ 10,000
Full risk exposure amount per occurrence, insurance carrier coverage			1,000,000
Full risk exposure amount per occurrence, maximum aggregate from insurance carrier			2,000,000
Full risk exposure amount per occurrence, excess insurance carrier coverage			10,000,000
Uninsured amount in excess of per occurrence			$ 11,000,000
Financed Insurance Premiums [Member]
Subsequent Event [Line Items]
Interest rate (per annum)			3.85%
Payment frequency			Monthly
Monthly payment of principal and interest			$ 158,000
Financed Insurance Premiums [Member] \| General Liability Insurance Excluding Limited Partnership Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable			$ 418,000
Term of insurance premium			1 year
Financed Insurance Premiums [Member] \| General Liability Insurance for Limited Partnership Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable			$ 459,000
Term of insurance premium			1 year
Financed Insurance Premiums [Member] \| Property Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable			$ 561,000
Term of insurance premium			1 year
Financed Insurance Premiums [Member] \| Excess Liability Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable			$ 360,000
Term of insurance premium			1 year
Financed Insurance Premiums [Member] \| Terrorist Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable			$ 12,000
Term of insurance premium			1 year
Subsequent Event [Member]
Subsequent Event [Line Items]
Targeted percentage increase from bar revenues					1.83%
Targeted percentage increase from menu revenues				2.45%
Full risk exposure amount per occurrence, limited partnerships	$ 10,000
Full risk exposure amount per occurrence, insurance carrier coverage	1,000,000
Full risk exposure amount per occurrence, maximum aggregate from insurance carrier	2,000,000
Full risk exposure amount per occurrence, excess insurance carrier coverage	10,000,000
Uninsured amount in excess of per occurrence	11,000,000
Property risk exposure amount per occurrence, limited partnerships	100,000
Other property risk exposure amount per occurrence, limited partnerships	$ 10,000
Property risk coverage floor rate	5.00%
Subsequent Event [Member] \| Financed Insurance Premiums [Member]
Subsequent Event [Line Items]
Annual insurance premium cover franchises	$ 1,940,000
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| Unaffiliated Third Party [Member]
Subsequent Event [Line Items]
Amount of premium payable financed from third party lender	$ 1,776,000
Interest rate (per annum)	2.45%
Term of financing agreement	11 months
Payment frequency	Monthly
Monthly payment of principal and interest	$ 164,000
Subsequent Event [Member] \| Financed Insurance Premiums [Member]
Subsequent Event [Line Items]
Amount of premium payable financed from third party lender	1,940,000
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| General Liability Insurance Excluding Limited Partnership Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable	$ 340,000
Term of insurance premium	1 year
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| General Liability Insurance for Limited Partnership Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable	$ 426,000
Term of insurance premium	1 year
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| Automobile Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable	$ 93,000
Term of insurance premium	1 year
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| Property Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable	$ 627,000
Term of insurance premium	1 year
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| Excess Liability Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable	$ 443,000
Term of insurance premium	1 year
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| Terrorist Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable	$ 5,000
Term of insurance premium	1 year
Subsequent Event [Member] \| Financed Insurance Premiums [Member] \| Equipment Breakdown Insurance Premium [Member]
Subsequent Event [Line Items]
Amount of premium payable	$ 6,000
Term of insurance premium	1 year
Subsequent Event [Member] \| North Lauderdale, Florida [Member]
Subsequent Event [Line Items]
Lease expiration date		Dec. 31, 2020
Purchase price of real property and improvements under lease amendment		$ 1,200,000