Credit Facility, Cross Default Provision, Minimum Debt Principal Amount

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility Decrease In Maximum Borrowing Capacity

+ References

No definition available.

+ Details

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Namespace Prefix:	frgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line of Credit Facility, Incremental Increases

+ References

No definition available.

+ Details

Name:	frgi_LineOfCreditFacilityIncrementalIncreases
Namespace Prefix:	frgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the debt instrument was issued, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: 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(a))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=frgi_November2017SeniorCreditFacilityMember
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Balance Type:
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- Details

Name:	srt_RangeAxis=srt_MaximumMember
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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
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- Details

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- Details

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Balance Type:
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- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
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Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
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Long-term Debt - Senior Credit Facility (Details) - USD ($)	Nov. 23, 2020	Jul. 10, 2020	Nov. 30, 2017	Jan. 02, 2022	Apr. 04, 2021	Jan. 03, 2021	Jun. 28, 2020
Line of Credit Facility [Line Items]
Outstanding revolving credit borrowings				$ 0		$ 0
Revolving Credit
Line of Credit Facility [Line Items]
Remaining borrowing capacity				$ 10,000,000
Revolving Credit \| November 2017 Senior Credit Facility
Line of Credit Facility [Line Items]
Senior credit facility, issuance date			Nov. 30, 2017
Senior credit facility, maximum borrowing capacity			$ 150,000,000
Senior credit facility, maturity date			Nov. 30, 2022
Revolving Credit \| November 2017 Senior Credit Facility \| Maximum
Line of Credit Facility [Line Items]
Senior credit facility, potential incremental increase			$ 50,000,000
Commitment fee margin			0.35%
Revolving Credit \| November 2017 Senior Credit Facility \| Maximum \| Alternative Base Rate
Line of Credit Facility [Line Items]
Applicable margin			1.50%
Revolving Credit \| November 2017 Senior Credit Facility \| Maximum \| LIBOR
Line of Credit Facility [Line Items]
Applicable margin			2.50%
Revolving Credit \| November 2017 Senior Credit Facility \| Minimum
Line of Credit Facility [Line Items]
Commitment fee margin			0.25%
Revolving Credit \| November 2017 Senior Credit Facility \| Minimum \| Alternative Base Rate
Line of Credit Facility [Line Items]
Applicable margin			0.75%
Revolving Credit \| November 2017 Senior Credit Facility \| Minimum \| LIBOR
Line of Credit Facility [Line Items]
Applicable margin			1.75%
Revolving Credit \| November 2020 Senior Credit Facility
Line of Credit Facility [Line Items]
Commitment fee margin	0.50%
Cross default provision, minimum debt principal amount	$ 5,000,000
Revolving Credit \| November 2020 Senior Credit Facility \| Maximum
Line of Credit Facility [Line Items]
Senior credit facility, maximum borrowing capacity	$ 10,000,000
Revolving Credit \| July 2020 Senior Credit Facility [Member]
Line of Credit Facility [Line Items]
Senior credit facility, issuance date		Jul. 10, 2020
Senior credit facility, maximum borrowing capacity							$ 150,000,000
Senior credit facility, maturity date	Nov. 23, 2020	Nov. 30, 2022
Commitment fee margin		0.50%
Line Of Credit Facility Decrease In Maximum Borrowing Capacity		$ 30,000,000
Revolving Credit \| July 2020 Senior Credit Facility [Member] \| Forecast
Line of Credit Facility [Line Items]
Senior credit facility, maximum borrowing capacity					$ 95,000,000
Revolving Credit \| July 2020 Senior Credit Facility [Member] \| Alternative Base Rate
Line of Credit Facility [Line Items]
Applicable margin		4.00%
Revolving Credit \| July 2020 Senior Credit Facility [Member] \| LIBOR
Line of Credit Facility [Line Items]
Applicable margin		5.00%
Revolving Credit \| July 2020 Senior Credit Facility [Member] \| Minimum \| Alternative Base Rate
Line of Credit Facility [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.00%
Revolving Credit \| July 2020 Senior Credit Facility [Member] \| Minimum \| LIBOR
Line of Credit Facility [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.00%
Letters of Credit \| November 2017 Senior Credit Facility
Line of Credit Facility [Line Items]
Senior credit facility, maximum borrowing capacity			$ 15,000,000
Secured Debt \| November 2020 Senior Credit Facility
Line of Credit Facility [Line Items]
Senior credit facility, issuance date	Nov. 23, 2020
Senior credit facility, maturity date	Nov. 23, 2025
Senior credit facility, potential incremental increase	$ 37,500,000
Secured Debt \| November 2020 Senior Credit Facility \| Alternative Base Rate
Line of Credit Facility [Line Items]
Applicable margin	6.75%
Secured Debt \| November 2020 Senior Credit Facility \| LIBOR
Line of Credit Facility [Line Items]
Applicable margin	7.75%
Secured Debt \| November 2020 Senior Credit Facility \| Minimum \| Alternative Base Rate
Line of Credit Facility [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	2.00%
Secured Debt \| November 2020 Senior Credit Facility \| Minimum \| LIBOR
Line of Credit Facility [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.00%