Exchange ratio of one Common Share per Right.

No definition available.

Name:	loco_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRightExchangeRatio
Namespace Prefix:	loco_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of sale of consolidated assets or Earning Power considered on flip over event.

+ References

No definition available.

+ Details

Name:	loco_PercentageOfConsolidatedAssetsEarningPowerSaleConsideredForFlipOverEvent
Namespace Prefix:	loco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of dividends rights for each common stock.

+ References

No definition available.

+ Details

Name:	loco_RightsAgreementDividendsPerCommonStock
Namespace Prefix:	loco_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Multiplier for the exercise price of the right will become exercisable for Common Shares.

+ References

No definition available.

+ Details

Name:	loco_RightsExercisableForCommonStockExercisePriceMultiplier
Namespace Prefix:	loco_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents redemption price of right.

+ References

No definition available.

+ Details

Name:	loco_RightsRedemptionPrice
Namespace Prefix:	loco_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of ownership of equity interest excluding interest in entity that is consolidated and equity method investee.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 321
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479536/321-10-50-1

+ Details

Name:	us-gaap_EquityOwnershipPercentageExcludingConsolidatedEntityAndEquityMethodInvestee
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=loco_PreferredSharePurchaseRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SHAREHOLDER RIGHTS AGREEMENT (Details) - $ / shares	Aug. 08, 2023	Dec. 27, 2023	Dec. 28, 2022
RIGHTS AGREEMENT
Common stock, par value (usd per share)		$ 0.01	$ 0.01
Preferred stock, par value (usd per share)		$ 0.01	$ 0.01
Preferred shares purchase right
RIGHTS AGREEMENT
Dividends declared	1
Common stock, par value (usd per share)	$ 0.01
Beneficial Ownership percentage	12.50%
Rights exchange ratio	1
Percentage of consolidated assets or Earning Power	50.00%
Rights exercisable multiplier	2
Redemption price (usd per share)	$ 0.001
Preferred shares purchase right \| Series A Preferred Stock
RIGHTS AGREEMENT
Shares called by purchase right	0.001
Preferred stock, par value (usd per share)	$ 0.01
Share price	$ 53.75