No definition available.

Name:	eldn_DescriptionOfBusinessLineItems
Namespace Prefix:	eldn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Percentage of common stockholders receive cash and other assets.

No definition available.

Name:	eldn_PercentageOfCommonStockholdersReceiveCashAndOtherAssets
Namespace Prefix:	eldn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Date when acquirer obtains control of acquiree in business combination, in YYYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
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-Topic 805
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-URI https://asc.fasb.org/1943274/2147479405/805-10-25-6

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

Face amount or stated value per share of common stock.

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

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

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

Reference 2: 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

Eledon Pharmaceuticals, Inc. 10-K/A