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v3.23.2

Stockholders' Equity - Schedule of Warrant Activity (Detail) | 6 Months Ended
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Jun. 30, 2023 shares
Class Of Warrant Or Right [Line Items] |
Ending Balance | 22,718,499
Private Placement Warrants [Member] |
Class Of Warrant Or Right [Line Items] |
Ending Balance | 15,489,340
Pre-funded Warrants [Member] |
Class Of Warrant Or Right [Line Items] |
Ending Balance | 6,930,467
Warrants Exchanged for Series X1 Preferred Stock [Member] |
Class Of Warrant Or Right [Line Items] |
Ending Balance | 298,692
Common Stock Warrants [Member] |
Class Of Warrant Or Right [Line Items] |
Beginning Balance | 1,145,631
Issued | 21,572,868
Exercised | 0
Cancelled/Expired | 0
Common Stock Warrants [Member] | Private Placement Warrants [Member] |
Class Of Warrant Or Right [Line Items] |
Beginning Balance | 337,822
Issued | 15,151,518
Exercised | 0
Cancelled/Expired | 0
Common Stock Warrants [Member] | Pre-funded Warrants [Member] |
Class Of Warrant Or Right [Line Items] |
Beginning Balance | 509,117
Issued | 6,421,350
Exercised | 0
Cancelled/Expired | 0
Common Stock Warrants [Member] | Warrants Exchanged for Series X1 Preferred Stock [Member] |
Class Of Warrant Or Right [Line Items] |
Beginning Balance | 298,692
Issued | 0
Exercised | 0
Cancelled/Expired | 0

X
- Definition Class of warrant or right number of warrants or rights cancelled or expired. + References No definition available. + Details
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Namespace Prefix: | eldn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of warrant or right number of warrants exercised. + References No definition available. + Details
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Namespace Prefix: | eldn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of warrant or right number of warrants or rights issued. + References No definition available. + Details
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Namespace Prefix: | eldn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- 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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |