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Stockholders' Equity - Schedule of Warrants to Purchase Common Stock Activity (Detail) - Common Stock Warrants [Member] | 12 Months Ended
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Dec. 31, 2024 shares
Class Of Warrant Or Right [Line Items] |
Beginning Balance | 21,564,302
Issued | 12,921,023
Exercised | (1,423,000)
Cancelled/Expired | (9,581)
Ending Balance | 33,052,744
Common Warrants [Member] |
Class Of Warrant Or Right [Line Items] |
Beginning Balance | 15,788,032
Issued | 0
Exercised | 0
Cancelled/Expired | (9,581)
Ending Balance | 15,778,451
Pre-Funded Warrants [Member] |
Class Of Warrant Or Right [Line Items] |
Beginning Balance | 5,776,270
Issued | 12,921,023
Exercised | (1,423,000)
Cancelled/Expired | 0
Ending Balance | 17,274,293

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_
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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_
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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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X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
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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: |

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