XML 45 R24.htm IDEA: XBRL DOCUMENT
v3.22.1

Stockholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Common Stock Warrants [Member] |
Class Of Stock [Line Items] |
Schedule of Warrants to Purchase Common Stock Activity | The following table shows the warrants to purchase common stock activity:
|  | Rollforward of Warrant Activity |
|  | Registered direct warrants, placement agent |  |  | Private placement warrants |  |  | Private placement warrants, placement agent |  |  | Warrants exchanged for common stock |  |  | Warrants exchanged for Series X1 preferred stock |  |  | Total |
Balance as of December 31, 2020 |  |  | 9,581 |  |  |  | 319,064 |  |  |  | 9,177 |  |  |  | — |  |  |  | — |  |  |  | 337,822 |
Issued |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 509,117 |  |  |  | 298,692 |  |  |  | 807,809 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Cancelled/Expired |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Balance as of December 31, 2021 |  |  | 9,581 |  |  |  | 319,064 |  |  |  | 9,177 |  |  |  | 509,117 |  |  |  | 298,692 |  |  |  | 1,145,631 |
Preferred Stock Warrants [Member] |
Class Of Stock [Line Items] |
Schedule of Warrants to Purchase Common Stock Activity | The following table shows the warrants to purchase Series X1 Convertible Preferred Stock activity:
| Rollforward of Series X1 Convertible Preferred Warrant Activity |
|  | Warrants assumed and replaced in acquisition |  |  | Total |
Balance as of December 31, 2020 |  |  | 55,583.875 |  |  |  | 55,583.875 |
Assumed and replaced |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |
Cancelled/Expired |  |  | (5,376.456 | ) |  |  | (5,376.456 | )
Balance as of December 31, 2021 |  |  | 50,207.419 |  |  |  | 50,207.419 |

X
- Definition Schedule of warrant activity. + References No definition available. + Details
Name: | eldn_ScheduleOfWarrantActivityTableTextBlock
Namespace Prefix: | eldn_
Data Type: | dtr-types:textBlockItemType
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
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=eldn_CommonStockWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=eldn_PreferredStockWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |