Consolidated Balance Sheets - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 4,612,000	$ 56,409,000
Short-term investments	46,490,000	0
Prepaid expenses and other current assets	5,027,000	3,109,000
Total current assets	56,129,000	59,518,000
Operating lease asset, net	365,000	739,000
In-process research and development	32,386,000	32,386,000
Other assets	186,000	150,000
Total assets	89,066,000	92,793,000
Current liabilities:
Accounts payable	967,000	2,200,000
Current operating lease liability	383,000	363,000
Accrued expenses and other liabilities	2,545,000	3,912,000
Total current liabilities	3,895,000	6,475,000
Deferred tax liability	1,752,000	1,752,000
Non-current operating lease liability	0	383,000
Total liabilities	5,647,000	8,610,000
Commitments and contingencies (Note 8)
Stockholders’ equity:
Common stock, $0.001 par value, 200,000,000 shares authorized at December 31, 2023 and 2022; 24,213,130 and 13,776,788 shares issued and outstanding at December 31, 2023 and 2022, respectively	24,000	14,000
Additional paid-in capital	326,586,000	287,034,000
Accumulated deficit	(243,191,000)	(202,865,000)
Total stockholders’ equity	83,419,000	84,183,000
Total liabilities and stockholders’ equity	89,066,000	92,793,000
Series X1 Non-voting Convertible Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, value
Series X Non-voting Convertible Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, value

In-process research and development.

No definition available.

Name:	eldn_InProcessResearchAndDevelopment
Namespace Prefix:	eldn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).