Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 6,152	$ 22,808
Short-term investments	104,937	110,528
Prepaid expenses and other current assets	2,485	2,352
Total current assets	113,574	135,688
Operating lease asset, net	530	613
In-process research and development	32,386	32,386
Other assets	177	322
Total assets	146,667	169,009
Current liabilities:
Accounts payable	6,585	3,627
Current operating lease liabilities	369	358
Accrued expenses and other liabilities	6,504	14,359
Total current liabilities	13,458	18,344
Deferred tax liabilities	2,187	2,187
Non-current operating lease liabilities	186	283
Warrant liabilities	30,378	11,416
Total liabilities	46,209	32,230
Commitments and contingencies (Note 7)
Stockholders' equity:
Common stock, $0.001 par value, 300,000,000 shares authorized at March 31, 2026 and December 31, 2025; 75,851,722 and 75,430,033 shares issued and outstanding at March 31, 2026 and December 31, 2025, respectively	76	75
Additional paid-in capital	484,988	482,189
Accumulated other comprehensive income (loss)	(72)	24
Accumulated deficit	(440,228)	(401,203)
Total stockholders’ equity	44,764	81,085
Total liabilities, convertible preferred stock and stockholders' equity	146,667	169,009
Series X1 Non-voting Convertible Preferred Stock [Member]
Current liabilities:
Convertible preferred stock, value	53,543	53,543
Series X Non-Voting Convertible Preferred Stock [Member]
Current liabilities:
Convertible preferred stock, value	$ 2,151	$ 2,151

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).