Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 6,803	$ 22,808
Short-term investments	81,953	110,528
Prepaid expenses and other current assets	4,335	2,352
Total current assets	93,091	135,688
Operating lease asset, net	445	613
In-process research and development	32,386	32,386
Other assets	172	322
Total assets	126,094	169,009
Current liabilities:
Accounts payable	3,214	3,627
Current operating lease liabilities	381	358
Accrued expenses and other liabilities	8,194	14,359
Total current liabilities	11,789	18,344
Deferred tax liabilities	2,187	2,187
Non-current operating lease liabilities	86	283
Warrant liabilities	40,001	11,416
Total liabilities	54,063	32,230
Commitments and contingencies (Note 7)
Stockholders' equity:
Common stock, $0.001 par value, 450,000,000 shares authorized at June 30, 2026 and 300,000,000 shares authorized at December 31, 2025; 80,891,404 and 75,430,033 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively	81	75
Additional paid-in capital	504,904	482,189
Accumulated other comprehensive income (loss)	(114)	24
Accumulated deficit	(471,858)	(401,203)
Total stockholders’ equity	33,013	81,085
Total liabilities, convertible preferred stock and stockholders' equity	126,094	169,009
Series X1 Non-voting Convertible Preferred Stock [Member]
Current liabilities:
Convertible preferred stock, value	36,867	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).