Related Party Transactions - Key Management Personnel Transactions (Details) - AUD ($) $ in Thousands	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Key management personnel transactions [Abstract]
Amount of compensation to key management personnel	$ 0	$ 0	$ 0

Amount of compensation to key management personnel

No definition available.

Name:	elvr_AmountOfCompensationToKeyManagementPersonnel
Namespace Prefix:	elvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration