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Schedule of Future Lease Payments from Sublease Agreement (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Leases
2025	$ 88
2026	75
Total payments	$ 163

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- References

No definition available.

+ Details

Name:	ERNA_DisclosureLeasesAbstract
Namespace Prefix:	ERNA_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Sale leaseback transactions future minimum sublease rentals.

+ References

No definition available.

+ Details

Name:	ERNA_SaleLeasebackTransactionsFutureMinimumSubleaseRentals
Namespace Prefix:	ERNA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Sale leaseback transactions future minimum sublease rentals next twelve months.

+ References

No definition available.

+ Details

Name:	ERNA_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsNextTwelveMonths
Namespace Prefix:	ERNA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Sale leaseback transactions future minimum sublease rentals within two years.

+ References

No definition available.

+ Details

Name:	ERNA_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsWithinTwoYears
Namespace Prefix:	ERNA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant