XML 107 R83.htm IDEA: XBRL DOCUMENT v3.23.1

Subsequent Event (Details) $ in Thousands	Feb. 21, 2023 USD ($)
Subsequent Event [Member]
Cell Customization and License Agreement [Abstract]
Proceeds from option and license agreement	$ 250,000

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- References

No definition available.

+ Details

Name:	erna_LicenseAgreementAbstract
Namespace Prefix:	erna_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The cash inflow from exclusive option and license agreement as a non-refundable up-front payment.

+ References

No definition available.

+ Details

Name:	erna_ProceedsFromOptionAndLicenseAgreement
Namespace Prefix:	erna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: