XML 64 R50.htm IDEA: XBRL DOCUMENT v3.22.2.2

COMMITMENTS AND CONTINGENCIES, Licensing Agreements (Details) - USD ($) $ in Millions				9 Months Ended
	Apr. 30, 2021	Apr. 15, 2021	Apr. 13, 2021	Sep. 30, 2022	Oct. 31, 2022	Oct. 31, 2021	Apr. 26, 2021
Novellus, Ltd. [Member] | Maximum [Member]
Licensing Agreements [Abstract]
Milestone payments				$ 51.0
Licensors [Member]
Licensing Agreements [Abstract]
Non-refundable option fee			$ 0.5
Initial license fees	$ 4.0
Amount require to pay of initial license fees		$ 1.0
Amount obligated to pay in license agreement							$ 4.0
Additional fees obligated to pay in 2021						$ 2.5
Licensors [Member] | Forecast [Member]
Licensing Agreements [Abstract]
Additional fees obligated to pay in 2022					$ 3.5
NoveCite [Member]
Licensing Agreements [Abstract]
Percentage of revenue				50.00%
University of South Florida [Member]
Licensing Agreements [Abstract]
Percentage of royalty payable				7.00%

X

- Definition

The entity is obligated to pay additional fees to Licensors.

+ References

No definition available.

+ Details

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

X

- Definition

The entity is obligated to pay additional fees to the Licensors in first year.

+ References

No definition available.

+ Details

Name:	erna_AmountObligatedToPayInYearOne
Namespace Prefix:	erna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The entity is obligated to pay additional fees to the Licensors in second year.

+ References

No definition available.

+ Details

Name:	erna_AmountObligatedToPayInYearTwo
Namespace Prefix:	erna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount require to pay out of the total initial license fees.

+ References

No definition available.

+ Details

Name:	erna_AmountRequireToPayInitialLicenseFees
Namespace Prefix:	erna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Initial license fees required to pay including non-refundable fee.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

The amount of Non-refundable option fee in licensing agreement.

+ References

No definition available.

+ Details

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

X

- Definition

Percentage of royalty payable from one party to another in licensing agreement.

+ References

No definition available.

+ Details

Name:	erna_LossContingencyPercentageOfRoyaltyPayable
Namespace Prefix:	erna_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of milestones upfront payment on licenses.

+ References

No definition available.

+ Details

Name:	erna_MilestonePayments
Namespace Prefix:	erna_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Percentage of revenue from receives any revenue involving the original cell line included in the licensed technology, then Novellus, Ltd shall remit to NoveCite.

+ References

No definition available.

+ Details

Name:	erna_PercentageOfRevenue
Namespace Prefix:	erna_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=erna_NovellusTherapeuticsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=erna_NovellusLtdAndFactorBioscienceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=erna_NoveCiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=erna_UniversityOfSouthFloridaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: