XML 50 R39.htm IDEA: XBRL DOCUMENT
v3.23.1

RELATED PARTY TRANSACTIONS (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Feb. 20, 2023 | Feb. 20, 2023 USD ($) | Sep. 30, 2022 USD ($) Installment | Mar. 31, 2023 | Sep. 09, 2022 USD ($)
Related Party Transaction [Abstract] |  |  |  |  |
Notice period for first termination of contract | 120 days |  |  |  |
License agreement automatic renewal term | 2 years 6 months |  |  |  |
Percentage of Sublicense Fees Paid Before License Expiration Date | 20.00% | 20.00% |  |  |
Percentage of Sublicense Fees Received During Renewal Term | 30.00% | 30.00% |  |  |
Minimum [Member] |  |  |  |  |
Related Party Transaction [Abstract] |  |  |  |  |
Sublicense Fees |  | $ 100.0 |  |  |
Factor Bioscience Inc. [Member] |  |  |  |  |
Related Party Transaction [Abstract] |  |  |  |  |
Master services agreement, initial fees payable |  |  | $ 5.0 |  |
Number of monthly installments for fees payable | Installment |  |  | 12 |  |
Monthly installment fees amount |  |  | $ 0.4 |  |
Monthly master services agreement fees payable initial 12-month |  |  | 5.0 |  |
Initial license fees obligation |  |  | 3.5 |  |
Deposit paid to be applied to last month of first work order |  |  |  |  | $ 0.4
Notice period for first termination of contract |  |  |  | 120 days |
Notice period for superseding termination provisions |  |  |  | 30 days |
Agreed waive payment |  |  | 3.5 |  |
Remaining license fee obligation |  |  | $ 2.5 |  |

X
- Definition The amount agreed to waive payment as per waiver agreement. + References No definition available. + Details
Name: | erna_AgreedWaivePayment
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of deposit paid which will be applied to the last month of the first work order. + References No definition available. + Details
Name: | erna_DepositPaidToBeAppliedToLastMonthOfFirstWorkOrder
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of initial license fees required to pay including non-refundable fee. + References No definition available. + Details
Name: | erna_InitialLicenseFeeObligation
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The automatic renewal term of license agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | erna_LicenseAgreementAutomaticRenewalTerm
Namespace Prefix: | erna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount agreed to pay an initial fee under Master Services Agreement (or "MSA"). + References No definition available. + Details
Name: | erna_MasterServiceAgreementInitialFeesPayable
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The monthly master service agreement ("MSA") fees payable to related party. + References No definition available. + Details
Name: | erna_MonthlyMasterServicesAgreementFeesPayable
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The Company may terminate the first work under the MSA on or after the second anniversary of the date of the MSA, subject to providing Factor with prior notice, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | erna_NoticePeriodForFirstTerminationOfContract
Namespace Prefix: | erna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The Master Services Agreement (or "MSA") contains customary confidentiality provisions and representations and warranties of the parties, and the Master Services Agreement (or "MSA") may be terminated by ether party prior notice, subject to any superseding termination provisions contained in a particular work order, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | erna_NoticePeriodForSupersedingTerminationProvisions
Namespace Prefix: | erna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equal monthly installments for initial fees payable. + References No definition available. + Details
Name: | erna_NumberOfMonthlyInstallmentsForFeesPayable
Namespace Prefix: | erna_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Company will pay to Factor of sublicense fees paid before license expiration date. + References No definition available. + Details
Name: | erna_PercentageOfSublicenseFeesPaidBeforeLicenseExpirationDate
Namespace Prefix: | erna_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Company will receive remaining 30% sublicense fees during renewal term. + References No definition available. + Details
Name: | erna_PercentageOfSublienceFeesReceivedDuringRenewalTerm
Namespace Prefix: | erna_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of required periodic fees payment. + References No definition available. + Details
Name: | erna_RelatedPartyTransactionPeriodicFeesPaymentAmount
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of remaining license fee obligation. + References No definition available. + Details
Name: | erna_RemainingLicenseFeeObligation
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sublicense fees required to pay including non-refundable fee. + References No definition available. + Details
Name: | erna_SublicenseFees
Namespace Prefix: | erna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionDueFromToRelatedPartyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=erna_FactorBioscienceIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |