XML 69 R54.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Schedule of Operating Lease Right-of-use Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Leases |  |
Operating lease ROU assets, Beginning | $ 32,781 |
Adjustment to ROU asset for remeasurement of Somerville Sublease liability | 4,245 |
Write-off Sublease lease ROU assets | (34,857) |
Amortization of operating lease ROU assets | (1,499) | $ (1,039)
Operating lease ROU assets, Ending | 670 | 32,781
Operating lease liabilities, Beginning | 35,070 |
Adjustment to lease liablity due to remeasurement of Somerville Sublease | 4,245 |
Accretion of interest for Somerville Sublease | 2,465 |
Write-off Sublease liability | (36,924) |
Principal payments on operating lease liabilities | (4,172) |
Operating lease liabilities, Ending | 684 | 35,070
Less non-current portion | 477 | 32,854
Current portion | $ 207 | $ 2,216

X
- Definition Accretion of interest sublease. + References No definition available. + Details
Name: | ERNA_AccretionOfInterestSublease
Namespace Prefix: | ERNA_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Adjustment to lease liability due to remeasurement of sublease. + References No definition available. + Details
Name: | ERNA_AdjustmentToLeaseLiabilityDueToRemeasurementOfSublease
Namespace Prefix: | ERNA_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Adjustment to remeasurement of operating lease ROU assets. + References No definition available. + Details
Name: | ERNA_AdjustmentToRemeasurementOfOperatingLeaseROUAssets
Namespace Prefix: | ERNA_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Operating lease right of use asset write off. + References No definition available. + Details
Name: | ERNA_OperatingLeaseRightOfUseAssetWriteOff
Namespace Prefix: | ERNA_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Write-off Sublease liability. + References No definition available. + Details
Name: | ERNA_OperatingLeasetWriteOff
Namespace Prefix: | ERNA_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Principal payments on operating lease liabilities. + References No definition available. + Details
Name: | ERNA_PrincipalPaymentsOnOperatingLeaseLiabilities
Namespace Prefix: | ERNA_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_OperatingLeaseLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of periodic reduction over lease term of carrying amount of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration