XML 140 R52.htm IDEA: XBRL DOCUMENT v3.25.2

Schedule of fair valuation monte carlo model (Details) € / shares in Units, $ / shares in Units, $ in Thousands, € in Millions	Jun. 30, 2025 USD ($) $ / shares	Jun. 04, 2025	Mar. 19, 2025 USD ($) Simulations $ / shares	Jun. 30, 2025 € / shares	Mar. 19, 2025 EUR (€) € / shares
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Probability		6.00%	4.00%
PV	$ 8,873		$ 8,165
Investment round [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Event date	Jun. 30, 2026		Mar. 31, 2026
Probability	2.50%		2.50%
Average bond balance	$ 9,495		$ 8,678
Average payoff balance	$ 10,205		$ 9,321
Discount rate	6.80%		7.30%
PV factor | € / shares				€ 0.9359	€ 0.9299
PV	$ 239		$ 217
Change of Control [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Event date	Dec. 31, 2027		Dec. 31, 2027
Probability	5.00%		5.00%
Average bond balance	$ 10,301		$ 9,548
Average payoff balance	$ 10,340		$ 9,776
Discount rate	6.80%		7.30%
PV factor | € / shares				0.8472	0.8221
PV	$ 438		$ 402
Maturity [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Event date	Mar. 19, 2028		Mar. 19, 2028
Probability	90.00%		90.00%
Average bond balance	$ 10,417		$ 9,656
Average payoff balance	$ 10,863		$ 10,317
Discount rate	6.80%		7.30%
PV factor | € / shares				0.8352	0.8098
PV	$ 8,166		$ 7,519
Dissolution [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Event date	Dec. 31, 2026		Sep. 30, 2026
Probability	2.50%		2.50%
Average bond balance	$ 9,765		$ 8,927
Average payoff balance	$ 1,321		$ 1,225
Discount rate	6.80%		7.30%
PV factor | € / shares				€ 0.9052	€ 0.8977
PV	$ 30		$ 27
Mandatory Convertible Bond [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Effective date			Mar. 19, 2025
Event date			Mar. 19, 2028
Nominal value			$ 8,165		€ 7.5
Risk-free rate			4.00%	3.70%	4.00%
Instrument term	2 years 8 months 12 days		3 years
Stock volatility	8200.00%		83.00%
GNTA share price | $ / shares	$ 3.05		$ 3.82
Instrument term			3 years
Number of simulations | Simulations			20,000
Implied yield			7.30%	6.80%	7.30%
Probability			6.00%
Mandatory Convertible Bond [Member] | Measurement Input, Option Volatility [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Instrument term			3 years
Mandatory Convertible Bond [Member] | Interest Rate Risk [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Instrument term			3 years

X

- Definition

Average bond balance amount.

+ References

No definition available.

+ Details

Name:	GNTA_AverageBondBalanceAmount
Namespace Prefix:	GNTA_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Average payoff amount.

+ References

No definition available.

+ Details

Name:	GNTA_AveragePayoffAmount
Namespace Prefix:	GNTA_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Bond adjusted implied yield percentage.

+ References

No definition available.

+ Details

Name:	GNTA_BondAdjustedImpliedYieldPercentage
Namespace Prefix:	GNTA_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Bond equity volatility percentage.

+ References

No definition available.

+ Details

Name:	GNTA_BondEquityVolatilityPercentage
Namespace Prefix:	GNTA_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Bond present value factor amount.

+ References

No definition available.

+ Details

Name:	GNTA_BondPresentValueFactorAmount
Namespace Prefix:	GNTA_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Bond present value factor price per share.

+ References

No definition available.

+ Details

Name:	GNTA_BondPresentValueFactorPricePerShare
Namespace Prefix:	GNTA_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt instrument discount percentage.

+ References

No definition available.

+ Details

Name:	GNTA_DebtInstrumentDiscountPercentage
Namespace Prefix:	GNTA_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt instrument effective date.

+ References

No definition available.

+ Details

Name:	GNTA_DebtInstrumentEffectiveDate
Namespace Prefix:	GNTA_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Instrument term

+ References

No definition available.

+ Details

Name:	GNTA_InstrumentTerm
Namespace Prefix:	GNTA_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of simulations.

+ References

No definition available.

+ Details

Name:	GNTA_NumberOfSimulations
Namespace Prefix:	GNTA_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Price of the entity's common stock which would be required to be attained for the conversion feature embedded in the debt instrument to become effective.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentConvertibleStockPriceTrigger
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482949/835-30-55-8

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

+ Details

Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482949/835-30-55-8

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-6

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_DebtSecuritiesHeldtomaturityAllowanceForCreditLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=GNTA_MandatoryConvertibleBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputOptionVolatilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRiskAxis=us-gaap_InterestRateRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: