XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.25.3

Fair Value Measurements - Schedule of fair value on a recurring basis (Details) - USD ($) | 3 Months Ended
--- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025
2024 February Institutional/Accredited Investor warrants |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | $ 91,712 | $ 73,670 | $ 291,566
Initial fair value | 0 | 0 | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | (91,092) | 18,042 | (217,896)
Balance at period end | 620 | 91,712 | 73,670
2024 October Institutional/Accredited Investor Warrants |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 6,974 | 27,056 | 292,234
Initial fair value | 0 |  | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | 7,015 | (20,082) | (265,178)
Balance at period end | 13,989 | 6,974 | 27,056
Senior Convertible Notes - October 2024 |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 152,909 | 508,137 | 2,475,162
Initial fair value | 0 |  | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | (123,909) | 617,017 | (3,058,031)
Total (gains) losses for period included in earnings | 4,623 | (972,245) | 1,091,006
Balance at period end | 33,623 | 152,909 | 508,137
Additional Investment Rights - October 2024 |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 10,333 | 682,667 | 5,950
Initial fair value | 0 |  | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | 100,774 | (672,334) | 676,717
Balance at period end | 111,107 | 10,333 | 682,667
2024 December Institutional/Accredited Investor Warrants |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 48,708 | 40,312 | 109,337
Initial fair value | 0 |  | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | (48,627) | 8,396 | (69,025)
Balance at period end | 81 | 48,708 | 40,312
2025 March Institutional/Accredited Investor Warrants |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 36,257 | 106,544 | 0
Initial fair value | 0 |  | 106,544
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | 17,330 | (70,287) | 0
Balance at period end | 53,587 | 36,257 | 106,544
Senior Convertible Notes - March 2025 |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 0 | 1,393,456 | 0
Initial fair value | 0 |  | 1,393,456
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | (1,393,456) | 0
Total (gains) losses for period included in earnings | 0 | 0 | 0
Balance at period end | 0 | 0 | 1,393,456
2025 April Institutional/Accredited Investor Warrants |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 31,683 | 0 | 0
Initial fair value | 0 | 31,683 | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | 8,955 | 0 | 0
Balance at period end | 40,638 | 31,683 | 0
2025 May Institutional/Accredited Investor Warrants |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 139,917 | 0 | 0
Initial fair value | 0 | 139,917 | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | 48,550 | 0 | 0
Balance at period end | 188,467 | 139,917 | 0
Senior Convertible Notes - May 2025 |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 2,135,181 | 0 | 0
Initial fair value | 0 | 2,135,181 | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | (1,071,806) | 0 | 0
Total (gains) losses for period included in earnings | (167,878) | 0 | 0
Balance at period end | 895,497 | 2,135,181 | 0
2025 September Institutional/Accredited Investor Warrants |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 0 | 0 | 0
Initial fair value | 965 | 0 | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | 0 | 0 | 0
Balance at period end | 965 | 0 | 0
Senior Convertible Notes - September 2025 |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at period start | 0 | 0 | 0
Initial fair value | 100,926 | 0 | 0
Exercise warrants | 0 |  |
Conversion of Convertible Notes | 0 | 0 | 0
Total (gains) losses for period included in earnings | 0 | 0 | 0
Balance at period end | $ 100,926 | $ 0 | $ 0

X
- Definition Fair Value Measurement With Unobservable Inputs Reconciliation Exercise Warrants + References No definition available. + Details
Name: | nvve_FairValueMeasurementWithUnobservableInputsReconciliationExerciseWarrants
Namespace Prefix: | nvve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis , Conversion Of Financial Instrument + References No definition available. + Details
Name: | nvve_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisConversionOfFinancialInstrument
Namespace Prefix: | nvve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2G -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2G Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_February2024WarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_October2024WarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_SeniorConvertibleNotesIssuedOnOctober312024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_October2024AdditionalInvestmentRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_December2024WarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_WarrantsIssuedOnMarch52025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_SeniorConvertibleNotesIssuedOnMarch312025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_April2025InstitutionalAccreditedInvestorWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_May2025InstitutionalAccreditedInvestorWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_SeniorConvertibleNotesIssuedOnMay302025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_September2025InstitutionalAccreditedInvestorWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nvve_SeniorConvertibleNotesIssuedOnSeptember302025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |