Debentures (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2025	Dec. 31, 2024
Loans and Financing [Abstract]
Revenue percentage	20.00%
Exposure premium	$ 2.9	$ 2.9

The amount by which credit derivatives or similar instruments related to loans or receivables mitigate maximum exposure to credit risk.

No definition available.

Name:	nvniw_AmountByWhichCreditDerivativesOrSimilarInstrumentsRelatedToLoansOrReceivablesMitigateMaximumExposureToCreditRisk
Namespace Prefix:	nvniw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant