Accounts Receivable and Note Receivable - Factoring Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Receivables [Abstract]
Receivables Sold under Factoring Agreement	$ 16,400	$ 13,300
Receivables Sold under Factoring Agreement, Program Capacities	$ 21,100	$ 18,600

Receivables Sold under Factoring Agreement, Program Capacities

No definition available.

Name:	nvri_ReceivablesSoldUnderFactoringAgreementProgramCapacities
Namespace Prefix:	nvri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration