Name:	nuvr_GovernmentAssistancePercentageOfTotalCostOfBuildingFiberConnectionsMatchedByCompany
Namespace Prefix:	nuvr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The percentage of total cost to build fiber connections awarded from government assistance.

No definition available.

Name:	nuvr_GovernmentAssistancePercentageOfTotalCostToBuildFiberConnectionsAwarded
Namespace Prefix:	nuvr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Value of total project costs.

No definition available.

Name:	nuvr_TotalProjectCosts
Namespace Prefix:	nuvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of receivables that are derived from government contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 912
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478345/912-310-45-1

Name:	us-gaap_GovernmentContractReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of progress payment offset against unbilled government contract receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-SubTopic 310
-Topic 912
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478685/912-310-50-3

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

Name:	us-gaap_GovernmentAssistanceTypeAxis=nuvr_MinnesotaDEEDLowDensityBroadbandGrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_GovernmentAssistanceTypeAxis=nuvr_December2022DEEDBroadbandGrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: