XML 80 R56.htm IDEA: XBRL DOCUMENT
v3.21.2

Summary of Significant Accounting Policies (Details) - Schedule of changes in fair value of warrant liabilities - Spartacus Acquisition Corp [Member] | 9 Months Ended
--- | ---
Sep. 30, 2021 USD ($)
Private Placement [Member] |
Summary of Significant Accounting Policies (Details) - Schedule of changes in fair value of warrant liabilities [Line Items] |
Fair value as of Warrant liability, begining | $ 11,812,500
Initial measurement on October 19, 2020 | 4,200,000
Fair value as of Warrant liability, ending | 16,012,500
Public [Member] |
Summary of Significant Accounting Policies (Details) - Schedule of changes in fair value of warrant liabilities [Line Items] |
Fair value as of Warrant liability, begining | 11,200,000
Initial measurement on October 19, 2020 | 4,700,000
Fair value as of Warrant liability, ending | 15,900,000
Warrant Liabilities [Member] |
Summary of Significant Accounting Policies (Details) - Schedule of changes in fair value of warrant liabilities [Line Items] |
Fair value as of Warrant liability, begining | 23,012,500
Initial measurement on October 19, 2020 | 8,900,000
Fair value as of Warrant liability, ending | $ 31,912,500

X
- Definition Initial measurement. + References No definition available. + Details
Name: | nn_FairValueOfInitialMeasurement
Namespace Prefix: | nn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | nn_SummaryofSignificantAccountingPoliciesDetailsScheduleofchangesinfairvalueofwarrantliabilitiesLineItems
Namespace Prefix: | nn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 + Details
Name: | us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=nn_SpartacusAcquisitionCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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