XML 83 R64.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] | 4 Months Ended
--- | ---
Dec. 31, 2020 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 August 20, 2020 |
Initial measurement on October 19, 2020 | 9,537,500
Change in valuation inputs or other assumptions | 2,275,000
Fair value as of December 31, 2020 | 11,812,500
Public [Member] |
Summary of Significant Accounting Policies (Details) - Schedule of changes in fair value of warrant liabilities [Line Items] |
Fair value as of August 20, 2020 |
Initial measurement on October 19, 2020 | 10,500,000
Change in valuation inputs or other assumptions | 700,000
Fair value as of December 31, 2020 | 11,200,000
Warrant Liabilities [Member] |
Summary of Significant Accounting Policies (Details) - Schedule of changes in fair value of warrant liabilities [Line Items] |
Fair value as of August 20, 2020 |
Initial measurement on October 19, 2020 | 20,037,500
Change in valuation inputs or other assumptions | 2,975,000
Fair value as of December 31, 2020 | $ 23,012,500

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 asset after deduction of liability. + References No definition available. + Details
Name: | us-gaap_FairValueNetAssetLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the contract to service financial assets under which the estimated future revenues from contractually specified servicing fees, late charges, and other ancillary revenues are not expected to adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(4)(i) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746 + Details
Name: | us-gaap_ServicingLiabilityAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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: |