XML 27 R3.htm IDEA: XBRL DOCUMENT
v3.21.2

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Property and equipment, net of accumulated depreciation (in Dollars) | $ 2,075 | $ 1,262 |
Spartacus Acquisition Shelf Corp. |  |  |
Common stock par value (in Dollars per share) | $ 0.0001 |  |
Common stock, shares authorized | 100 |  |
Common stock, shares issued | 0 |  |
Common stock, shares outstanding | 0 |  |
Spartacus Acquisition Corp |  |  |
Preferred stock par value (in Dollars per share) | $ 0.0001 | $ 0.0001 |
Preference shares, shares authorized | 1,000,000 | 1,000,000 |
Preference shares, shares issued |  |  |
Preference shares, shares outstanding |  |  |
Class A Common Stock | Spartacus Acquisition Corp |  |  |
Common stock par value (in Dollars per share) | $ 0.0001 | $ 0.0001 |
Common stock, shares authorized | 200,000,000 | 200,000,000 |
Common stock, shares issued | 0 | 3,340,686 |
Common stock, shares outstanding | 0 | 3,340,686 |
Common stock subject to possible redemption, shares at redemption value | 20,000,000 | 20,000,000 |
Class B Common Stock | Spartacus Acquisition Corp |  |  |
Common stock par value (in Dollars per share) | $ 0.0001 | $ 0.0001 |
Common stock, shares authorized | 20,000,000 | 20,000,000 |
Common stock, shares issued | 5,000,000 | 5,000,000 |
Common stock, shares outstanding | 5,000,000 | 5,000,000 |
Class C Convertible Preferred Units |  |  |
Preference shares, shares authorized | 13,400,000 | 13,400,000 | 13,400,000
Preference shares, shares issued | 13,361,628 | 13,361,628 | 13,361,628
Preference shares, shares outstanding | 13,361,628 | 13,361,628 | 13,361,628
Liquidation preference value (in Dollars) | $ 11,879,116 | $ 11,879,116 | $ 11,359,921
Class D Convertible Preferred Units |  |  |
Preference shares, shares authorized | 94,550,000 | 94,550,000 | 94,550,000
Preference shares, shares issued | 71,338,498 | 71,338,498 | 71,338,498
Preference shares, shares outstanding | 71,338,498 | 71,338,498 | 71,338,498
Liquidation preference value (in Dollars) | $ 371,555,921 | $ 357,724,977 | $ 325,171,745
Class A Common Units |  |  |
Common stock, shares authorized | 128,508,093 | 128,508,093 | 128,508,093
Common stock, shares issued | 10,766,604 | 10,753,375 | 10,741,375
Common stock, shares outstanding | 10,766,604 | 10,753,375 | 10,741,375
Class B-1 Common Units |  |  |
Common stock, shares authorized | 5,199,202 | 5,199,202 | 5,199,202
Common stock, shares issued | 5,162,816 | 5,162,816 | 5,174,897
Common stock, shares outstanding | 5,162,816 | 5,162,816 | 5,174,897
Class B-2 Common Units |  |  |
Common stock, shares authorized | 250,000 | 250,000 | 250,000
Common stock, shares issued | 250,000 | 250,000 | 250,000
Common stock, shares outstanding | 250,000 | 250,000 | 250,000
Class B-3 Common Units |  |  |
Common stock, shares authorized | 250,000 | 250,000 | 250,000
Common stock, shares issued | 250,000 | 250,000 | 250,000
Common stock, shares outstanding | 250,000 | 250,000 | 250,000
Class B-4 Common Units |  |  |
Common stock, shares authorized | 4,500,000 | 4,500,000 | 4,500,000
Common stock, shares issued | 4,483,971 | 4,483,971 | 0
Common stock, shares outstanding | 4,483,971 | 4,483,971 | 0

X
- Definition common stock subject to possible redemption. + References No definition available. + Details
Name: | nn_CommonStockSubjectToPossibleRedemption
Namespace Prefix: | nn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cumulative amount of depreciation (related to long-lived flight assets used in the entity's principle business operations, including owned aircraft and on capital lease, as well as capitalized improvements) that has been recognized in the income statement. + References No definition available. + Details
Name: | us-gaap_FlightEquipmentAccumulatedDepreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Value of the difference between preference in liquidation and the par or stated values of the preferred shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockLiquidationPreferenceValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nn_ClassCConvertiblePreferredMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nn_ClassDConvertiblePreferredMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nn_ClassACommonUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nn_ClassB1CommonUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nn_ClassB2CommonUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nn_ClassB3CommonUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nn_ClassB4CommonUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |