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Security Deposits and Other Assets (Details Narrative) (Brooklyn ImmunoTherapeutics, LLC) - Brooklyn Immunotherapeutics, LLC [Member] - USD ($) | Feb. 09, 2017 | Jan. 24, 2020
--- | --- | ---
Security deposit |  | $ 84,915
Master Services Agreement [Member] |  |
Lease expiration date description | Expires in 2022 |
Amount paid to service provider | $ 300,401 |
Retainer percentage | 10.00% |

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- Definition Amount paid to service provider. + References No definition available. + Details
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Namespace Prefix: | NTN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Lease expiration date description. + References No definition available. + Details
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Namespace Prefix: | NTN_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Retainer percentage. + References No definition available. + Details
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Namespace Prefix: | NTN_
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Balance Type: | na
Period Type: | duration

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- Definition The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease. + 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 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |