Expected additional proceeds from loan.

No definition available.

Name:	NTN_ExpectedAdditionalProceedsFromLoan
Namespace Prefix:	NTN_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loan amount, description.

+ References

No definition available.

+ Details

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Namespace Prefix:	NTN_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=NTN_MergerAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=NTN_BrooklynImmunotherapeuticsLLCMember
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- Details

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- Details

Name:	us-gaap_TypeOfArrangementAxis=NTN_AssetPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=NTN_EGamesHoldingsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Merger Agreement and Asset Purchase Agreement (Details Narrative) - USD ($) $ in Thousands			1 Months Ended
	Dec. 02, 2020	Sep. 18, 2020	Jan. 31, 2021	Aug. 12, 2020
Subsequent Event [Member]
Expected additional proceeds from loan	$ 500		$ 500
Merger Agreement [Member] \| Brooklyn Immunotherapeutics LLC [Member] \| Minimum [Member]
Equity interests exchange				94.08%
Shares outstanding precentage				5.92%
Merger Agreement [Member] \| Brooklyn Immunotherapeutics LLC [Member] \| Maximum [Member]
Equity interests exchange				96.74%
Shares outstanding precentage				3.26%
Asset Purchase Agreement [Member] \| eGames.com Holdings LLC [Member]
Proceed from sale of assets		$ 2,000
Proceeds from loan		$ 1,000
Loan amount, description		No assurances can be given that the Company will obtain such $500,000 loan from such affiliate or from any other party.