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Basis of Presentation (Details Narrative) $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2019 Number
Number of venues | Number		2,565
Loan and Security Agreement [Member] | Avidbank [Member]
Aggregate amount of unrestricted cash to be maintained	$ 2,000
Loan and Security Agreement [Member] | Avidbank [Member] | Minimum [Member]
Aggregate amount of unrestricted cash to be maintained	$ 2,000

X

- Definition

Aggregate amount of unrestricted cash to be maintained.

+ References

No definition available.

+ Details

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

X

- Definition

Number of venues.

+ References

No definition available.

+ Details

Name:	NTN_NumberOfVenues
Namespace Prefix:	NTN_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=NTN_AvidbankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: