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Document and Entity Information	9 Months Ended
	Sep. 30, 2020
Cover [Abstract]
Entity Registrant Name	NTN BUZZTIME INC
Entity Central Index Key	0000748592
Document Type	S-4/A
Amendment Flag	true
Amendment Description	AMENDMENT NO. 1
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false

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