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Document and Entity Information (USD $)
 6 Months Ended
Jun. 30, 2012
Aug. 07, 2012
Jun. 30, 2011
Document And Entity Information      
Entity Registrant Name NTN BUZZTIME INC    
Entity Central Index Key 0000748592    
Document Type 10-Q    
Document Period End Date Jun. 30, 2012    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? Yes    
Entity Filer Category Smaller Reporting Company    
Entity Public Float     $ 24,674,841
Entity Common Stock, Shares Outstanding   71,046,733  
Document Fiscal Period Focus Q2    
Document Fiscal Year Focus 2012