XML 14 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information - shares
 12 Months Ended
Dec. 31, 2017
Apr. 30, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name TDH Holdings, Inc.  
Entity Central Index Key 0001684425  
Amendment Flag false  
Trading Symbol PETZ  
Current Fiscal Year End Date --12-31  
Document Type 20-F  
Document Period End Date Dec. 31, 2017  
Document Fiscal Period Focus FY  
Document Fiscal Year Focus 2017  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   9,423,750