Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Oct. 31, 2021
Document and Entity Information [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Entity File Number 001-37379  
Entity Registrant Name ONE GROUP HOSPITALITY, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 14-1961545  
Entity Address, Address Line One 1624 Market Street  
Entity Address, Address Line Two Suite 311  
Entity Address, City or Town Denver  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80202  
City Area Code 646  
Local Phone Number 624-2400  
Title of 12(b) Security Common Stock  
Trading Symbol STKS  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   32,107,635
Entity Central Index Key 0001399520  
Amendment Flag false