v3.22.2.2
Cover - shares
 9 Months Ended
Sep. 30, 2022
Nov. 11, 2022
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2022  
Document Transition Report false  
Entity File Number 001-36773  
Entity Registrant Name F45 Training Holdings Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 84-2529722  
Entity Address, Address Line One 3601 South Congress Avenue  
Entity Address, Address Line Two Building E  
Entity Address, City or Town Austin  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 78704  
City Area Code 737  
Local Phone Number 787-1955  
Title of 12(b) Security Common stock, par value $0.00005  
Trading Symbol FXLV  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   97,315,803
Entity Central Index Key 0001788717  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3