v3.22.4
Cover - shares
 3 Months Ended
Dec. 31, 2022
Feb. 01, 2023
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Dec. 31, 2022  
Document Transition Report false  
Entity File Number 1-31923  
Entity Registrant Name UNIVERSAL TECHNICAL INSTITUTE, INC  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 86-0226984  
Entity Address, Address Line One 4225 East Windrose Drive  
Entity Address, Address Line Two Suite 200  
Entity Address, City or Town Phoenix  
Entity Address, State or Province AZ  
Entity Address, Postal Zip Code 85032  
City Area Code 623  
Local Phone Number 445-9500  
Title of 12(b) Security Common Stock, $0.0001 par value  
Trading Symbol UTI  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   33,974,478
Entity Central Index Key 0001261654  
Current Fiscal Year End Date --09-30  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q1  
Amendment Flag false