XML 10 R1.htm IDEA: XBRL DOCUMENT v3.26.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 31, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-40956    
Entity Registrant Name Udemy, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 27-1779864    
Entity Address, Address Line One 600 Harrison Street    
Entity Address, Address Line Two 3rd Floor    
Entity Address, City or Town San Francisco    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94107    
City Area Code 415    
Local Phone Number 813-1710    
Title of 12(b) Security Common Stock, $0.00001 par value    
Trading Symbol UDMY    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 778.9
Entity Common Stock, Shares Outstanding   145,935,525  
Documents Incorporated by Reference
None.
    
Amendment Flag false    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Entity Central Index Key 0001607939