Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2023
Nov. 07, 2023
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2023  
Document Transition Report false  
Entity File Number 001-41261  
Entity Registrant Name DIRECT DIGITAL HOLDINGS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 87-2306185  
Entity Address, Address Line One 1177 West Loop South  
Entity Address, Adress Line Two Suite 1310  
Entity Address, City or Town Houston  
Entity Address State Or Province TX  
Entity Address, Postal Zip Code 77027  
City Area Code 832  
Local Phone Number 402-1051  
Title of 12(b) Security Class A Common Stock, par value $0.001 per share  
Trading Symbol DRCT  
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 true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Central Index Key 0001880613  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Common Class A    
Entity Common Stock, Shares Outstanding   2,992,425
Common Class B    
Entity Common Stock, Shares Outstanding   11,278,000