Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Nov. 10, 2021
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2021  
Entity File Number 001-39441  
Entity Registrant Name Kubient, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-1808844  
Entity Address, Address Line One 500 7th Avenue  
Entity Address, Adress Line Two 8th Floor  
Entity Address, City or Town New York  
Entity Address State Or Province NY  
Entity Address, Postal Zip Code 10018  
City Area Code 800  
Local Phone Number 409-9456  
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   14,252,886
Entity Central Index Key 0001729750  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.00001 per share  
Trading Symbol KBNT  
Security Exchange Name NASDAQ  
Document Information [Line Items]    
Title of 12(b) Security Common Stock Purchase Warrants  
Trading Symbol KBNTW  
Security Exchange Name NASDAQ