Cover Page - USD ($)
$ in Thousands
 7 Months Ended
Dec. 31, 2020
Mar. 23, 2021
Document Information [Line Items]    
Document Type 10-K  
Document Annual Report true  
Document Transition Report false  
Document Period End Date Dec. 31, 2020  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus FY  
Entity Registrant Name Burgundy Technology Acquisition Corp  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Central Index Key 0001815526  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company true  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Public Float $ 359,145  
Entity File Number 98-1580814  
Entity Address, City or Town Grand Cayman  
Entity Address, Country KY  
Entity Address, Postal Zip Code 1102  
City Area Code 345  
Local Phone Number 945-7099  
Entity Incorporation, State or Country Code E9  
Units [Member]    
Document Information [Line Items]    
Trading Symbol BTAQU  
Title of 12(b) Security Units, each consisting of one Class A Ordinary Share and one-half of one Redeemable Warrant  
Security Exchange Name NASDAQ  
Common Class A    
Document Information [Line Items]    
Trading Symbol BTAQ  
Title of 12(b) Security Class A Ordinary Shares, par value $0.0001 per share  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   35,562,500
Warrant [Member]    
Document Information [Line Items]    
Trading Symbol BTAQW  
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A Ordinary Share for $11.50 per share  
Security Exchange Name NASDAQ  
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   8,625,000