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Cover - shares
 3 Months Ended
Apr. 30, 2024
May 31, 2024
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Apr. 30, 2024  
Document Transition Report false  
Entity File Number 001-40601  
Entity Registrant Name Couchbase, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 26-3576987  
Entity Address, Street 3250 Olcott Street  
Entity Address, City Santa Clara  
Entity Address, State CA  
Entity Address, Postal Zip Code 95054  
City Area Code 650  
Local Phone Number 417-7500  
Title of each class Common stock, par value $0.00001 per share  
Trading Symbol(s) BASE  
Name of each exchange on which registered NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   50,309,880
Entity Central Index Key 0001845022  
Current Fiscal Year End Date --01-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false