v3.25.1
Cover - shares
3 Months Ended
Mar. 31, 2025
May 12, 2025
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2025  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Entity File Number 000-56671  
Entity Registrant Name EBR SYSTEMS, INC.  
Entity Central Index Key 0001347123  
Entity Tax Identification Number 57-1164669  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 480 Oakmead Parkway  
Entity Address, City or Town Sunnyvale  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94085  
City Area Code 408  
Local Phone Number 720-1906  
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  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   373,076,861