v3.19.3
Document And Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 12, 2019
Document Information [Line Items]    
Entity Registrant Name SECOND SIGHT MEDICAL PRODUCTS INC  
Entity Central Index Key 0001266806  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Emerging Growth Company true  
Entity Small Business true  
Entity Ex Transition Period true  
Entity Shell Company false  
Document Type 10-Q  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity File Number 001-36747  
Entity Incorporation, State or Country Code CA  
Entity Tax Identification Number 02-0692322  
Entity Address, Address Line One 12744 San Fernando Road  
Entity Address, Address Line Two Suite 400  
Entity Address, City or Town Sylmar  
Entity Address, Postal Zip Code 91342  
City Area Code 818  
Local Phone Number 833-5000  
Entity Address, State or Province CA  
Entity Common Stock, Shares Outstanding   124,598,198
Document Quarterly Report true  
Document Transition Report false  
Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Common Stock  
Trading Symbol EYES  
Security Exchange Name NASDAQ  
Warrant    
Document Information [Line Items]    
Title of 12(b) Security Warrants  
Trading Symbol EYESW  
Security Exchange Name NASDAQ