v3.19.2
Document And Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 06, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name SECOND SIGHT MEDICAL PRODUCTS INC  
Entity Central Index Key 0001266806  
Trading Symbol eyes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Current Reporting Status 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 Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity File Number 001-36747  
Entity Tax Identification Number 020692322  
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   124,586,323