v3.19.3
Cover - shares
9 Months Ended
Sep. 30, 2019
Nov. 27, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 001-39112  
Entity Registrant Name OYSTER POINT PHARMA, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 81-1030955  
Entity Address, Address Line One 202 Carnegie Center, Suite 109  
Entity Address, Postal Zip Code 08540  
Entity Address, City or Town Princeton  
Entity Address, State or Province NJ  
Title of 12(b) Security Common stock, par value $0.001  
Trading Symbol OYST  
Security Exchange Name NASDAQ  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Shell Company false  
Entity Central Index Key 0001720725  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Local Phone Number 382-9032  
City Area Code 609  
Entity Common Stock, Shares Outstanding   21,362,538