v3.22.2.2
Cover - shares
 9 Months Ended
Sep. 30, 2022
Nov. 04, 2022
Entity Addresses [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2022  
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 106  
Entity Address, City or Town Princeton  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 08540  
City Area Code 609  
Local Phone Number 382-9032  
Title of 12(b) Security Common stock, par value $0.001  
Trading Symbol OYST  
Security Exchange Name NASDAQ  
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  
Entity Ex Transition Period true  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   26,844,292
Amendment Flag false  
Entity Central Index Key 0001720725  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2022  
Former Address    
Entity Addresses [Line Items]    
Entity Address, Address Line One 202 Carnegie Center, Suite 109  
Entity Address, City or Town Princeton  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 08540