XML 15 R1.htm IDEA: XBRL DOCUMENT v3.21.2
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2021
Oct. 29, 2021
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Trading Symbol KOD  
Entity Registrant Name KODIAK SCIENCES INC.  
Entity Central Index Key 0001468748  
Entity Current Reporting Status Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   51,717,286
Entity File Number 001-38682  
Entity Tax Identification Number 27-0476525  
Entity Address, Address Line One 1200 Page Mill Road  
Entity Address, City or Town Palo Alto  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94304  
City Area Code 650  
Local Phone Number 281-0850  
Entity Interactive Data Current Yes  
Title of 12(b) Security Common stock, par value $0.0001  
Security Exchange Name NASDAQ  
Entity Incorporation, State or Country Code DE  
Document Quarterly Report true  
Document Transition Report false