v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
Apr. 30, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-36721  
Entity Registrant Name Coherus BioSciences, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 27-3615821  
Entity Address, Address Line One 333 Twin Dolphin Drive  
Entity Address, Address Line Two Suite 600  
Entity Address, City or Town Redwood City  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94065  
City Area Code 650  
Local Phone Number 649-3530  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol CHRS  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   115,933,276
Entity Central Index Key 0001512762  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false