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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 28, 2025
Jun. 28, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
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 Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 170.6
Entity Common Stock, Shares Outstanding   115,896,849  
Documents Incorporated by Reference

Part III of this annual report on Form 10-K incorporates by reference certain information from the registrant’s definitive proxy statement for the 2025 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year ended December 31, 2024.

    
Auditor Name Ernst & Young LLP    
Auditor Firm ID 42    
Auditor Location San Mateo, California    
Entity Central Index Key 0001512762    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false