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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 06, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Trading Symbol CERS    
Entity Registrant Name CERUS CORPORATION    
Entity Central Index Key 0001020214    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Document Financial Statement Error Correction [Flag] false    
Entity Filer Category Accelerated Filer    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Common Stock, Shares Outstanding   185,789,815  
Entity Public Float     $ 240
Title of 12(b) Security Common Stock    
Security Exchange Name NASDAQ    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Entity File Number 000-21937    
Entity Tax Identification Number 68-0262011    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 1220 Concord Avenue    
Entity Address, Address Line Two Suite 600    
Entity Address, City or Town Concord    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94520    
City Area Code 925    
Local Phone Number 288-6000    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement in connection with the registrant’s 2025 Annual Meeting of Stockholders, to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year ended December 31, 2024, are incorporated by reference into Part III of this Annual Report on Form 10-K.

    
Auditor Firm ID 42    
Auditor Name Ernst & Young LLP    
Auditor Location San Mateo, California    
Auditor Opinion [Text Block]

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Cerus Corporation (the Company) as of December 31, 2024 and 2023, the related consolidated statements of operations, comprehensive loss, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 26, 2025 expressed an unqualified opinion thereon.