v3.25.1
Cover Page - 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 000-26770  
Entity Registrant Name NOVAVAX, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 22-2816046  
Entity Address, Address Line One 700 Quince Orchard Road,  
Entity Address, City or Town Gaithersburg,  
Entity Address, Country MD  
Entity Address, Postal Zip Code 20878  
City Area Code 240  
Local Phone Number 268-2000  
Title of 12(b) Security Common Stock, Par Value $0.01 per share  
Trading Symbol NVAX  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   161,970,338
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001000694  
Current Fiscal Year End Date --12-31