v3.26.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2026
May 14, 2026
Document Information [Line Items]    
Document Type 10-Q/A  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-41139  
Entity Registrant Name Blaize Holdings, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 86-2708752  
Entity Address, Address Line One 4659 Golden Foothill Parkway  
Entity Address, Address Line Two Suite 206  
Entity Address, City or Town El Dorado Hills  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95762  
City Area Code 916  
Local Phone Number 347-0050  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   142,299,461
Entity Central Index Key 0001871638  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common stock, par value $0.0001 per share  
Trading Symbol BZAI  
Security Exchange Name NASDAQ  
Warrant    
Document Information [Line Items]    
Title of 12(b) Security Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50 per share  
Trading Symbol BZAIW  
Security Exchange Name NASDAQ  
Series A Preferred Stock    
Document Information [Line Items]    
Title of 12(b) Security Series A Junior Participating Preferred Stock, par value $0.0001 per share  
No Trading Symbol Flag true  
Security Exchange Name NASDAQ