v3.25.1
Cover - shares
 3 Months Ended
Mar. 31, 2025
May 01, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-41314  
Entity Registrant Name AMPRIUS TECHNOLOGIES, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 98-1591811  
Entity Address, Address Line One 1180 Page Avenue  
Entity Address, City or Town Fremont  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94538  
City Area Code 800  
Local Phone Number 425-8803  
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   120,546,077
Entity Central Index Key 0001899287  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common stock, $0.0001 par value  
Trading Symbol AMPX  
Security Exchange Name NYSE  
Redeemable warrants    
Document Information [Line Items]    
Title of 12(b) Security Redeemable warrants, each exercisable for one share of common stock at an exercise price of $11.50  
Trading Symbol AMPX.W  
Security Exchange Name NYSE