v3.25.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2025
May 06, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Period End Date Mar. 31, 2025  
Document Quarterly Report true  
Current Fiscal Year End Date --12-31  
Document Transition Report false  
Entity File Number 001-39747  
Entity Registrant Name SEER, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-1153150  
Entity Address, Address Line One 3800 Bridge Parkway  
Entity Address, Address Line Two Suite 102  
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 453-0000  
Title of 12(b) Security 0.00001  
Trading Symbol SEER  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001726445  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Class A common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   54,823,877
Class B common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   4,044,969