v3.26.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 04, 2026
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-39815  
Entity Registrant Name 908 DEVICES INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 45-4524096  
Entity Address, Address Line One 44 Third Avenue  
Entity Address, City or Town Burlington  
Entity Address State Or Province MA  
Entity Address, Postal Zip Code 01803  
City Area Code 857  
Local Phone Number 254-1500  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol MASS  
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 Common Stock, Shares Outstanding   37,813,621
Entity Central Index Key 0001555279  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false