XML 12 R1.htm IDEA: XBRL DOCUMENT v3.23.2
Cover Page - shares
 6 Months Ended
Jun. 30, 2023
Aug. 09, 2023
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2023  
Document Transition Report false  
Entity File Number 001-39128  
Entity Registrant Name Momentus Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 84-1905538  
Entity Address, Address Line One 3901 N. First Street  
Entity Address, City or Town San Jose  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95134  
City Area Code 650  
Local Phone Number 564-7820  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Smaller Reporting Company true  
Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   97,866,756
Entity Central Index Key 0001781162  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Class A common stock    
Document Information [Line Items]    
Title of 12(b) Security Class A common stock  
Trading Symbol MNTS  
Security Exchange Name NASDAQ  
Warrants    
Document Information [Line Items]    
Title of 12(b) Security Warrants  
Trading Symbol MNTSW  
Security Exchange Name NASDAQ