Quarterly report [Sections 13 or 15(d)]

Momentus Master Service Agreement - Additional Information (Details)

v3.26.3
Momentus Master Service Agreement - Additional Information (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 9 Months Ended
Dec. 03, 2025
$ / shares
Jun. 27, 2025
$ / shares
Apr. 30, 2025
shares
Sep. 30, 2026
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
$ / shares
Schedule of Equity Method Investments [Line Items]          
Common stock, par value | $ / shares   $ 0.00001   $ 0.00001 $ 0.00001
Reverse Stock Split   1-for-5 and 1-for-50, with the exact ratio to be set within that range by the Company’s Board. On July 18, 2025, the Board approved the reverse stock split at a ratio of 1-for-15 (the “2025 Reverse Stock Split”). On July 25, 2025, the Company filed a Certificate of Amendment to the Company's Certificate of Incorporation, as amended with the Secretary of State of the State of Delaware to effect the 2025 Reverse Stock Split, effective as of July 28, 2025.As a result of the 2025 Reverse Stock Split, every 15 shares of the Company's common stock were automatically reclassified and converted into one issued and outstanding share of common stock.      
Reverse stock split ratio   0.0667      
Customer liabilities - prepaid reserve | $       $ 2,953 $ 1,072
Common Stock [Member]          
Schedule of Equity Method Investments [Line Items]          
Common stock issued       2,246,823  
Master Service Agreement [Member] | Momentus Inc [Member]          
Schedule of Equity Method Investments [Line Items]          
Service agreement term     5 years    
Reverse Stock Split reverse stock split of the Momentus’s issued and outstanding shares of Class A Common Stock, $0.00001 par value per share (the “Common Stock”), at a ratio of 1-for-17.85 (the “Reverse Stock Split”)        
Reverse stock split ratio 0.056        
Master Service Agreement [Member] | Momentus Inc [Member] | Common Stock [Member]          
Schedule of Equity Method Investments [Line Items]          
Common stock issued     26,748    
Master Service Agreement [Member] | Momentus Inc [Member] | Series A Convertible Preferred Stock [Member]          
Schedule of Equity Method Investments [Line Items]          
Common stock issued     673,408    
Master Service Agreement [Member] | Momentus Inc [Member] | Common Class A [Member]          
Schedule of Equity Method Investments [Line Items]          
Common stock, par value | $ / shares $ 0.00001        
Master Service Agreement [Member] | Momentus Inc [Member] | Location, Statement of Financial Position, Balance [Axis]: velo:AccruedExpensesAndOtherLiabilitiesCurrent          
Schedule of Equity Method Investments [Line Items]          
Customer liabilities - prepaid reserve | $       $ 3,000