Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock, Common Stock and Stockholders' Equity (Deficit) - Additional Information (Detail)

v3.21.2
Convertible Preferred Stock, Common Stock and Stockholders' Equity (Deficit) - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Class of Stock [Line Items]        
Payments related to tax withholding for Shares     $ 98
Additional Compensation expense $ 2,800 $ 521 $ 5,774 $ 1,528
Common Stock [Member]        
Class of Stock [Line Items]        
Stock repurchased during period shares 4,499,998      
Common stock repurchase price per share $ 4.52   $ 4.52  
Additional Stock repurchased during period shares     250,471  
Legacy Markforged Common Stock [Member]        
Class of Stock [Line Items]        
Stock repurchased during period shares 4,499,998   4,499,998  
Common stock repurchase price per share $ 10.00   $ 10.00