Markforged Holding Corporation Quarterly report pursuant to Section 13 or 15(d)

Equity Based Awards - Summary of Stock-based Compensation based on Awards Granted (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense for restricted stock units and options	$ 3,142	$ 4,112	$ 9,848	$ 10,158
Stock options
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense for restricted stock units and options	294	684	889	2,138
Restricted Stock Units
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense for restricted stock units and options	2,881	3,459	9,031	8,088
Restricted Stock Units And Options
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense for restricted stock units and options	$ 3,175	$ 4,143	$ 9,920	$ 10,226