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

Summary of Significant Accounting Policies - Summary of Changes in Fair Value of the Derivative Warrant Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Contingent Earnout Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of year	$ 1,379	$ 2,415
Change in fair value	6,274	2,509
Balance at end of year	7,653	4,924
Private Placement Warrant Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of year	189	661
Change in fair value	(189)	(220)
Balance at end of year	0	441
Teton Acquisition Contingent Earnout Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of year	1,500	602
Settlement of liability acquired as part of acquisitions	(1,500)
Balance at end of year	0	602
Total Other Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of year	3,068	3,678
Settlement of liability acquired as part of acquisitions	(1,500)
Change in fair value	6,085	2,289
Balance at end of year	$ 7,653	$ 5,967