Markforged Holding Corporation Annual report [Section 13 and 15(d), not S-K Item 405]

Common Stock and Stockholders' Equity - Summary of Common Stock Reserved for Future Issuance (Detail) - shares	Dec. 31, 2024	Dec. 31, 2023
Schedule Of Convertible Preferred Stock [Line Items]
Total shares of authorized common stock reserved for future issuance	7,797,680	7,165,846
Common stock options outstanding and unvested RSU [Member]
Schedule Of Convertible Preferred Stock [Line Items]
Total shares of authorized common stock reserved for future issuance	2,548,740	2,619,944
Shares available for issuance under the 2021 plan [Member]
Schedule Of Convertible Preferred Stock [Line Items]
Total shares of authorized common stock reserved for future issuance	3,207,304	2,702,849
Common stock warrants outstanding [Member]
Schedule Of Convertible Preferred Stock [Line Items]
Total shares of authorized common stock reserved for future issuance	852,500	852,500
Shares available for issuance as Earnout RSU [Member]
Schedule Of Convertible Preferred Stock [Line Items]
Total shares of authorized common stock reserved for future issuance	140,000	140,000
Employee stock purchase plan [Member]
Schedule Of Convertible Preferred Stock [Line Items]
Total shares of authorized common stock reserved for future issuance	1,049,136	850,553