| Document And Entity Information | Dec. 17, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 17, 2021 |
| Entity Registrant Name | Markforged Holding Corp |
| Entity Central Index Key | 0001816613 |
| Entity Emerging Growth Company | true |
| Entity File Number | 001-39453 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 98-1545859 |
| Entity Address, Address Line One | 480 Pleasant Street |
| Entity Address, City or Town | Watertown |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02472 |
| City Area Code | 866 |
| Local Phone Number | 496-1805 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Ex Transition Period | false |
| Common Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | MKFG |
| Security Exchange Name | NYSE |
| Redeemable Warrants, each whole warrant exercisable for one share of Common Stock, $0.0001 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Redeemable Warrants, each whole warrant exercisable for one share of Common Stock, $0.0001 par value |
| Trading Symbol | MKFG.WS |
| Security Exchange Name | NYSE |
