| Document and Entity Information | Mar. 11, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001302028 |
| Document Type | 8-K |
| Document Period End Date | Mar. 11, 2021 |
| Entity Registrant Name | MANITEX INTERNATIONAL, INC. |
| Entity Incorporation State Country Code | MI |
| Entity File Number | 001-32401 |
| Entity Tax Identification Number | 42-1628978 |
| Entity Address, Address Line One | 9725 Industrial Drive |
| Entity Address, City or Town | Bridgeview |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60455 |
| City Area Code | (708) |
| Local Phone Number | 430-7500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, no par value |
| Trading Symbol | MNTX |
| Security Exchange Name | NASDAQ |
| Preferred Share Purchase Rights [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Preferred Share Purchase Rights |
| Security Exchange Name | NASDAQ |
