Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Aug. 02, 2021
Document And Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Registrant Name	MANITEX INTERNATIONAL, INC.
Entity Central Index Key	0001302028
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		19,906,730
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
Entity Incorporation, State or Country Code	MI
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Common Stock [Member]
Document And Entity Information [Line Items]
Trading Symbol	MNTX
Title of 12(b) Security	Common Stock, no par value
Security Exchange Name	NASDAQ
Preferred Share Purchase Rights [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	Preferred Share Purchase Rights
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ