Business Combination - Summary of Unaudited Pro Forma Information (Detail) - Rabern Rentals, LLC [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Business Acquisition [Line Items]
Net revenues	$ 70,525	$ 64,675	$ 136,468	$ 117,194
Income before income taxes	(1,540)	5,044	(1,850)	4,570
Net income (loss)	(1,950)	4,927	(2,376)	4,196
Net income (loss) attributable to shareholders of Manitex International, Inc.	$ (2,203)	$ 4,933	$ (2,612)	$ 4,015
Basic
Net income (loss)	$ (0.10)	$ 0.25	$ (0.12)	$ 0.21
Net income (loss) attributable to shareholders of Manitex International, Inc.	(0.11)	0.25	(0.13)	0.20
Diluted
Net income (loss)	(0.10)	0.25	(0.12)	0.21
Net income (loss) attributable to shareholders of Manitex International, Inc.	$ (0.11)	$ 0.25	$ (0.13)	$ 0.20
Amortization	$ 87	$ 87	$ 174	$ 174
Depreciation	455	455	910	910
Interest expense	617	617	1,234	1,234
Transaction cost	1,886	1,886	2,199	2,199
Income tax (expense) benefit of above items	$ (176)	$ 200	$ (160)	$ 235