iAnthus Capital Holdings, Inc. Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands						3 Months Ended		6 Months Ended
	Jul. 02, 2024	Apr. 24, 2024	Jan. 05, 2024	Apr. 20, 2023	Jan. 03, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Tax obligation related to employees withheld shares								$ 48	$ 231
Maximum [Member] \| Subsequent Event [Member]
Tax obligation related to employees withheld shares	$ 100
Common Stock [Member]
Shares issued, Shares, Share based payment arrangement						486,000	9,255,000	25,947,000	52,813,000
Share settlement for taxes paid related to restricted stock units, shares						(162,000)	(3,103,000)	(2,462,000)	(10,879,000)
Common Stock [Member] \| Subsequent Event [Member]
Share settlement for taxes paid related to restricted stock units, shares	6,423,000
Restricted Stock Units (RSUs) [Member]
Share settlement for taxes paid related to restricted stock units, shares		162	2,300	3,103	7,776
Restricted Stock Units (RSUs) [Member] \| Common Stock [Member] \| Subsequent Event [Member]
Shares issued, Shares, Share based payment arrangement	11,554,000