iAnthus Capital Holdings, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Financial Instruments - Summary Of Changes In Level One and Level Three Financial Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on equity method investments	$ (211)	$ (183)
4 Front Venture Corp.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	56	130
Additions	0	0
Revaluations	(46)	(74)
Loss on equity method investments	0	0
Ending balance	10	56
Other Long-term Investments [Member] \| The Pharm Stand, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	0	0
Additions	125	0
Revaluations	0	0
Loss on equity method investments	0	0
Ending balance	125	0
Other Long-term Investments [Member] \| Island Thyme LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	679	102
Additions	260	760
Revaluations	0	0
Loss on equity method investments	(211)	(183)
Ending balance	$ 728	$ 679

Amount of income (loss) for proportionate share of equity method investee's income (loss).