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

Annual report [Section 13 and 15(d), not S-K Item 405]

Cover
- Cover Page
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Related Party Transactions - Additional Information (Detail)

v3.26.1

Related Party Transactions - Additional Information (Detail) - USD ($)			12 Months Ended
	Sep. 02, 2025	Feb. 05, 2025	Dec. 31, 2025	Dec. 31, 2024
Related Party Transaction [Line Items]
Related party payable			$ 192,120,000	$ 187,386,000
Business Combination, Acquisition Related Costs			0	100,000
Proceeds from Sale of Notes Receivable			$ 1,715,000	0
Other Equity Method Investees [Member]
Related Party Transaction [Line Items]
Company's acquisition equity interests			5.00%
AZ Note [Member] \| Deferred Professional Fees [Member]
Related Party Transaction [Line Items]
Related party payable	$ 900,000
Proceeds from Sale of Notes Receivable	$ 300,000
Lenders [Member]
Related Party Transaction [Line Items]
Related Party Interest Payable			$ 100,000	200,000
Lenders [Member] \| Deferred Professional Fees [Member]
Related Party Transaction [Line Items]
Related party payable			6,300,000
Lenders [Member] \| Deferred Professional Fees [Member] \| Other Equity Method Investees [Member]
Related Party Transaction [Line Items]
Company's acquisition equity interests		8.00%
Related party payable		$ 1,000,000	$ 2,200,000	$ 9,200,000
Severance payments		$ 5,000,000
Lenders [Member] \| Maximum [Member] \| Deferred Professional Fees [Member]
Related Party Transaction [Line Items]
Related party transaction rate of interest			20.00%
Lenders [Member] \| Minimum [Member] \| Deferred Professional Fees [Member]
Related Party Transaction [Line Items]
Related party transaction rate of interest			12.00%

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