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

Subsequent Events - Additional Information (Detail)

v3.26.1

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands																		12 Months Ended
	Feb. 16, 2026	Jan. 06, 2026	Nov. 14, 2025	Sep. 30, 2025	Aug. 15, 2025	Jul. 08, 2025	Apr. 23, 2025	Apr. 01, 2025	Jan. 14, 2025	Jan. 14, 2025	Dec. 13, 2024	Oct. 08, 2024	Jul. 02, 2024	Apr. 24, 2024	Feb. 27, 2024	Feb. 02, 2024	Jan. 05, 2024	Dec. 31, 2025	Dec. 31, 2024
Percentage Of Total Outstanding Debt Instrument Principal Amount	8.40%
Stock issued during period, shares, new issues			41,667		41,666	4,733
Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation																		$ 307	$ 283
Restricted Stock Units (RSUs) [Member]
Stock issued during period, shares, new issues				67,478				213	26,661		5,000	66,345	17,977	486		2,000	23,461
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (Shares)				30,117		2,229	9,910	67		1,029		19,830	6,423	162			2,300
Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation				$ 200		$ 100	$ 100	$ 100		$ 100		$ 100	$ 100	$ 100			$ 100
New Jersey Senior Secured Bridge Notes [Member]
Stock issued during period, shares, new issues															61,314
Subsequent Event [Member] \| Restricted Stock Units (RSUs) [Member]
Stock issued during period, shares, new issues		113,424
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (Shares)		910
Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation		$ 100
Subsequent Event [Member] \| New Jersey Senior Secured Bridge Notes [Member]
Aggregate initial principal amount	$ 11,000
Debt Instrument, Maturity Date Range, End	Jun. 24, 2027
INJ \| Subsequent Event [Member] \| New Jersey Senior Secured Bridge Notes [Member]
Debt Instrument, Issuance Date	Feb. 02, 2021
Debt Instrument, Maturity Date	Feb. 16, 2026
Debt instrument, redemption price, percentage of principal amount redeemed	2.00%

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