iAnthus Capital Holdings, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Cover
- Cover Page
Financial Statements
Notes to Financial Statements
Accounting Policies
- Organization and Description of Business (Policies)
Notes Tables
Notes Details

Share Capital - Additional Information (Detail)

v3.26.1

Share Capital - Additional Information (Detail) - USD ($) $ in Thousands						3 Months Ended		12 Months Ended
	Jan. 06, 2026	Dec. 14, 2025	Dec. 01, 2025	Apr. 25, 2025	Jan. 09, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Sep. 29, 2025	Jun. 23, 2022	Dec. 31, 2021
Share settlement for taxes paid related to restricted stock units						$ 2	$ 5
Cheetah Enterprises, Inc. [Member]
Stock issued during period, shares, new issues					41,667
Equity Incentive Plan
Maximum authorized issue of shares, percentage						20.00%
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount						$ 1,200
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition						9 months 18 days
Stock issued during period, shares, new issues	114,334	26,661
Share settlement for taxes paid related to restricted stock units, shares	910	1,029
Share settlement for taxes paid related to restricted stock units	$ 100	$ 100
Share based payment arrangement plan modification fair value of award						$ 0
Share-based compensation arrangement by share-based payment award, number of shares authorized			149,332						250	26,881	363,921
Share-based compensation arrangement by share-based payment award, shares issued in period				5,672		0
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period						0		186,757
Maximum [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based compensation arrangement by share-based payment award, award vesting period			3 years
Minimum [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based compensation arrangement by share-based payment award, award vesting period			1 year
Selling, general and administrative expenses
Share-based payment arrangement expense						$ 0	0
Selling, general and administrative expenses \| Restricted Stock Units (RSUs) [Member]
Share-based payment arrangement expense						$ 500	$ 500

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