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

Unaudited Interim Condensed Consolidated Statements of Cash Flows Supplemental Information - Summary of Significant Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flow Non Cash Investing And Financing Activities Disclosure [Line Items]
Non-cash consideration for paid-in-kind interest	$ 11,648	$ 15,142
Non-cash issuance of shares from consummation of the Recapitalization Transaction	0	455,443
Non-cash debt extinguishment from the consummation of the Recapitalization Transaction	0	(238,269)
Non-cash issuance of June Secured Debentures and June Unsecured Debentures from the consummation of the Recapitalization Transaction	0	99,402
Shares issued to settle MPX purchase options assumed from the MPX Acquisition		1,500
New Jersey Senior Secured Bridge Notes [Member] \| I Anthus New Jersey LLC [Member]
Cash Flow Non Cash Investing And Financing Activities Disclosure [Line Items]
Non-cash consideration for paid-in-kind interest	10,576	4,949
Non-cash consideration for asset acquisition	$ 0	$ 19,193