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

Segment Information - Additional Information (Detail)

Segment Information - Additional Information (Detail)	3 Months Ended		9 Months Ended
Segment Information - Additional Information (Detail)	Sep. 30, 2026 Customer	Sep. 30, 2025 Customer	Sep. 30, 2026 Customer Segment	Sep. 30, 2025 Customer
Product Information [Line Items]
Number Of Reportable Segments \| Segment			2
Customer Concentration Risk \| Revenue Benchmark
Product Information [Line Items]
Entity wide revenue major customer \| Customer	0	0	0	0
Customer Concentration Risk \| Revenue Benchmark \| Customer [Member]
Product Information [Line Items]
Credit risk			10.00%

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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