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v3.25.3

Inventory - Additional Information (Details) | 9 Months Ended
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Sep. 30, 2025 USD ($)
Inventory Disclosure [Abstract] |
Allowance for excess, damaged and obsolete inventory | $ 0

X
- Definition Allowance for Inventory excess damages and obsolete. + References No definition available. + Details
Name: | itrm_AllowanceForInventoryExcessDamagesAndObsolete
Namespace Prefix: | itrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration