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Inventory - Additional Information (Details)	9 Months Ended
	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