STATEMENT OF CHANGES IN SHAREHOLDERS' DEFICIT (Parenthetical)	6 Months Ended
Dec. 31, 2025 shares
Private placement warrants
Warrants issued	5,500,000

Number of warrants or rights issued during the period.

No definition available.

Name:	itha_ClassOfWarrantOrRightNumberOfWarrantsOrRightsIssued
Namespace Prefix:	itha_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration