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Note 7 - Property, Plant, and Equipment, Hotel Properties (Details Textual) (Hotel Properties [Member], USD $)
12 Months Ended
Jan. 31, 2015
Property, Plant and Equipment, Additions $ 3,843,000us-gaap_PropertyPlantAndEquipmentAdditions
Land [Member]
 
Property, Plant and Equipment, Additions $ 2,500,000us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_FairValueByAssetClassAxis
= iht_HotelPropertiesMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember