Quarterly report pursuant to Section 13 or 15(d)

Medical Equipment and Property - Summary of Medical Equipment (Detail)

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Medical Equipment and Property - Summary of Medical Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Medical Equipment And Property [Abstract]    
Medical Equipment held for sale or rental $ 2,671infu_MedicalEquipmentHeldForSaleOrRental $ 2,255infu_MedicalEquipmentHeldForSaleOrRental
Medical Equipment in rental service 45,849infu_MedicalEquipmentInRentalServicesGross 43,246infu_MedicalEquipmentInRentalServicesGross
Medical Equipment in rent service-pump reserve (145)infu_MedicalEquipmentInRentalServicesReserve (121)infu_MedicalEquipmentInRentalServicesReserve
Accumulated depreciation (23,796)infu_MedicalEquipmentInRentalServicesAccumulatedDepreciation (23,311)infu_MedicalEquipmentInRentalServicesAccumulatedDepreciation
Medical Equipment in rental service-net 21,908infu_MedicalEquipmentInRentalServiceNetOfAccumulatedDepreciation 19,814infu_MedicalEquipmentInRentalServiceNetOfAccumulatedDepreciation
Total $ 24,579infu_MedicalEquipmentNet $ 22,069infu_MedicalEquipmentNet