Quarterly report pursuant to Section 13 or 15(d)

Medical Equipment and Property - Additional Information (Detail)

v2.4.1.9
Medical Equipment and Property - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Property, Plant and Equipment [Abstract]    
Depreciation expense for medical equipment $ 1.0infu_DepreciationExpenseRelatedToMedicalEquipment $ 0.7infu_DepreciationExpenseRelatedToMedicalEquipment
Depreciation expense for property and equipment (other than medial equipment) recorded in general and administrative expenses $ 0.1us-gaap_Depreciation $ 0.1us-gaap_Depreciation