Annual report pursuant to section 13 and 15(d)

Medical Equipment - Additional Information (Detail)

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Medical Equipment - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Pump equipment $ 3.4 $ 6.3
Accumulated depreciation related to leased assets 0.6 3.0
Depreciation expense related to medical equipment 5.1 5.2
Pre-Owned Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Medical consignment equipment $ 1.0