InfuSystem Holdings, Inc. Annual report pursuant to Section 13 and 15(d)

Medical Equipment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended		12 Months Ended		1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Pump equipment	$ 6.9infu_PumpEquipmentsNet	$ 3.4infu_PumpEquipmentsNet
Accumulated depreciation related to leased assets	1.3	0.6	1.3	0.6
Depreciation expense related to medical equipment			3.3	5.1
Pre-Owned Equipment [Member]
Property, Plant and Equipment [Line Items]
Medical equipment held for sale or rental - financial institution	0	1.0	0	1.0
Purchase of remaining pre-owned equipment from financial institution					$ 0.6