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

Annual report pursuant to Section 13 and 15(d)

Share-based Compensation - Summary of Stock Option and Inducement Stock Option Activity (Detail)

Share-based Compensation - Summary of Stock Option and Inducement Stock Option Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
2007 Plan (Options) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Authorized Shares, Options outstanding, beginning balance	1,593,334	1,375,000
Weighted-Average Remaining Contractual Term (in Years), Granted	1 year 4 months 21 days	2 years 8 months 9 days
Number of Authorized Shares, Granted	245,000	245,000
Weighted-Average Remaining Contractual Term (in Years)	1 year 6 months 4 days	3 years 1 month 2 days	3 years 7 months 13 days
Number of Authorized Shares, Exercised	(212,949)
Number of Authorized Shares, Exercised shares forgone to satisfy minimum statutory withholding	(38,029)
Number of Authorized Shares, Forfeited	(992,356)	(26,666)
Number of Authorized Shares, Options outstanding, ending balance	595,000	1,593,334	1,375,000
Number of Authorized Shares, Exercisable at December 31, 2014	397,084
Weighted-Average Exercise Price, Outstanding, beginning balance	$ 2.11	$ 2.21
Weighted-Average Exercise Price, Granted	$ 2.83	$ 1.52
Weighted-Average Exercise Price, Exercised	$ 2.18
Weighted-Average Exercise Price, Forfeited	$ 2.22	$ 2.13
Weighted-Average Exercise Price, Outstanding, ending balance	$ 2.19	$ 2.11	$ 2.21
Aggregate Intrinsic value, Outstanding, beginning balance	$ 53,083
Weighted-Average Exercise Price, Exercisable at December 31, 2014	$ 2.03
Aggregate Intrinsic value, Outstanding, ending balance	571,717	53,083
2014 Plan (Options) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Remaining Contractual Term (in Years), Granted	5 years
Number of Authorized Shares, Granted	530,000
Weighted-Average Remaining Contractual Term (in Years)	5 years
Number of Authorized Shares, Options outstanding, ending balance	530,000
Weighted-Average Exercise Price, Granted	$ 2.69
Weighted-Average Exercise Price, Outstanding, ending balance	$ 2.69
Aggregate Intrinsic value, Outstanding, ending balance	243,800
Inducement Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Authorized Shares, Options outstanding, beginning balance	800,000
Weighted-Average Remaining Contractual Term (in Years), Granted		4 years 10 months 13 days
Number of Authorized Shares, Granted		800,000.0
Weighted-Average Remaining Contractual Term (in Years)	3 years 10 months 21 days	4 years 10 months 13 days
Number of Authorized Shares, Options outstanding, ending balance	800,000	800,000
Number of Authorized Shares, Exercisable at December 31, 2014	339,583
Weighted-Average Exercise Price, Outstanding, beginning balance	$ 2.25
Weighted-Average Exercise Price, Granted		$ 2.25
Weighted-Average Exercise Price, Outstanding, ending balance	$ 2.25	$ 2.25
Aggregate Intrinsic value, Outstanding, beginning balance	156,000
Weighted-Average Exercise Price, Exercisable at December 31, 2014	$ 2.27
Aggregate Intrinsic value, Outstanding, ending balance	$ 720,000	$ 156,000