InfuSystem Holdings, Inc. Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Applicable Rates and Commitment Fees Percentage (Detail)

Debt - Schedule of Applicable Rates and Commitment Fees Percentage (Detail) - Third Amended Credit Agreement [Member]	Jun. 28, 2017
Leverage Ratio Level I Less than 1.5:1.0 [Member]
Line of Credit Facility [Line Items]
Commitment Fee Rate	0.25%
Leverage Ratio Level II Less than 2.0:1.0 to 1.0 but Greater than or Equal to 1.5:1.0 [Member]
Line of Credit Facility [Line Items]
Commitment Fee Rate	0.25%
Leverage Ratio Level III Less than 2.5:1.0 to 1.0 but Greater than or Equal to 2.0:1.0 [Member]
Line of Credit Facility [Line Items]
Commitment Fee Rate	0.25%
Leverage Ratio Level IV Less than 3.0:1.0 to1.0 but Greater than or Equal to 2.5:1.0 [Member]
Line of Credit Facility [Line Items]
Commitment Fee Rate	0.25%
Leverage Ratio Level V Greater than or Equal to 3.0:1.0 [Member]
Line of Credit Facility [Line Items]
Commitment Fee Rate	0.25%
CBFR Spread [Member] \| Leverage Ratio Level I Less than 1.5:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	(1.00%)
CBFR Spread [Member] \| Leverage Ratio Level II Less than 2.0:1.0 to 1.0 but Greater than or Equal to 1.5:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	(0.75%)
CBFR Spread [Member] \| Leverage Ratio Level III Less than 2.5:1.0 to 1.0 but Greater than or Equal to 2.0:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	(0.50%)
CBFR Spread [Member] \| Leverage Ratio Level IV Less than 3.0:1.0 to1.0 but Greater than or Equal to 2.5:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	0.00%
CBFR Spread [Member] \| Leverage Ratio Level V Greater than or Equal to 3.0:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	0.25%
Eurodollar Spread [Member] \| Leverage Ratio Level I Less than 1.5:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	2.00%
Eurodollar Spread [Member] \| Leverage Ratio Level II Less than 2.0:1.0 to 1.0 but Greater than or Equal to 1.5:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	2.25%
Eurodollar Spread [Member] \| Leverage Ratio Level III Less than 2.5:1.0 to 1.0 but Greater than or Equal to 2.0:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	2.50%
Eurodollar Spread [Member] \| Leverage Ratio Level IV Less than 3.0:1.0 to1.0 but Greater than or Equal to 2.5:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	2.75%
Eurodollar Spread [Member] \| Leverage Ratio Level V Greater than or Equal to 3.0:1.0 [Member]
Line of Credit Facility [Line Items]
CBFR/Eurodollar Spread	3.00%