| Cover | Nov. 02, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 2, 2021 |
| Entity Registrant Name | InfuSystem Holdings, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35020 |
| Entity Tax Identification Number | 20-3341405 |
| Entity Address, Address Line One | 3851 West Hamlin Road |
| Entity Address, City or Town | Rochester Hills |
| Entity Address, State or Province | MI |
| Entity Address, Postal Zip Code | 48309 |
| City Area Code | 248 |
| Local Phone Number | 291-1210 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $.0001 per share |
| Trading Symbol | INFU |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001337013 |
| Amendment Flag | false |
