| Cover | Mar. 25, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 25, 2021 |
| Entity Registrant Name | PFSWEB INC |
| Entity Central Index Key | 0001095315 |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Common stock, $0.001 par value |
| Trading Symbol | PFSW |
| Security Exchange Name | NASDAQ |
| Entity File Number | 000-28275 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 75-2837058 |
| Entity Address, Address Line One | 505 MILLENNIUM DRIVE |
| Entity Address, City or Town | ALLEN |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75013 |
| City Area Code | 972 |
| Local Phone Number | 881-2900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
