| Cover | Mar. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 30, 2021 |
| Entity Registrant Name | CHANNELADVISOR CORPORATION |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35940 |
| Entity Tax Identification Number | 56-2257867 |
| Entity Address, Address Line One | 3025 Carrington Mill Boulevard |
| Entity Address, City or Town | Morrisville |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 27560 |
| City Area Code | 919 |
| Local Phone Number | 228-4700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | ECOM |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001169652 |
| Amendment Flag | false |
