| Document and Entity Information | Jul. 29, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 29, 2021 |
| Entity Registrant Name | Aterian, Inc. |
| Entity Central Index Key | 0001757715 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38937 |
| Entity Tax Identification Number | 83-1739858 |
| Entity Address, Address Line One | Aterian, Inc. |
| Entity Address, Address Line Two | 37 East 18th Street |
| Entity Address, Address Line Three | 7th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10003 |
| City Area Code | (347) |
| Local Phone Number | 676-1681 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.0001 par value |
| Trading Symbol | ATER |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
