Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 03, 2021
Cover [Abstract]
Document Type	10-Q/A
Amendment Flag	true
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Registrant Name	Aterian, Inc.
Entity Central Index Key	0001757715
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		30,624,056
Entity File Number	001-38937
Entity Tax Identification Number	83-1739858
Entity Address, Address Line One	37 East 18th Street
Entity Address, Address Line Two	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
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Title of each class	Common Stock, $0.0001 par value per share
Trading Symbol(s)	ATER
Name of each exchange on which registered	NASDAQ
Amendment Description	EXPLANATORY NOTE This Amendment No. 1 to Quarterly Report on Form 10-Q/A (this “Amendment”) is being filed by Aterian, Inc. (the “Company”) to amend the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2021, which was originally filed with the Securities and Exchange Commission (the “SEC”) on May 11, 2021 (the “Original Form 10-Q”). The Company is filing this Amendment solely to correct an inadvertent omission of certain language from paragraph 4 of the certification of its Chief Executive Officer filed as Exhibit 31.1 and the certification of its Chief Financial Officer filed as Exhibit 31.2 to the Original Form 10-Q. Except as described above, no attempt has been made in this Amendment to modify or update the other disclosures in the Original Form 10-Q. Other than as specifically stated herein, this Amendment continues to speak as of the date of the Original Form 10-Q, and the Company has not updated the disclosures contained therein to reflect any events which occurred at a date subsequent to the filing of the Original Form 10-Q. Accordingly, this Amendment should be read in conjunction with the Original Form 10-Q.