Represents the sale price of a warrant or right.

No definition available.

Name:	ater_ClassOfWarrantOrRightSalePrice
Namespace Prefix:	ater_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the amount of gain (loss) on issuance of equity.

+ References

No definition available.

+ Details

Name:	ater_GainLossOnIssuanceOfEquity
Namespace Prefix:	ater_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Combine issuance price for stock and warrants issuance.

+ References

No definition available.

+ Details

Name:	ater_StockAndWarrantsCombinedIssuancePrice
Namespace Prefix:	ater_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

+ Details

Name:	us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_TypeOfArrangementAxis=ater_SecuritiesPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=ater_CommonStockWarrantsAndPrefundedWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=ater_PrefundedWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=ater_CommonStockWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=ater_RegisteredDirectOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=ater_SeptemberPurchaseAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=ater_CommonStockWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=ater_AccreditedPurchasersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=ater_InsidersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 10 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions				12 Months Ended
	Oct. 04, 2022	Sep. 29, 2022	Mar. 01, 2022	Dec. 31, 2023	Dec. 22, 2021
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					16,667
Securities Purchase Agreement [Member] \| Common Stock Warrants and Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			402,271
Class of Warrant or Right, Sale Price (in dollars per share)			$ 34.92
Securities Purchase Agreement [Member] \| Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			251,155
Securities Purchase Agreement [Member] \| Common Stock Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			188,366
Securities Purchase Agreement [Member] \| Private Placement [Member]
Stock Issued During Period, Shares, New Issues (in shares)			536,361
Stock and Warrants, Combined Issuance Price (in dollars per share)			$ 34.92
Proceeds from Issuance or Sale of Equity			$ 27.5
Securities Purchase Agreement [Member] \| Registered Direct Offering [Member]
Gain (Loss) on Issuance of Equity				$ (12.8)
September Purchase Agreements [Member] \| Common Stock Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		886,920
September Purchase Agreements [Member] \| Common Stock Warrants [Member] \| Accredited Purchasers [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		877,197
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1
September Purchase Agreements [Member] \| Common Stock Warrants [Member] \| Insiders [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		9,722
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1
September Purchase Agreements [Member] \| Registered Direct Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	886,920	886,920
Proceeds from Issuance of Common Stock	$ 20.2
September Purchase Agreements [Member] \| Registered Direct Offering [Member] \| Accredited Purchasers [Member]
Stock Issued During Period, Shares, New Issues (in shares)		877,197
Stock and Warrants, Combined Issuance Price (in dollars per share)		$ 22.8
September Purchase Agreements [Member] \| Registered Direct Offering [Member] \| Insiders [Member]
Stock Issued During Period, Shares, New Issues (in shares)		9,722
Stock and Warrants, Combined Issuance Price (in dollars per share)		$ 25.2