XML 44 R35.htm IDEA: XBRL DOCUMENT
v3.22.2

Summary of Significant Accounting Policies - Summary of Activity of the Level 3 Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Change in fair value of contingent earn-out liabilities | $ (1,691) | $ (23,349) | $ (4,466) | $ (7,704)
Payment of contingent earn-out liability |  |  | (3,983) |
Fair value of warrants issued in connection with equity offering |  |  | 18,982 |
Exercise of prefunded warrants |  |  | (15,039) |
Level 3 | Fair Value of Contingent Earn-out Considerations |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Liabilities carried at fair value on a recurring basis, Beginning balance |  |  | 9,223 |
Liabilities carried at fair value on a recurring basis, Ending balance | 774 |  | 774 |
Fair Value, Recurring | Level 3 |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Fair value of warrants issued in connection with equity offering |  |  | 18,982 |
Change in fair value of warrant liability |  |  | 7,893 |
Exercise of prefunded warrants |  |  | (15,039) |
Liabilities carried at fair value on a recurring basis, Ending balance | 11,836 |  | 11,836 |
Fair Value, Recurring | Level 3 | Fair Value of Contingent Earn-out Considerations |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Liabilities carried at fair value on a recurring basis, Beginning balance |  |  | 9,223 |
Change in fair value of contingent earn-out liabilities |  |  | (4,466) |
Payment of contingent earn-out liability |  |  | (3,983) |
Liabilities carried at fair value on a recurring basis, Ending balance | $ 774 |  | $ 774 |

X
- Definition Change in fair value of warrant liability. + References No definition available. + Details
Name: | ater_ChangeInFairValueOfWarrantLiability
Namespace Prefix: | ater_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Exercise of pre-funded warrants. + References No definition available. + Details
Name: | ater_ExerciseOfPreFundedWarrants
Namespace Prefix: | ater_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Issuance of warrants in connection with offering. + References No definition available. + Details
Name: | ater_IssuanceOfWarrantsInConnectionWithOffering
Namespace Prefix: | ater_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=ater_ContingentEarnOutConsiderationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |