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Summary of Significant Accounting Policies - Deferred Initial Public Offering Costs and 2022 Definitive Business Combination Agreement and SPAC Transaction Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 31, 2021
Summary of Significant Accounting Policies |  |  |  |  |
Capitalized offering costs |  |  | $ 0.0 | $ 0.3 | $ 0.8
Offering costs incurred |  |  | 0.0 | 1.5 |
Write-off of offering costs |  |  | 0.3 | $ 2.0 |
Business combination acquisition related costs - Expenses related to definitive business combination agreement and SPAC transaction | $ 2.6 | $ 3.5 | $ 3.0 |  |

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- Definition The amount of capitalized offering costs. + References No definition available. + Details
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Namespace Prefix: | aeon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of offering costs incurred. + References No definition available. + Details
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Namespace Prefix: | aeon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of write-ff of offering costs. + References No definition available. + Details
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Namespace Prefix: | aeon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI https://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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