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Stockholder's Equity - Summary of Warrants Activity (Detail) - $ / shares | 9 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Number of Common Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Beginning Balance | 8,427,508 | 8,427,508
Exercised | (322,893) |
Ending Balance | 8,104,615 | 8,427,508
Number of Pre-funded Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Beginning Balance | 40,492,923 | 24,696,206
Issued | 7,000,000 |
Exercised | (6,209,871) | (2,583,144)
Ending Balance | 41,283,052 | 22,113,062
Common Warrant and Pre-funded Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Weighted-Average Exercise Price, Issued | $ 0.001 |
Weighted-Average Exercise Price, Exercised | $ 0.307 | $ 0.001

X
- Definition Class of warrant or right excercised. + References No definition available. + Details
Name: | annx_ClassOfWarrantOrRightExcercised
Namespace Prefix: | annx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of warrant or right issued + References No definition available. + Details
Name: | annx_ClassOfWarrantOrRightIssued
Namespace Prefix: | annx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of warrant or right weighted average exercise price of warrant exercised. + References No definition available. + Details
Name: | annx_ClassOfWarrantOrRightWeightedAverageExercisePriceOfWarrantExercised
Namespace Prefix: | annx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of Warrant or right, weighted-average exercise price of warrant issued. + References No definition available. + Details
Name: | annx_ClassOfWarrantOrRightWeightedAverageExercisePriceOfWarrantIssued
Namespace Prefix: | annx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
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_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=annx_PrefundedWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=annx_CommonWarrantAndPreFundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |