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Inventory - Narrative (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
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Inventory Disclosure [Abstract] |  |
Prepaid commercial manufacturing | $ 23,200,000 | $ 13,600,000
Prepaid commercial manufacturing, non-current | $ 4,235,000 | $ 0

X
- Definition Prepaid Commercial Manufacturing + References No definition available. + Details
Name: | ardx_PrepaidCommercialManufacturing
Namespace Prefix: | ardx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Prepaid Commercial Manufacturing, Non Current + References No definition available. + Details
Name: | ardx_PrepaidCommercialManufacturingNonCurrent
Namespace Prefix: | ardx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration