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Inventory - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Inventory Disclosure [Abstract] |  |
Prepaid commercial manufacturing | $ 13,835 | $ 13,567

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

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