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Inventory - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Prepaid commercial manufacturing	$ 13,567	$ 9,406

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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