XML 41 R31.htm IDEA: XBRL DOCUMENT
v3.20.2

Organization and Basis of Presentation - Liquidity (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Organization and Basis of Presentation |  |
Cash equivalents and short-term investments, Fair Value | $ 185,497 | $ 247,512

X
- Definition Cash, cash equivalents and short term investments fair value disclosure. + References No definition available. + Details
Name: | ardx_CashCashEquivalentsAndShortTermInvestmentsFairValueDisclosure
Namespace Prefix: | ardx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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