XML 61 R44.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Cash and Investments - Narrative (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) investment | Dec. 31, 2020 USD ($) investment | Dec. 31, 2019 USD ($)
Available-for-Sale Debt Securities |  |  |
Short-term available-for-sale securities contractual maturities, maximum | 1 year |  |
Long-term securities contractual maturities, minimum | 1 year |  |
Other-than-temporary impairment | $ | $ 0 | $ 0 | $ 0
Investment in continuous unrealized loss position for more than one year | investment | 0 | 0 |

X
- Definition Available-For-Sale Securities, Debt Securities, Current, Contractual Maturities, Maximum + References No definition available. + Details
Name: | ardx_AvailableForSaleSecuritiesDebtSecuritiesCurrentContractualMaturitiesMaximum
Namespace Prefix: | ardx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Available-For-Sale Securities, Debt Securities, Noncurrent, Contractual Maturities, Minimum + References No definition available. + Details
Name: | ardx_AvailableForSaleSecuritiesDebtSecuritiesNoncurrentContractualMaturitiesMinimum
Namespace Prefix: | ardx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562 + Details
Name: | us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration