XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.21.2

Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 7 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 18, 2021 | Feb. 19, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 18, 2021 | Jul. 31, 2020
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Proceeds from issuance of common stock in at-the-market offering, net of issuance costs |  |  | $ 62,446,000 | $ 0 |  |
At-the-market offering |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Issuance of common stock in at-the-market offering (shares) | 4.0 | 8.2 | 9.0 |  | 12.2 |
Proceeds from issuance of common stock in at-the-market offering, net of issuance costs |  |  | $ 63,800,000 |  | $ 85,400,000 |
Weighted-average sales price per share |  |  | $ 7.10 |  | $ 6.98 |
Commission on sale of stock per agreement (percent) |  |  | 3.00% |  |  |
Common stock |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Maximum aggregate offering price |  |  |  |  |  | $ 250,000,000.0
Common stock | At-the-market offering |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Maximum aggregate offering price |  |  |  |  |  | $ 100,000,000.0

X
- Definition Amount of maximum aggregate offering price. + References No definition available. + Details
Name: | ardx_MaximumAggregateOfferingPrice
Namespace Prefix: | ardx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sale Of Stock, Weighted-Average Price Per Share + References No definition available. + Details
Name: | ardx_SaleOfStockWeightedAveragePricePerShare
Namespace Prefix: | ardx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock Issuance Cost, Commission, Percent + References No definition available. + Details
Name: | ardx_StockIssuanceCostCommissionPercent
Namespace Prefix: | ardx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SubsidiarySaleOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=ardx_AtMarketOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |