XML 67 R56.htm IDEA: XBRL DOCUMENT v3.26.1

Stockholders' Equity - Summary of Common Stock Reserved For Issuance (Details) - shares	Mar. 31, 2026	Dec. 31, 2025
Share Repurchase Program [Line Items]
Total (in shares)	9,757,606	10,140,456
Remaining shares reserved for issuance under the 2016 Inducement Equity Incentive Plan, 2019 Inducement Equity Incentive Plan, and 2024 Equity Incentive Plan
Share Repurchase Program [Line Items]
Total (in shares)	1,855,798	3,188,940
Shares reserved under the Employee Stock Purchase Plan
Share Repurchase Program [Line Items]
Total (in shares)	613,740	541,706
Common stock options outstanding
Share Repurchase Program [Line Items]
Total (in shares)	2,433,684	2,478,871
RSUs and PSUs outstanding
Share Repurchase Program [Line Items]
Total (in shares)	4,854,384	3,930,939

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

+ Details

Name:	srt_ShareRepurchaseProgramLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_PlanNameAxis=cdna_EquityIncentivePlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=cdna_EmployeeStockPurchasePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=cdna_RestrictedStockUnitsRSUsAndPerformanceStockUnitsPSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: