XML 88 R77.htm IDEA: XBRL DOCUMENT v3.8.0.1

Segment Reporting - Reportable Revenues by Geographic Regions (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 14,053	$ 11,584
Post-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	10,746	7,917
Pre-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	3,307	3,667
North America [Member] | Post-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	10,729	7,902
North America [Member] | Pre-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	929	1,000
Europe [Member] | Post-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	17	15
Europe [Member] | Pre-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	1,973	2,059
Australia [Member] | Post-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Australia [Member] | Pre-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	74	116
Rest of The World [Member] | Post-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Rest of The World [Member] | Pre-Transplant [Member]
Segment Reporting Information [Line Items]
Revenues	$ 331	$ 492

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cdna_PostTransplantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cdna_PreTransplantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=us-gaap_NorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=us-gaap_EuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_AU
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=cdna_RestOfTheWorldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: