Inventories acquired.

No definition available.

Name:	ocdx_InventoriesAcquired
Namespace Prefix:	ocdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Net profit shared under joint venture, before tax.

+ References

No definition available.

+ Details

Name:	ocdx_NetProfitSharedUnderJointVentureBeforeTax
Namespace Prefix:	ocdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Non-refundable upfront payment.

+ References

No definition available.

+ Details

Name:	ocdx_NonRefundableUpfrontPayment
Namespace Prefix:	ocdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Potential additional payments upon achievement of certain regulatory milestones and commercial sales benchmarks.

+ References

No definition available.

+ Details

Name:	ocdx_PotentialAdditionalPaymentsUponAchievementOfCertainRegulatoryMilestonesAndCommercialSalesBenchmarks
Namespace Prefix:	ocdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Potential payments upon achievement of certain cumulative revenue milestones.

+ References

No definition available.

+ Details

Name:	ocdx_PotentialPaymentsUponAchievementOfCertainCumulativeRevenueMilestones
Namespace Prefix:	ocdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sales Recorded Under Agreement

+ References

No definition available.

+ Details

Name:	ocdx_SalesRecordedUnderAgreement
Namespace Prefix:	ocdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ 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 210.5-02.19(a))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

+ Details

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 912
-SubTopic 730
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

+ Details

Name:	us-gaap_ResearchAndDevelopmentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=ocdx_QuotientLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=ocdx_JointBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=ocdx_GrifolsDiagnosticSolutionsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=ocdx_LetterAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Collaborations and Other Relationships - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Sep. 04, 2020	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020	Jan. 03, 2021
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Non-refundable upfront payment		$ 0.0	$ 7.5	$ 0.0	$ 7.5
Research and development expense		32.1	32.7	91.3	82.1
Accounts payable related to purchases		139.3		139.3		$ 146.2
Quotient Limited
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Sales to Quotient		0.1	0.1	0.1	0.2
Joint Business \| Grifols Diagnostic Solutions, Inc.
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Net profit shared under joint venture, before tax		21.3	13.4	45.5	35.9
Letter Agreement \| Quotient Limited
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Non-refundable upfront payment	$ 7.5
Research and development expense			7.5		7.5
Inventories, purchased		5.1	$ 6.4	17.1	$ 17.1
Accounts payable related to purchases		$ 2.9		$ 2.9		$ 2.3
Letter Agreement \| Quotient Limited \| Maximum
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Potential additional payments upon achievement of certain regulatory milestones and commercial sales benchmarks	60.0
Potential payments upon achievement of certain cumulative revenue milestones	$ 25.0