Borrowings - Sale and Leaseback Financing - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Jun. 30, 2016	Jan. 03, 2021
Debt Disclosure [Abstract]
Sale And Leaseback Financing Assets Sold	$ 36.3
Initial term	two years
Monthly rental payments	$ 1.5
Security deposit		$ 9.1
Financing period		42 months
Financing obligation	$ 36.3

Sale and leaseback financing arrangement period.

No definition available.

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Namespace Prefix:	ocdx_
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Period Type:	duration

- Definition

Sale and leaseback financing assets sold.

+ References

No definition available.

+ Details

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

- Definition

Sale and leaseback financing obligation.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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- Definition

A description of the terms of the lease(s) related to the assets being leased-back in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123416376&loc=d3e50796-112755

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 40
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123417830&loc=SL77919786-209982

+ Details

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Period Type:	duration

- Definition

The amount of the monthly rental payments due under the lease entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

+ 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 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Balance Type:	debit
Period Type:	instant