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Commitments and Contingencies - Schedule of Future Minimum Lease Commitments for Operating and Financing Leases (Details) (Parenthetical) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract] |
Payments for tenant improvements | $ 1,100
Tenant improvement allowance | 1,300
Tenant improvement allowance remaining balance | $ 200

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- Definition Tenant improvement allowance remaining balance. + References No definition available. + Details
Name: | OCX_TenantImprovementAllowanceRemainingBalance
Namespace Prefix: | OCX_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of cash outflow for the allowance granted to lessee and/or direct costs incurred by lessor used to prepare the leased premises for tenant's occupancy. + References No definition available. + Details
Name: | us-gaap_PaymentsForTenantImprovements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
Name: | us-gaap_TenantImprovements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant