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Note 8 - Leases (Details Textual) | 12 Months Ended |
--- | --- | ---
Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) ft² | Oct. 31, 2016 USD ($) | Apr. 30, 2015 ft²
Operating Leases, Rent Expense, Net, Total | $ | $ 422,102 | $ 403,178 | $ 391,116 |
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member] |  |  |  |
Area of Real Estate Property |  | 34,000 |  |
Operating Lease for Warehouse Space in Roanoke, Virginia [Member] |  |  |  |
Area of Real Estate Property |  |  |  | 36,000
Lessee, Operating Lease, Term of Contract |  |  |  | 1 year
Lease Term, Extension, Term | 1 year |  |  |
Lease Term, Extension, Remaining Number | 1 |  |  |

X
- Definition The remaining number of available extensions to a lease term. + References No definition available. + Details
Name: | occ_LeaseTermExtensionRemainingNumber
Namespace Prefix: | occ_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the extension of a term lease by the additional years added. + References No definition available. + Details
Name: | occ_LeaseTermExtensionTerm
Namespace Prefix: | occ_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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Balance Type: | na
Period Type: | instant

X
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |