Note 6 - Long-term Debt and Note Payable to Bank (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jan. 31, 2015	Oct. 31, 2014
North Carolina Real Estate Loan [Member]
Debt Disclosure [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	4.25%	4.25%
Virginia Real Estate Loan [Member]
Debt Disclosure [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	4.25%	4.25%
Revolving Credit Facility [Member] \| The Commercial Loan [Member]
Debt Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	9.0
Line of Credit Facility, Interest Rate at Period End	2.37%
Long-term Line of Credit	3.0	2.5
Line of Credit Facility, Remaining Borrowing Capacity	5.8	6.5
Revolving Credit Facility [Member] \| The Commercial Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Disclosure [Abstract]
Debt Instrument, Basis Spread on Variable Rate	2.20%
Revolving Credit Facility [Member] \| The Commercial Loan [Member] \| Certain Foreign Receivables [Member]
Debt Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category Used For Calculation	35.00%
Line of Credit Facility, Maximum Amount Outstanding During Period	1.0
Revolving Credit Facility [Member] \| The Commercial Loan [Member] \| Certain Raw Materials of Inventory [Member]
Debt Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category Used For Calculation	25.00%
Revolving Credit Facility [Member] \| The Commercial Loan [Member] \| Certain Receivables Aged Ninety Days or Over [Member]
Debt Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category Used For Calculation	85.00%
Line of Credit Facility, Maximum Borrowing Capacity, Maximum Aging of Receivables	90 days

Maximum age of eligible receivables used the calculation of allowable borrowings under the terms of the facility.

No definition available.

Name:	occ_LineofCreditFacilityMaximumBorrowingCapacityMaximumAgingOfReceivables
Namespace Prefix:	occ_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category Used for Calculation

+ References

No definition available.

+ Details

Name:	occ_LineOfCreditFacilityMaximumBorrowingCapacityPercentageOfRelatedCategoryUsedForCalculation
Namespace Prefix:	occ_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=occ_NorthCarolinaRealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=occ_VirginiaRealEstateLoanMember
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Period Type: