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

No definition available.

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

- Definition

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

+ References

No definition available.

+ Details

Name:	occ_LineofCreditFacilityMaximumBorrowingCapacityMaximumAgingOfReceivables
Namespace Prefix:	occ_
Data Type:	xbrli:durationItemType
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

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: 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

Reference 3: 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

+ 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

+ 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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: 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(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: 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 3: 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=occ_BNCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=occ_CertainReceivablesAgedNinetyDaysOrOverMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=occ_TheCommercialLoanMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=occ_CertainForeignReceivablesMember
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Data Type:	na
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- Details

Name:	us-gaap_StatementScenarioAxis=occ_CertainRawMaterialsofInventoryMember
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Note 6 - Long-term Debt and Note Payable to Bank (Details Textual) - USD ($)		9 Months Ended
	Apr. 26, 2016	Jul. 31, 2016	Feb. 28, 2018	Feb. 28, 2017	Oct. 31, 2015
Virginia Real Estate Loan [Member]
Debt Instrument, Interest Rate, Stated Percentage		4.25%			4.25%
Long-term Debt	$ 5,271,411	$ 5,218,571			$ 5,374,777
North Carolina Real Estate Loan [Member]
Debt Instrument, Interest Rate, Stated Percentage		4.25%			4.25%
Long-term Debt	$ 1,816,609	$ 1,798,399			$ 1,852,230
The Commercial Loan [Member] \| Revolving Credit Facility [Member]
Long-term Line of Credit		5,900,000			6,000,000
Line of Credit Facility, Remaining Borrowing Capacity		$ 1,100,000
Revolving Credit Facility [Member] \| BNC [Member] \| Scenario, Forecast [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 6,000,000	$ 6,500,000
Revolving Credit Facility [Member] \| BNC [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.65%
Revolving Credit Facility [Member] \| BNC [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 7,000,000
Line of Credit Facility, Interest Rate at Period End		4.09%
Revolving Credit Facility [Member] \| Certain Receivables Aged Ninety Days or Over [Member] \| The Commercial Loan [Member]
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
Revolving Credit Facility [Member] \| Certain Foreign Receivables [Member] \| The Commercial Loan [Member]
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		$ 1,000,000
Revolving Credit Facility [Member] \| Certain Raw Materials of Inventory [Member] \| The Commercial Loan [Member]
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category Used For Calculation		25.00%
Revolving Credit Facility [Member] \| The Commercial Loan [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 9,000,000
Line of Credit Facility, Remaining Borrowing Capacity					2,500,000
Long-term Debt		$ 7,016,970			$ 7,227,007