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Note 2 - Allowance for Credit Losses for Trade Accounts Receivable | 12 Months Ended
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Oct. 31, 2023
Notes to Financial Statements |
Allowance for Doubtful Accounts for Trade Accounts Receivable Disclosure [Text Block] |
(2) | Allowance for Credit Losses for Trade Accounts Receivable
A summary of changes in the allowance for credit losses for trade accounts receivable for the years ended October 31, 2023, 2022 and 2021 follows:
|  | Years ended October 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Balance at beginning of year |  | $ | 69,643 |  |  | $ | 61,527 |  |  | $ | 524,617 |
Bad debt expense |  |  | 1,546 |  |  |  | 8,116 |  |  |  | 10,750 |
Losses charged to allowance |  |  | — |  |  |  | — |  |  |  | (473,840 | )
Balance at end of year |  | $ | 71,189 |  |  | $ | 69,643 |  |  | $ | 61,527 |

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- Definition Allowance for doubtful accounts for trade accounts receivable + References No definition available. + Details
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Namespace Prefix: | occ_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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