Note 3 - Allowance for Credit Losses for Trade Accounts Receivable - Summary of Changes in the Allowance for Doubtful Accounts (Details) - USD ($) |
9 Months Ended | |
|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Balance at beginning of period | $ 72,909 | $ 92,125 |
| Bad debt expense (recovery) | 13,494 | 496 |
| Losses charged to allowance | (1,854) | 0 |
| Balance at end of period | $ 84,549 | $ 92,621 |
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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