Note 4 - Receivables - Activity in the Allowance for Credit Losses (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Aug. 31, 2026 |
Aug. 31, 2025 |
Aug. 31, 2026 |
Aug. 31, 2025 |
|
| Balance, beginning | $ 72,914 | $ 47,839 | $ 60,601 | $ 108,636 |
| Provision charged to expense (expected recovery) | (46,056) | (3,150) | (33,743) | (63,947) |
| Less amounts (charged-off) recovered | 0 | 0 | 0 | 0 |
| Balance, ending | $ 26,858 | $ 44,689 | $ 26,858 | $ 44,689 |
| X | ||||||||||
- Definition Amount of expense related to write-down of receivables to the amount expected to be collected prior to the consideration of charge-offs. Includes, but is not limited to, accounts receivable and notes receivable. No definition available.
|
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|