XML 40 R29.htm IDEA: XBRL DOCUMENT
v3.21.2

Note 7 - Accrued Expenses (Tables) | 9 Months Ended
--- | ---
Aug. 31, 2021
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  | August 31, 2021 |  |  | November 30, 2020 |
Salaries, wages, and commissions |  | $ | 724,084 |  |  | $ | 726,625 |
Accrued warranty expense |  |  | 245,680 |  |  |  | 291,454 |
Other |  |  | 255,334 |  |  |  | 261,233 |
|  | $ | 1,225,098 |  |  | $ | 1,279,312 |

X
- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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