Note 9 - Line of Credit and Long-term Debt (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Feb. 28, 2021 |
Nov. 30, 2020 |
Nov. 30, 2021 |
Nov. 30, 2020 |
Feb. 28, 2021 |
|
| Proceeds from Notes Payable, Total | $ 0 | $ 1,537,200 | |||
| SBA Loans [Member] | |||||
| Forgiveness of Indebtedness | $ 1,400,000 | $ 108,000 | |||
| Line of Credit [Member] | Wells Fargo Bank [Member] | |||||
| Proceeds from Notes Payable, Total | $ 1,500,000 | ||||
| Long-term Line of Credit, Total | 5,000,000.0 | ||||
| Line of Credit Facility, Remaining Borrowing Capacity | $ 5,000,000.0 | ||||
| Debt Instrument, Interest Rate, Effective Percentage | 2.40% | ||||
| Line of Credit [Member] | Wells Fargo Bank [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Debt Instrument, Basis Spread on Variable Rate | 2.37% | ||||