Note 5 - Earnings Per Share - Computation of Earnings Per Share (Details) - USD ($) |
3 Months Ended | 6 Months Ended | 9 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
Aug. 31, 2020 |
May 31, 2020 |
Aug. 31, 2019 |
May 31, 2019 |
May 31, 2020 |
May 31, 2019 |
Aug. 31, 2020 |
Aug. 31, 2019 |
|
| Net income available to common shareholders | $ 103,611 | $ 149,476 | $ 75,246 | $ 374,473 | ||||
| Weighted average shares outstanding - Basic and diluted (in shares) | 7,263,508 | 7,263,508 | 7,263,508 | 7,263,508 | 7,263,508 | 7,263,508 | 7,263,508 | 7,263,508 |
| Net Income per share - Basic and Diluted (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.02 | $ 0.02 | $ 0.01 | $ 0.05 | $ 0.01 | $ 0.05 |