Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) |
May 31, 2022 |
Aug. 31, 2021 |
|---|---|---|
| Trade receivable excluding joint ventures, allowance for doubtful accounts | $ 382,000 | $ 382,000 |
| Preferred stock, par value (in dollars per share) | $ 0 | $ 0 |
| Preferred stock, shares authorized (in shares) | 10,000 | 10,000 |
| Preferred stock, shares issued (in shares) | 0 | 0 |
| Preferred stock, shares outstanding (in shares) | 0 | 0 |
| Common stock, par value (in dollars per share) | $ 0.02 | $ 0.02 |
| Common stock, shares authorized (in shares) | 15,000,000 | 15,000,000 |
| Common stock, shares issued (in shares) | 9,232,483 | 9,184,811 |
| Common stock, shares outstanding (in shares) | 9,232,483 | 9,184,811 |