CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (unaudited) - USD ($) |
Preferred Stock [Member] |
Common Stock [Member] |
Additional Paid-in Capital [Member] |
Accumulated Other Comprehensive Income (Loss) [Member] |
Accumulated Deficit [Member] |
Total |
|---|---|---|---|---|---|---|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
| Adoption of accounting standards | $ 0 | $ 0 | $ 0 | $ 0 | $ 1,055,049 | $ 1,055,049 |
| Balance at Aug. 31, 2017 | $ 433 | $ 79,185 | 171,431,486 | (11,105) | (103,993,900) | 67,506,099 |
| Balance (in shares) at Aug. 31, 2017 | 432,513 | 23,754,098 | ||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
| Stock option exercises | $ 33 | 74,967 | 0 | 0 | 75,000 | |
| Stock option exercises (in shares) | 10,000 | |||||
| Share-based compensation | $ 0 | $ 0 | 157,578 | 0 | 0 | 157,578 |
| Net income (loss) | 0 | 0 | 0 | 0 | 3,551 | 3,551 |
| Unrealized holding gain on investments | 0 | 0 | 0 | 30,718 | 0 | 30,718 |
| Balance at Feb. 28, 2018 | $ 433 | $ 79,218 | 171,664,031 | 19,613 | (102,935,300) | 68,827,995 |
| Balance (in shares) at Feb. 28, 2018 | 432,513 | 23,764,098 | ||||
| Balance at Nov. 30, 2017 | $ 433 | $ 79,185 | 171,511,679 | 8,517 | (103,035,462) | 68,564,352 |
| Balance (in shares) at Nov. 30, 2017 | 432,513 | 23,754,098 | ||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
| Stock option exercises | $ 33 | 74,967 | 0 | 0 | 75,000 | |
| Stock option exercises (in shares) | 10,000 | |||||
| Share-based compensation | $ 0 | $ 0 | 77,385 | 0 | 0 | 77,385 |
| Net income (loss) | 0 | 0 | 0 | 0 | 100,162 | 100,162 |
| Unrealized holding gain on investments | 0 | 0 | 0 | 11,096 | 0 | 11,096 |
| Balance at Feb. 28, 2018 | $ 433 | $ 79,218 | 171,664,031 | 19,613 | (102,935,300) | 68,827,995 |
| Balance (in shares) at Feb. 28, 2018 | 432,513 | 23,764,098 | ||||
| Balance at Aug. 31, 2018 | $ 433 | $ 79,218 | 171,831,293 | 66,446 | (102,524,171) | 69,453,219 |
| Balance (in shares) at Aug. 31, 2018 | 432,513 | 23,764,098 | ||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
| Stock option exercises | $ 126 | 114,725 | 0 | 0 | 114,851 | |
| Stock option exercises (in shares) | 37,500 | |||||
| Share-based compensation | $ 0 | $ 0 | 161,717 | 0 | 0 | 161,717 |
| Net income (loss) | 0 | 0 | 0 | 0 | 537,947 | 537,947 |
| Unrealized holding gain on investments | 0 | 0 | 0 | (53,759) | 0 | (53,759) |
| Balance at Feb. 28, 2019 | $ 433 | $ 79,344 | 172,107,735 | 12,687 | (101,986,224) | 70,213,975 |
| Balance (in shares) at Feb. 28, 2019 | 432,513 | 23,801,598 | ||||
| Balance at Nov. 30, 2018 | $ 433 | $ 79,302 | 172,012,936 | 78,242 | (101,890,199) | 70,280,714 |
| Balance (in shares) at Nov. 30, 2018 | 432,513 | 23,789,098 | ||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
| Stock option exercises | $ 42 | 36,558 | 0 | 0 | 36,600 | |
| Stock option exercises (in shares) | 12,500 | |||||
| Share-based compensation | $ 0 | $ 0 | 58,241 | 0 | 0 | 58,241 |
| Net income (loss) | 0 | 0 | 0 | 0 | (96,025) | (96,025) |
| Unrealized holding gain on investments | 0 | 0 | 0 | (65,555) | 0 | (65,555) |
| Balance at Feb. 28, 2019 | $ 433 | $ 79,344 | $ 172,107,735 | $ 12,687 | $ (101,986,224) | $ 70,213,975 |
| Balance (in shares) at Feb. 28, 2019 | 432,513 | 23,801,598 |