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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
--- | --- | --- | --- | --- | --- | ---
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 |  | $ 84 | 78,167 | 0 | 0 | 78,251
Stock option exercises (in shares) |  | 25,000 |  |  |  |
Share-based compensation | $ 0 | $ 0 | 103,476 | 0 | 0 | 103,476
Net income | 0 | 0 | 0 | 0 | 633,972 | 633,972
Unrealized holding gain (loss) on investments | 0 | 0 | 0 | 11,796 | 0 | 11,796
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 |  |  |  |
Balance at Aug. 31, 2019 | $ 433 | $ 79,427 | 172,360,413 | 3,891 | (97,713,023) | 74,731,141
Balance (in shares) at Aug. 31, 2019 | 432,513 | 23,826,598 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based compensation | $ 0 | $ 0 | 105,353 | 0 | 0 | 105,353
Net income | 0 | 0 | 0 | 0 | 5,762,465 | 5,762,465
Unrealized holding gain (loss) on investments | 0 | 0 | 0 | (3,891) | 0 | (3,891)
Balance at Nov. 30, 2019 | $ 433 | $ 79,427 | $ 172,465,766 | $ 0 | $ (91,950,558) | $ 80,595,068
Balance (in shares) at Nov. 30, 2019 | 432,513 | 23,826,598 |  |  |  |

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