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CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Deficit [Member] Adjustments [Member] | Accumulated Deficit [Member] | Adjustments [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Aug. 31, 2019 | $ 0 | $ 79 | $ 172,361 | $ 4 |  | $ (97,713) |  | $ 74,731
Balance (in shares) at Aug. 31, 2019 | 433 | 23,827 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Stock option exercises | $ 0 | $ 0 | 39 | 0 |  | 0 |  | 39
Stock option exercises (in shares) | 0 | 15 |  |  |  |  |  |
Stock granted for services | $ 0 | $ 0 | 149 | 0 |  | 0 |  | 149
Stock granted for services (in shares) | 0 | 12 |  |  |  |  |  |
Share-based compensation | $ 0 | $ 0 | 286 | 0 |  | 0 |  | 286
Net income | 0 | 0 | 0 | 0 |  | 6,064 |  | 6,064
Unrealized holding loss on investments | 0 | 0 | 0 | (4) |  | 0 |  | (4)
Balance at May. 31, 2020 | $ 0 | $ 79 | 172,835 | 0 |  | (91,649) |  | 81,265
Balance (in shares) at May. 31, 2020 | 433 | 23,854 |  |  |  |  |  |
Balance at Feb. 29, 2020 | $ 0 | $ 79 | 172,749 | 0 |  | (91,676) |  | 81,152
Balance (in shares) at Feb. 29, 2020 | 433 | 23,852 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Stock option exercises | $ 0 | $ 0 | 4 | 0 |  | 0 |  | 4
Stock option exercises (in shares) | 0 | 2 |  |  |  |  |  |
Stock granted for services | $ 0 | $ 0 | 0 | 0 |  | 0 |  | 0
Stock granted for services (in shares) | 0 | 0 |  |  |  |  |  |
Share-based compensation | $ 0 | $ 0 | 82 | 0 |  | 0 |  | 82
Net income | 0 | 0 | 0 | 0 |  | 27 |  | 27
Unrealized holding loss on investments |  |  |  |  |  |  |  | 0
Balance at May. 31, 2020 | $ 0 | $ 79 | 172,835 | 0 |  | (91,649) |  | 81,265
Balance (in shares) at May. 31, 2020 | 433 | 23,854 |  |  |  |  |  |
Balance at Aug. 31, 2020 | $ 0 | $ 80 | 172,927 | 0 |  | (90,963) |  | 82,044
Balance (in shares) at Aug. 31, 2020 | 433 | 23,856 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | $ (545) | 17,652
Balance at Feb. 28, 2021 | $ 0 | $ 80 | 173,254 | 0 | $ (545) | (72,766) | (545) | 100,568
Balance (in shares) at Feb. 28, 2021 | 433 | 23,888 |  |  |  |  |  |
Balance at Aug. 31, 2020 | $ 0 | $ 80 | 172,927 | 0 |  | (90,963) |  | 82,044
Balance (in shares) at Aug. 31, 2020 | 433 | 23,856 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Stock option exercises | $ 0 | $ 0 | 62 | 0 |  | 0 |  | 62
Stock option exercises (in shares) | 0 | 42 |  |  |  |  |  |
Stock granted for services | $ 0 | $ 0 | 136 | 0 |  | 0 |  | 136
Stock granted for services (in shares) | 0 | 12 |  |  |  |  |  |
Share-based compensation | $ 0 | $ 0 | 268 | 0 |  | 0 |  | 268
Net income | 0 | 0 | 0 | 0 |  | 18,276 |  | 18,276
Unrealized holding loss on investments |  |  |  |  |  |  |  | 0
Balance at May. 31, 2021 | $ 0 | $ 80 | 173,393 | 0 |  | (72,687) |  | 100,786
Balance (in shares) at May. 31, 2021 | 433 | 23,910 |  |  |  |  |  |
Balance at Feb. 28, 2021 | $ 0 | $ 80 | 173,254 | 0 | $ (545) | (72,766) | $ (545) | 100,568
Balance (in shares) at Feb. 28, 2021 | 433 | 23,888 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Stock option exercises | $ 0 | $ 0 | 48 | 0 |  | 0 |  | 48
Stock option exercises (in shares) | 0 | 22 |  |  |  |  |  |
Stock granted for services | $ 0 | $ 0 | 0 | 0 |  | 0 |  | 0
Stock granted for services (in shares) | 0 | 0 |  |  |  |  |  |
Share-based compensation | $ 0 | $ 0 | 91 | 0 |  | 0 |  | 91
Net income | 0 | 0 | 0 | 0 |  | 624 |  | 624
Unrealized holding loss on investments |  |  |  |  |  |  |  | 0
Balance at May. 31, 2021 | $ 0 | $ 80 | $ 173,393 | $ 0 |  | $ (72,687) |  | $ 100,786
Balance (in shares) at May. 31, 2021 | 433 | 23,910 |  |  |  |  |  |

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