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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) | Aug. 31, 2018 | Aug. 31, 2017
--- | --- | ---
Common stock: |  |
Common stock, par value (in dollars per share) | $ 0.003 | $ 0.003
Common stock, shares authorized (in shares) | 40,000,000 | 40,000,000
Common stock, shares issued (in shares) | 23,764,098 | 23,764,098
Common stock, shares outstanding (in shares) | 23,764,098 | 23,764,098
Series B Preferred Stock [Member] |  |
Preferred stock: |  |
Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001
Preferred stock, shares authorized (in shares) | 25,000,000 | 25,000,000
Preferred stock, shares issued (in shares) | 432,513 | 432,513
Preferred stock, shares outstanding (in shares) | 432,513 | 432,513
Liquidation preference | $ 432,513 | $ 432,513

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