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Note 8 - Stockholders' Equity (Details Textual) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 28, 2019 | Jun. 03, 2019 | Aug. 31, 2019 USD ($) $ / shares shares | Aug. 31, 2018 $ / shares shares | Jan. 15, 2015 USD ($)
Stockholders' Equity Note, Stock Split, Conversion Ratio | 2 | 2 |  |  |
Stock Repurchase Program, Authorized Amount | $ |  |  |  |  | $ 3,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ |  |  | $ 2,640,548 |  |
Stock Repurchased and Retired During Period, Shares |  |  | 0 | 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  | 0 | 8,820 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Including Cashless Exercises |  |  |  | 12,814 |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | $ / shares |  |  |  | $ 5.80 |

X
- Definition Number of share options (or share units) exercised during the current period, including cashless exercises. + References No definition available. + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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