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Note 9 - Stockholders' Equity (Details Textual) - $ / shares	6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Stock Repurchased and Retired During Period, Shares	11,475	5,461
Treasury Stock Acquired, Average Cost Per Share	$ 12.92	$ 12.92
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	56,677	53,447
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 13.40	$ 14.85

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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