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Note 10 - Exercised Stock Options (Details) - $ / shares	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2013
Exercise 1 [Member]
Options exercised (in shares)	18,000	60,000	25,140
Exercise price (in dollars per share)	$ 9.76	$ 7.65	$ 9.95
Exercise 2 [Member]
Options exercised (in shares)	18,000	14,000	4,000
Exercise price (in dollars per share)	$ 7.65	$ 8.57	$ 12.84
Exercise 3 [Member]
Options exercised (in shares)	2,333		4,000
Exercise price (in dollars per share)	$ 10.20		$ 8.57
Exercised 4 [Member]
Options exercised (in shares)			1,734
Exercise price (in dollars per share)			$ 7.65
Exercised 5 [Member]
Options exercised (in shares)			1,500
Exercise price (in dollars per share)			$ 9.76
Exercised 6 [Member]
Options exercised (in shares)			666
Exercise price (in dollars per share)			$ 7.75
Options exercised (in shares)	38,333	74,000	37,040
Exercise price (in dollars per share)	$ 9	$ 7.82	$ 9.96

X

- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

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