Note 11 - Stock-Based Compensation (Details) - Stock Option Activity (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Stock Option Activity [Abstract]
Outstanding	260,627	203,873	189,839
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 9.84	$ 10.01	$ 9.07
Options Outstanding, Aggregate Intrinsic Value (in Dollars)	$ 1,358,325
Options granted	118,294	26,000
Options granted, Weighted Average Exercise Price (in Dollars per share)	$ 10.25	$ 16.45
Options exercised	(37,040)	(3,966)
Options exercised, Weighted Average Exercise Price (in Dollars per share)	$ 9.96	$ 8.71
Options terminated	(24,500)	(8,000)
Options terminated, Weighted Average Exercise Price (in Dollars per share)	$ 13.12	$ 9.23
Exercisable at August 31, 2013	134,998
Exercisable at August 31, 2013 (in Dollars per share)	$ 9.48
Exercisable at August 31, 2013 (in Dollars)	$ 768,043