Note 12 - Segment and Geographic Location - Net Sales by Geographic Location (Details) - USD ($)	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
Inside the USA to Unaffiliated Customers [Member]
Net sales by segment	$ 20,304,480	$ 19,329,979
Joint Ventures in Which the Company is a Shareholder Directly and Indirectly Outside the USA [Member]
Net sales by segment	2,721,905	2,831,301
Unaffiliated Customers Outside the USA [Member]
Net sales by segment	9,907,180	8,161,413
Net sales by segment	$ 32,933,565	$ 30,322,693